{"id":9531,"date":"2025-08-05T13:58:09","date_gmt":"2025-08-05T05:58:09","guid":{"rendered":"https:\/\/aobosteel.com\/?page_id=9531"},"modified":"2026-10-22T11:21:04","modified_gmt":"2026-10-22T03:21:04","slug":"how-to-select-tool-steels","status":"publish","type":"page","link":"https:\/\/aobosteel.com\/ko\/how-to-select-tool-steels\/","title":{"rendered":"\uc6a9\ub3c4 \ubc0f \ud2b9\uc131\uc5d0 \ub530\ub978 \uacf5\uad6c\uac15 \uc120\ud0dd \ubc29\ubc95"},"content":{"rendered":"\n<h1 class=\"wp-block-heading has-text-align-center\">How to Select Tool Steels<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">A practical route from application to grade. Relative property ratings for ten common tool steels, a selection table by application and working condition, and the technical checks to run before a grade is fixed. Use it as a starting point, then confirm with your heat treater and a service trial.<\/p>\n\n\n\n<style data-noptimize=\"1\">\n.entry-content[class] .tss-steps{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:10px;margin:4px 0 30px;padding:0;list-style:none}\n.entry-content[class] .tss-step{display:flex;align-items:flex-start;gap:9px;background:#f7f7f9;border:1px solid #e5e7eb;border-radius:6px;padding:11px 12px;margin:0}\n.entry-content[class] .tss-n{flex:0 0 auto;width:22px;height:22px;border-radius:50%;background:#2563eb;color:#fff;font-size:12px;font-weight:700;display:flex;align-items:center;justify-content:center;line-height:1}\n.entry-content[class] .tss-t{font-size:14px;line-height:1.35;color:#333}\n@media(max-width:900px){.entry-content[class] .tss-steps{grid-template-columns:repeat(2,minmax(0,1fr))}}\n@media(max-width:520px){.entry-content[class] .tss-steps{grid-template-columns:1fr}}\n<\/style>\n<ol class=\"tss-steps\"><li class=\"tss-step\"><span class=\"tss-n\">1<\/span><span class=\"tss-t\">Find the tool application<\/span><\/li><li class=\"tss-step\"><span class=\"tss-n\">2<\/span><span class=\"tss-t\">Identify the working condition<\/span><\/li><li class=\"tss-step\"><span class=\"tss-n\">3<\/span><span class=\"tss-t\">Check the required property<\/span><\/li><li class=\"tss-step\"><span class=\"tss-n\">4<\/span><span class=\"tss-t\">Compare suitable grades<\/span><\/li><li class=\"tss-step\"><span class=\"tss-n\">5<\/span><span class=\"tss-t\">Confirm process limits<\/span><\/li><\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">1. Property ratings of common tool steels<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Relative ratings for ten grades that cover most die, tool and mold work. Higher is better for every column, and all four columns share the same scale.<\/p>\n\n\n\n<style data-noptimize=\"1\">\n.entry-content[class] .tssr-wrap{margin:6px 0 30px;max-width:none}\n.entry-content[class] .tssr-scroll{overflow-x:auto;border:1px solid #e5e7eb;border-radius:8px;background:#fff;box-shadow:0 1px 2px rgba(16,24,40,.04);-webkit-overflow-scrolling:touch}\n.entry-content[class] .tssr-table{border-collapse:collapse;width:100%;min-width:880px;font-size:14px;margin:0;border:0}\n.entry-content[class] .tssr-table thead th{background:#1e1e2e;color:#fff;text-align:center;padding:10px 11px;font-size:13px;font-weight:600;line-height:1.35;white-space:nowrap;border:0;border-right:1px solid rgba(255,255,255,.1)}\n.entry-content[class] .tssr-table thead th:last-child{border-right:0}\n.entry-content[class] .tssr-table tbody td{padding:9px 11px;border:0;border-bottom:1px solid #e5e7eb;text-align:center;vertical-align:middle;white-space:nowrap;color:#333;font-size:14px}\n.entry-content[class] .tssr-table tbody tr:nth-child(even){background:#f7f7f9}\n.entry-content[class] .tssr-table tbody tr.tssr-group td{background:#eef2f9;text-align:left;font-weight:700;font-size:12.5px;letter-spacing:.04em;text-transform:uppercase;color:#1e1e2e}\n.entry-content[class] .tssr-table tbody tr:last-child td{border-bottom:0}\n.entry-content[class] .tssr-grade{text-align:left;font-weight:700}\n.entry-content[class] .tssr-type{text-align:left;color:#555}\n.entry-content[class] .tssr-meter{display:inline-flex;align-items:center;gap:7px}\n.entry-content[class] .tssr-meter i{display:inline-block;width:44px;height:6px;border-radius:3px;background:#e9ecef;overflow:hidden;font-style:normal}\n.entry-content[class] .tssr-meter i b{display:block;height:100%;border-radius:3px;background:linear-gradient(90deg,#4d94ff,#2563eb)}\n.entry-content[class] .tssr-meter span{font-size:13px;font-weight:600;min-width:14px;color:#1e1e2e}\n.entry-content[class] .tssr-notes-list{margin:16px 0 0;background:#fff;border:1px solid #e5e7eb;border-left:3px solid #2563eb;border-radius:0 8px 8px 0;padding:14px 18px 14px 34px;font-size:13px;color:#5b6470;line-height:1.7}\n.entry-content[class] .tssr-notes-list li{margin:0 0 5px}\n.entry-content[class] .tssr-notes-list li:last-child{margin-bottom:0}\n.entry-content[class] .tssr-notes-list sup{color:#2563eb;font-size:10px;font-weight:700}\n.entry-content[class] .tssr-notes-list b{color:#1e1e2e;font-weight:700}\n@media(max-width:640px){\n.entry-content[class] .tssr-table{font-size:12.5px}\n.entry-content[class] .tssr-table thead th,.entry-content[class] .tssr-table tbody td{padding:8px 9px;font-size:12.5px}\n.entry-content[class] .tssr-notes-list{padding:12px 14px 12px 26px;font-size:12.5px}\n}<\/style>\n<div class=\"tssr-wrap\">\n<div class=\"tssr-scroll\">\n<table class=\"tssr-table\">\n            <thead>\n              <tr>\n                <th>Grade<\/th><th>Type<\/th>\n                <th>Abrasion resistance<\/th><th>Toughness<\/th><th>Machinability<\/th><th>Grindability<\/th>\n              <\/tr>\n            <\/thead>\n            <tbody>\n<tr class=\"tssr-group\"><td colspan=\"6\">High-speed tool steels<\/td><\/tr>\n<tr><td class=\"tssr-grade\">M4<\/td><td class=\"tssr-type\">High-speed, molybdenum<\/td><td class=\"tssr-num\"><span class=\"tssr-meter\"><i><b style=\"width:79%\"><\/b><\/i><span>103<\/span><\/span><\/td><td class=\"tssr-num\"><span class=\"tssr-meter\"><i><b style=\"width:11%\"><\/b><\/i><span>14<\/span><\/span><\/td><td class=\"tssr-num\"><span class=\"tssr-meter\"><i><b style=\"width:46%\"><\/b><\/i><span>60<\/span><\/span><\/td><td class=\"tssr-num\"><span class=\"tssr-meter\"><i><b style=\"width:8%\"><\/b><\/i><span>10<\/span><\/span><\/td><\/tr>\n<tr><td class=\"tssr-grade\">M2<\/td><td class=\"tssr-type\">High-speed, molybdenum<\/td><td class=\"tssr-num\"><span class=\"tssr-meter\"><i><b style=\"width:73%\"><\/b><\/i><span>95<\/span><\/span><\/td><td class=\"tssr-num\"><span class=\"tssr-meter\"><i><b style=\"width:15%\"><\/b><\/i><span>20<\/span><\/span><\/td><td class=\"tssr-num\"><span class=\"tssr-meter\"><i><b style=\"width:50%\"><\/b><\/i><span>65<\/span><\/span><\/td><td class=\"tssr-num\"><span class=\"tssr-meter\"><i><b style=\"width:8%\"><\/b><\/i><span>10<\/span><\/span><\/td><\/tr>\n<tr class=\"tssr-group\"><td colspan=\"6\">Cold-work tool steels<\/td><\/tr>\n<tr><td class=\"tssr-grade\">D2<\/td><td class=\"tssr-type\">Cold work, high-chromium<\/td><td class=\"tssr-num\"><span class=\"tssr-meter\"><i><b style=\"width:77%\"><\/b><\/i><span>100<\/span><\/span><\/td><td class=\"tssr-num\"><span class=\"tssr-meter\"><i><b style=\"width:15%\"><\/b><\/i><span>20<\/span><\/span><\/td><td class=\"tssr-num\"><span class=\"tssr-meter\"><i><b style=\"width:46%\"><\/b><\/i><span>60<\/span><\/span><\/td><td class=\"tssr-num\"><span class=\"tssr-meter\"><i><b style=\"width:8%\"><\/b><\/i><span>10<\/span><\/span><\/td><\/tr>\n<tr><td class=\"tssr-grade\">A2<\/td><td class=\"tssr-type\">Cold work, air-hardening<\/td><td class=\"tssr-num\"><span class=\"tssr-meter\"><i><b style=\"width:50%\"><\/b><\/i><span>65<\/span><\/span><\/td><td class=\"tssr-num\"><span class=\"tssr-meter\"><i><b style=\"width:31%\"><\/b><\/i><span>40<\/span><\/span><\/td><td class=\"tssr-num\"><span class=\"tssr-meter\"><i><b style=\"width:50%\"><\/b><\/i><span>65<\/span><\/span><\/td><td class=\"tssr-num\"><span class=\"tssr-meter\"><i><b style=\"width:34%\"><\/b><\/i><span>44<\/span><\/span><\/td><\/tr>\n<tr><td class=\"tssr-grade\">O1<\/td><td class=\"tssr-type\">Cold work, oil-hardening<\/td><td class=\"tssr-num\"><span class=\"tssr-meter\"><i><b style=\"width:38%\"><\/b><\/i><span>50<\/span><\/span><\/td><td class=\"tssr-num\"><span class=\"tssr-meter\"><i><b style=\"width:11%\"><\/b><\/i><span>14<\/span><\/span><\/td><td class=\"tssr-num\"><span class=\"tssr-meter\"><i><b style=\"width:69%\"><\/b><\/i><span>90<\/span><\/span><\/td><td class=\"tssr-num\"><span class=\"tssr-meter\"><i><b style=\"width:55%\"><\/b><\/i><span>72<\/span><\/span><\/td><\/tr>\n<tr><td class=\"tssr-grade\">A8<\/td><td class=\"tssr-type\">Cold work, air-hardening<\/td><td class=\"tssr-num\"><span class=\"tssr-meter\"><i><b style=\"width:37%\"><\/b><\/i><span>48<\/span><\/span><\/td><td class=\"tssr-num\"><span class=\"tssr-meter\"><i><b style=\"width:58%\"><\/b><\/i><span>75<\/span><\/span><\/td><td class=\"tssr-num\"><span class=\"tssr-meter\"><i><b style=\"width:46%\"><\/b><\/i><span>60<\/span><\/span><\/td><td class=\"tssr-num\"><span class=\"tssr-meter\"><i><b style=\"width:58%\"><\/b><\/i><span>75<\/span><\/span><\/td><\/tr>\n<tr><td class=\"tssr-grade\">O6<\/td><td class=\"tssr-type\">Cold work, oil-hardening<\/td><td class=\"tssr-num\"><span class=\"tssr-meter\"><i><b style=\"width:34%\"><\/b><\/i><span>44<\/span><\/span><\/td><td class=\"tssr-num\"><span class=\"tssr-meter\"><i><b style=\"width:8%\"><\/b><\/i><span>10<\/span><\/span><\/td><td class=\"tssr-num\"><span class=\"tssr-meter\"><i><b style=\"width:96%\"><\/b><\/i><span>125<\/span><\/span><\/td><td class=\"tssr-num\"><span class=\"tssr-meter\"><i><b style=\"width:58%\"><\/b><\/i><span>76<\/span><\/span><\/td><\/tr>\n<tr class=\"tssr-group\"><td colspan=\"6\">Hot-work tool steels<\/td><\/tr>\n<tr><td class=\"tssr-grade\">H13<\/td><td class=\"tssr-type\">Hot work, chromium<\/td><td class=\"tssr-num\"><span class=\"tssr-meter\"><i><b style=\"width:23%\"><\/b><\/i><span>30<\/span><\/span><\/td><td class=\"tssr-num\"><span class=\"tssr-meter\"><i><b style=\"width:77%\"><\/b><\/i><span>100<\/span><\/span><\/td><td class=\"tssr-num\"><span class=\"tssr-meter\"><i><b style=\"width:58%\"><\/b><\/i><span>75<\/span><\/span><\/td><td class=\"tssr-num\"><span class=\"tssr-meter\"><i><b style=\"width:77%\"><\/b><\/i><span>100<\/span><\/span><\/td><\/tr>\n<tr class=\"tssr-group\"><td colspan=\"6\">Shock-resisting tool steels<\/td><\/tr>\n<tr><td class=\"tssr-grade\">S5<\/td><td class=\"tssr-type\">Shock-resisting<\/td><td class=\"tssr-num\"><span class=\"tssr-meter\"><i><b style=\"width:34%\"><\/b><\/i><span>44<\/span><\/span><\/td><td class=\"tssr-num\"><span class=\"tssr-meter\"><i><b style=\"width:69%\"><\/b><\/i><span>90<\/span><\/span><\/td><td class=\"tssr-num\"><span class=\"tssr-meter\"><i><b style=\"width:50%\"><\/b><\/i><span>65<\/span><\/span><\/td><td class=\"tssr-num\"><span class=\"tssr-meter\"><i><b style=\"width:65%\"><\/b><\/i><span>85<\/span><\/span><\/td><\/tr>\n<tr><td class=\"tssr-grade\">S7<\/td><td class=\"tssr-type\">Shock-resisting<\/td><td class=\"tssr-num\"><span class=\"tssr-meter\"><i><b style=\"width:32%\"><\/b><\/i><span>42<\/span><\/span><\/td><td class=\"tssr-num\"><span class=\"tssr-meter\"><i><b style=\"width:79%\"><\/b><\/i><span>103<\/span><\/span><\/td><td class=\"tssr-num\"><span class=\"tssr-meter\"><i><b style=\"width:58%\"><\/b><\/i><span>75<\/span><\/span><\/td><td class=\"tssr-num\"><span class=\"tssr-meter\"><i><b style=\"width:71%\"><\/b><\/i><span>92<\/span><\/span><\/td><\/tr>\n            <\/tbody>\n          <\/table>\n<\/div>\n<ul class=\"tssr-notes-list\">\n<li><sup>(a)<\/sup> <b>Abrasion resistance.<\/b> M4, D2, and M2 have the highest abrasion-resistance ratings in this comparison.<\/li>\n<li><sup>(b)<\/sup> <b>Toughness.<\/b> S7, H13, and S5 have the highest toughness ratings in this comparison.<\/li>\n<li><sup>(c)<\/sup> <b>Machinability.<\/b> O6 and O1 are easier to machine than high-wear-resistance grades such as D2, M2, and M4.<\/li>\n<li><sup>(d)<\/sup> <b>Grindability.<\/b> H13, S7, and S5 are easier to grind, while D2, M2, and M4 are more difficult.<\/li>\n<li><sup>(e)<\/sup> <b>Reading the bars.<\/b> All four properties are indexed on the same relative scale, so a longer bar means a higher rating for that property, not a higher overall ranking of the grade.<\/li>\n        <\/ul>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\">2. Tool steel selection by application<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Starting point by tool and working condition. It does not replace application testing or heat-treatment confirmation. Grade names link to the grade pages.<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">Application \/ tool<\/th><th class=\"has-text-align-left\" data-align=\"left\">Working condition<\/th><th class=\"has-text-align-left\" data-align=\"left\">Main required property<\/th><th class=\"has-text-align-left\" data-align=\"left\">General grade<\/th><th class=\"has-text-align-left\" data-align=\"left\">Higher-performance grade<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-left\" data-align=\"left\">Cutting tools<\/td><td class=\"has-text-align-left\" data-align=\"left\">Light cuts, slow speeds<\/td><td class=\"has-text-align-left\" data-align=\"left\">Wear resistance with acceptable grindability<\/td><td class=\"has-text-align-left\" data-align=\"left\"><a href=\"https:\/\/aobosteel.com\/o1-tool-steel\/\">O1<\/a>, <a href=\"https:\/\/aobosteel.com\/a2-tool-steel\/\">A2<\/a><\/td><td class=\"has-text-align-left\" data-align=\"left\"><a href=\"https:\/\/aobosteel.com\/m2-tool-steel\/\">M2<\/a><\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Cutting tools<\/td><td class=\"has-text-align-left\" data-align=\"left\">Heavy cuts, fast speeds<\/td><td class=\"has-text-align-left\" data-align=\"left\">Wear resistance and hot hardness<\/td><td class=\"has-text-align-left\" data-align=\"left\">M2<\/td><td class=\"has-text-align-left\" data-align=\"left\">M4, T1, <a href=\"https:\/\/aobosteel.com\/m42-tool-steel\/\">M42<\/a><\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Boring tools<\/td><td class=\"has-text-align-left\" data-align=\"left\">Metal cutting<\/td><td class=\"has-text-align-left\" data-align=\"left\">Hot hardness and wear resistance<\/td><td class=\"has-text-align-left\" data-align=\"left\">M2<\/td><td class=\"has-text-align-left\" data-align=\"left\">M4<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Broaches<\/td><td class=\"has-text-align-left\" data-align=\"left\">Metalworking<\/td><td class=\"has-text-align-left\" data-align=\"left\">Wear resistance and hot hardness<\/td><td class=\"has-text-align-left\" data-align=\"left\">M2<\/td><td class=\"has-text-align-left\" data-align=\"left\">M4<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Form cutters<\/td><td class=\"has-text-align-left\" data-align=\"left\">Profile cutting<\/td><td class=\"has-text-align-left\" data-align=\"left\">Wear resistance and hot hardness<\/td><td class=\"has-text-align-left\" data-align=\"left\">M2<\/td><td class=\"has-text-align-left\" data-align=\"left\">M4<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Milling cutters<\/td><td class=\"has-text-align-left\" data-align=\"left\">Continuous cutting<\/td><td class=\"has-text-align-left\" data-align=\"left\">Hot hardness and edge wear resistance<\/td><td class=\"has-text-align-left\" data-align=\"left\">M2<\/td><td class=\"has-text-align-left\" data-align=\"left\">M4<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Thread cutters<\/td><td class=\"has-text-align-left\" data-align=\"left\">Thread cutting<\/td><td class=\"has-text-align-left\" data-align=\"left\">Wear resistance and hot hardness<\/td><td class=\"has-text-align-left\" data-align=\"left\">M2<\/td><td class=\"has-text-align-left\" data-align=\"left\">M4<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Woodworking cutters<\/td><td class=\"has-text-align-left\" data-align=\"left\">Edge wear with regrinding requirement<\/td><td class=\"has-text-align-left\" data-align=\"left\">Wear resistance and grindability<\/td><td class=\"has-text-align-left\" data-align=\"left\">O1<\/td><td class=\"has-text-align-left\" data-align=\"left\">M2<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Cold shear blades<\/td><td class=\"has-text-align-left\" data-align=\"left\">Light gauge stock<\/td><td class=\"has-text-align-left\" data-align=\"left\">Wear resistance with moderate toughness<\/td><td class=\"has-text-align-left\" data-align=\"left\">A2<\/td><td class=\"has-text-align-left\" data-align=\"left\"><a href=\"https:\/\/aobosteel.com\/d2-tool-steel\/\">D2<\/a><\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Cold shear blades<\/td><td class=\"has-text-align-left\" data-align=\"left\">Heavy gauge stock<\/td><td class=\"has-text-align-left\" data-align=\"left\">Impact resistance and cracking resistance<\/td><td class=\"has-text-align-left\" data-align=\"left\">S5<\/td><td class=\"has-text-align-left\" data-align=\"left\"><a href=\"https:\/\/aobosteel.com\/s7-tool-steel\/\">S7<\/a><\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Hot shear blades<\/td><td class=\"has-text-align-left\" data-align=\"left\">Hot cutting<\/td><td class=\"has-text-align-left\" data-align=\"left\">Hot hardness and toughness<\/td><td class=\"has-text-align-left\" data-align=\"left\">S7, A8<\/td><td class=\"has-text-align-left\" data-align=\"left\"><a href=\"https:\/\/aobosteel.com\/h13-tool-steel\/\">H13<\/a>, <a href=\"https:\/\/aobosteel.com\/h21-tool-steel\/\">H21<\/a><\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Paper knives<\/td><td class=\"has-text-align-left\" data-align=\"left\">Edge wear<\/td><td class=\"has-text-align-left\" data-align=\"left\">Wear resistance<\/td><td class=\"has-text-align-left\" data-align=\"left\">D2<\/td><td class=\"has-text-align-left\" data-align=\"left\">M2, M4<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Rotary knives<\/td><td class=\"has-text-align-left\" data-align=\"left\">Continuous cutting wear<\/td><td class=\"has-text-align-left\" data-align=\"left\">Wear resistance<\/td><td class=\"has-text-align-left\" data-align=\"left\">A8<\/td><td class=\"has-text-align-left\" data-align=\"left\">D2<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Chipper knives<\/td><td class=\"has-text-align-left\" data-align=\"left\">Impact and edge wear<\/td><td class=\"has-text-align-left\" data-align=\"left\">Toughness with wear resistance<\/td><td class=\"has-text-align-left\" data-align=\"left\">A2, A8<\/td><td class=\"has-text-align-left\" data-align=\"left\">D2, M2<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Blanking dies<\/td><td class=\"has-text-align-left\" data-align=\"left\">Cold work, short runs<\/td><td class=\"has-text-align-left\" data-align=\"left\">Balanced wear resistance and machinability<\/td><td class=\"has-text-align-left\" data-align=\"left\">O1, O6<\/td><td class=\"has-text-align-left\" data-align=\"left\">A2<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Blanking dies<\/td><td class=\"has-text-align-left\" data-align=\"left\">Cold work, long runs<\/td><td class=\"has-text-align-left\" data-align=\"left\">Wear resistance and dimensional stability<\/td><td class=\"has-text-align-left\" data-align=\"left\">A2<\/td><td class=\"has-text-align-left\" data-align=\"left\">D2, M2<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Bending dies<\/td><td class=\"has-text-align-left\" data-align=\"left\">Cold forming<\/td><td class=\"has-text-align-left\" data-align=\"left\">Toughness and dimensional stability<\/td><td class=\"has-text-align-left\" data-align=\"left\">O1, O6<\/td><td class=\"has-text-align-left\" data-align=\"left\">A2, D2<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Coining dies<\/td><td class=\"has-text-align-left\" data-align=\"left\">High pressure cold work<\/td><td class=\"has-text-align-left\" data-align=\"left\">Wear resistance and compressive strength<\/td><td class=\"has-text-align-left\" data-align=\"left\">O1<\/td><td class=\"has-text-align-left\" data-align=\"left\">A2, D2<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Embossing dies<\/td><td class=\"has-text-align-left\" data-align=\"left\">Cold pressure and surface detail<\/td><td class=\"has-text-align-left\" data-align=\"left\">Wear resistance and dimensional stability<\/td><td class=\"has-text-align-left\" data-align=\"left\">A2<\/td><td class=\"has-text-align-left\" data-align=\"left\">D2<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Cold forming dies<\/td><td class=\"has-text-align-left\" data-align=\"left\">General forming<\/td><td class=\"has-text-align-left\" data-align=\"left\">Wear resistance with stability<\/td><td class=\"has-text-align-left\" data-align=\"left\">O1<\/td><td class=\"has-text-align-left\" data-align=\"left\">A2, D2<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Hot forming dies<\/td><td class=\"has-text-align-left\" data-align=\"left\">Hot work<\/td><td class=\"has-text-align-left\" data-align=\"left\">Hot hardness and toughness<\/td><td class=\"has-text-align-left\" data-align=\"left\">H13, S7<\/td><td class=\"has-text-align-left\" data-align=\"left\">H21<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Cold extrusion dies<\/td><td class=\"has-text-align-left\" data-align=\"left\">High pressure and wear<\/td><td class=\"has-text-align-left\" data-align=\"left\">Wear resistance with enough toughness<\/td><td class=\"has-text-align-left\" data-align=\"left\">D2<\/td><td class=\"has-text-align-left\" data-align=\"left\">M2<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Hot extrusion dies for aluminum<\/td><td class=\"has-text-align-left\" data-align=\"left\">Heat softening and thermal fatigue<\/td><td class=\"has-text-align-left\" data-align=\"left\">Hot hardness and toughness<\/td><td class=\"has-text-align-left\" data-align=\"left\">H13<\/td><td class=\"has-text-align-left\" data-align=\"left\"><a href=\"https:\/\/aobosteel.com\/h11-tool-steel\/\">H11<\/a>, H21<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Hot extrusion dies for copper and brass<\/td><td class=\"has-text-align-left\" data-align=\"left\">Higher hot wear and thermal load<\/td><td class=\"has-text-align-left\" data-align=\"left\">Hot hardness and thermal resistance<\/td><td class=\"has-text-align-left\" data-align=\"left\">H13<\/td><td class=\"has-text-align-left\" data-align=\"left\">H21<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Die casting dies<\/td><td class=\"has-text-align-left\" data-align=\"left\">Thermal fatigue, heat checking, cracking<\/td><td class=\"has-text-align-left\" data-align=\"left\">Hot work stability<\/td><td class=\"has-text-align-left\" data-align=\"left\">H13<\/td><td class=\"has-text-align-left\" data-align=\"left\">Premium H13 \/ ESR H13<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Brass die casting dies<\/td><td class=\"has-text-align-left\" data-align=\"left\">Higher hot wear<\/td><td class=\"has-text-align-left\" data-align=\"left\">Hot hardness and heat resistance<\/td><td class=\"has-text-align-left\" data-align=\"left\">H13<\/td><td class=\"has-text-align-left\" data-align=\"left\">H21<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Hot forging dies<\/td><td class=\"has-text-align-left\" data-align=\"left\">Heat, impact, thermal fatigue<\/td><td class=\"has-text-align-left\" data-align=\"left\">Toughness and hot hardness<\/td><td class=\"has-text-align-left\" data-align=\"left\">H13, S7<\/td><td class=\"has-text-align-left\" data-align=\"left\">H21, H43<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Hot trimming dies<\/td><td class=\"has-text-align-left\" data-align=\"left\">Hot impact and edge damage<\/td><td class=\"has-text-align-left\" data-align=\"left\">Toughness and hot hardness<\/td><td class=\"has-text-align-left\" data-align=\"left\">S7, H13<\/td><td class=\"has-text-align-left\" data-align=\"left\">H21<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Cold heading tools<\/td><td class=\"has-text-align-left\" data-align=\"left\">Impact, pressure, wear<\/td><td class=\"has-text-align-left\" data-align=\"left\">Toughness and wear resistance<\/td><td class=\"has-text-align-left\" data-align=\"left\">A2, S7<\/td><td class=\"has-text-align-left\" data-align=\"left\">D2, M2<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Cold punches<\/td><td class=\"has-text-align-left\" data-align=\"left\">Piercing, trimming, forming<\/td><td class=\"has-text-align-left\" data-align=\"left\">Wear resistance and toughness<\/td><td class=\"has-text-align-left\" data-align=\"left\">A2, S7<\/td><td class=\"has-text-align-left\" data-align=\"left\">D2, M2<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Heavy-duty punches<\/td><td class=\"has-text-align-left\" data-align=\"left\">Shock-loaded punching<\/td><td class=\"has-text-align-left\" data-align=\"left\">Toughness first<\/td><td class=\"has-text-align-left\" data-align=\"left\">S5<\/td><td class=\"has-text-align-left\" data-align=\"left\">S7<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Draw punches<\/td><td class=\"has-text-align-left\" data-align=\"left\">Drawing pressure and wear<\/td><td class=\"has-text-align-left\" data-align=\"left\">Wear resistance and toughness<\/td><td class=\"has-text-align-left\" data-align=\"left\">A2, D2<\/td><td class=\"has-text-align-left\" data-align=\"left\">M2<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Thread rolls<\/td><td class=\"has-text-align-left\" data-align=\"left\">Surface pressure and wear<\/td><td class=\"has-text-align-left\" data-align=\"left\">Wear resistance<\/td><td class=\"has-text-align-left\" data-align=\"left\">D2<\/td><td class=\"has-text-align-left\" data-align=\"left\">M2<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Forming rolls<\/td><td class=\"has-text-align-left\" data-align=\"left\">Rolling pressure and wear<\/td><td class=\"has-text-align-left\" data-align=\"left\">Wear resistance and dimensional stability<\/td><td class=\"has-text-align-left\" data-align=\"left\">O1, A2<\/td><td class=\"has-text-align-left\" data-align=\"left\">D2, D7<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Drive rolls<\/td><td class=\"has-text-align-left\" data-align=\"left\">Wear under contact pressure<\/td><td class=\"has-text-align-left\" data-align=\"left\">Wear resistance<\/td><td class=\"has-text-align-left\" data-align=\"left\">D2<\/td><td class=\"has-text-align-left\" data-align=\"left\">D7<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Wire drawing tools<\/td><td class=\"has-text-align-left\" data-align=\"left\">Sliding wear and surface pressure<\/td><td class=\"has-text-align-left\" data-align=\"left\">Wear resistance<\/td><td class=\"has-text-align-left\" data-align=\"left\">D2<\/td><td class=\"has-text-align-left\" data-align=\"left\">M4<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Plug gauges<\/td><td class=\"has-text-align-left\" data-align=\"left\">Wear and dimensional stability<\/td><td class=\"has-text-align-left\" data-align=\"left\">Wear resistance and stability<\/td><td class=\"has-text-align-left\" data-align=\"left\">A2<\/td><td class=\"has-text-align-left\" data-align=\"left\">D2<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Master hobs<\/td><td class=\"has-text-align-left\" data-align=\"left\">Accuracy and wear resistance<\/td><td class=\"has-text-align-left\" data-align=\"left\">Wear resistance and stability<\/td><td class=\"has-text-align-left\" data-align=\"left\">S7<\/td><td class=\"has-text-align-left\" data-align=\"left\">A2, D2<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Cutting hobs<\/td><td class=\"has-text-align-left\" data-align=\"left\">Cutting wear and heat<\/td><td class=\"has-text-align-left\" data-align=\"left\">Hot hardness and wear resistance<\/td><td class=\"has-text-align-left\" data-align=\"left\">M2<\/td><td class=\"has-text-align-left\" data-align=\"left\">T1<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Lathe tools<\/td><td class=\"has-text-align-left\" data-align=\"left\">Cutting heat and wear<\/td><td class=\"has-text-align-left\" data-align=\"left\">Hot hardness<\/td><td class=\"has-text-align-left\" data-align=\"left\">M2<\/td><td class=\"has-text-align-left\" data-align=\"left\">M42<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Planer tools<\/td><td class=\"has-text-align-left\" data-align=\"left\">Cutting wear<\/td><td class=\"has-text-align-left\" data-align=\"left\">Hot hardness and wear resistance<\/td><td class=\"has-text-align-left\" data-align=\"left\">M2<\/td><td class=\"has-text-align-left\" data-align=\"left\">M4<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Shaper tools<\/td><td class=\"has-text-align-left\" data-align=\"left\">Cutting wear<\/td><td class=\"has-text-align-left\" data-align=\"left\">Hot hardness and wear resistance<\/td><td class=\"has-text-align-left\" data-align=\"left\">M2<\/td><td class=\"has-text-align-left\" data-align=\"left\">M4<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Reamers<\/td><td class=\"has-text-align-left\" data-align=\"left\">Cutting accuracy and wear<\/td><td class=\"has-text-align-left\" data-align=\"left\">Wear resistance and hot hardness<\/td><td class=\"has-text-align-left\" data-align=\"left\">M2<\/td><td class=\"has-text-align-left\" data-align=\"left\">M4<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Taps<\/td><td class=\"has-text-align-left\" data-align=\"left\">Thread cutting wear<\/td><td class=\"has-text-align-left\" data-align=\"left\">Wear resistance and hot hardness<\/td><td class=\"has-text-align-left\" data-align=\"left\">O1<\/td><td class=\"has-text-align-left\" data-align=\"left\">M2<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Drills<\/td><td class=\"has-text-align-left\" data-align=\"left\">Cutting heat and edge wear<\/td><td class=\"has-text-align-left\" data-align=\"left\">Hot hardness and wear resistance<\/td><td class=\"has-text-align-left\" data-align=\"left\">M2<\/td><td class=\"has-text-align-left\" data-align=\"left\">M4<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Drill bushings<\/td><td class=\"has-text-align-left\" data-align=\"left\">Wear from repeated drilling<\/td><td class=\"has-text-align-left\" data-align=\"left\">Wear resistance<\/td><td class=\"has-text-align-left\" data-align=\"left\">S5<\/td><td class=\"has-text-align-left\" data-align=\"left\">A2<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Brake dies<\/td><td class=\"has-text-align-left\" data-align=\"left\">Bending pressure<\/td><td class=\"has-text-align-left\" data-align=\"left\">Toughness and wear resistance<\/td><td class=\"has-text-align-left\" data-align=\"left\">4140 HT<\/td><td class=\"has-text-align-left\" data-align=\"left\">A2<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Gripper dies, cold<\/td><td class=\"has-text-align-left\" data-align=\"left\">Holding pressure and wear<\/td><td class=\"has-text-align-left\" data-align=\"left\">Wear resistance and toughness<\/td><td class=\"has-text-align-left\" data-align=\"left\">O1, S7<\/td><td class=\"has-text-align-left\" data-align=\"left\">A2, D2<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Gripper dies, hot<\/td><td class=\"has-text-align-left\" data-align=\"left\">Hot gripping and wear<\/td><td class=\"has-text-align-left\" data-align=\"left\">Hot hardness and toughness<\/td><td class=\"has-text-align-left\" data-align=\"left\">S7, H13<\/td><td class=\"has-text-align-left\" data-align=\"left\">H21<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Swaging dies, cold<\/td><td class=\"has-text-align-left\" data-align=\"left\">Impact and forming pressure<\/td><td class=\"has-text-align-left\" data-align=\"left\">Toughness and wear resistance<\/td><td class=\"has-text-align-left\" data-align=\"left\">S7<\/td><td class=\"has-text-align-left\" data-align=\"left\">D2<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Swaging dies, hot<\/td><td class=\"has-text-align-left\" data-align=\"left\">Heat and impact<\/td><td class=\"has-text-align-left\" data-align=\"left\">Hot hardness and toughness<\/td><td class=\"has-text-align-left\" data-align=\"left\">H13, S7<\/td><td class=\"has-text-align-left\" data-align=\"left\">H21<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Lamination dies<\/td><td class=\"has-text-align-left\" data-align=\"left\">Wear and edge stability<\/td><td class=\"has-text-align-left\" data-align=\"left\">Wear resistance<\/td><td class=\"has-text-align-left\" data-align=\"left\">A2<\/td><td class=\"has-text-align-left\" data-align=\"left\">D2, M2<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Plastic molds<\/td><td class=\"has-text-align-left\" data-align=\"left\">Machining, polishing, mold surface quality<\/td><td class=\"has-text-align-left\" data-align=\"left\">Machinability and polishability<\/td><td class=\"has-text-align-left\" data-align=\"left\"><a href=\"https:\/\/aobosteel.com\/p20-tool-steel\/\">P20<\/a>, H13<\/td><td class=\"has-text-align-left\" data-align=\"left\"><a href=\"https:\/\/aobosteel.com\/420-stainless-steel\/\">420<\/a>, special mold steels<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Impact tools<\/td><td class=\"has-text-align-left\" data-align=\"left\">Repeated shock<\/td><td class=\"has-text-align-left\" data-align=\"left\">Toughness<\/td><td class=\"has-text-align-left\" data-align=\"left\">S5<\/td><td class=\"has-text-align-left\" data-align=\"left\">S7<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Battering tools, cold<\/td><td class=\"has-text-align-left\" data-align=\"left\">Shock and breakage<\/td><td class=\"has-text-align-left\" data-align=\"left\">Toughness<\/td><td class=\"has-text-align-left\" data-align=\"left\">S5<\/td><td class=\"has-text-align-left\" data-align=\"left\">S7<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Blacksmith tools<\/td><td class=\"has-text-align-left\" data-align=\"left\">Impact and heat<\/td><td class=\"has-text-align-left\" data-align=\"left\">Toughness<\/td><td class=\"has-text-align-left\" data-align=\"left\">S5<\/td><td class=\"has-text-align-left\" data-align=\"left\">S7<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Boiler-shop tools<\/td><td class=\"has-text-align-left\" data-align=\"left\">Impact work<\/td><td class=\"has-text-align-left\" data-align=\"left\">Toughness<\/td><td class=\"has-text-align-left\" data-align=\"left\">S5<\/td><td class=\"has-text-align-left\" data-align=\"left\">S7<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Chisels, cold working<\/td><td class=\"has-text-align-left\" data-align=\"left\">Impact and edge chipping<\/td><td class=\"has-text-align-left\" data-align=\"left\">Toughness<\/td><td class=\"has-text-align-left\" data-align=\"left\">S5<\/td><td class=\"has-text-align-left\" data-align=\"left\">S7<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Chisels, hot working<\/td><td class=\"has-text-align-left\" data-align=\"left\">Heat and impact<\/td><td class=\"has-text-align-left\" data-align=\"left\">Toughness and hot hardness<\/td><td class=\"has-text-align-left\" data-align=\"left\">S7<\/td><td class=\"has-text-align-left\" data-align=\"left\">M2<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Pneumatic tools<\/td><td class=\"has-text-align-left\" data-align=\"left\">Repeated impact<\/td><td class=\"has-text-align-left\" data-align=\"left\">Toughness<\/td><td class=\"has-text-align-left\" data-align=\"left\">S5<\/td><td class=\"has-text-align-left\" data-align=\"left\">S7<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Concrete breakers<\/td><td class=\"has-text-align-left\" data-align=\"left\">Severe impact<\/td><td class=\"has-text-align-left\" data-align=\"left\">Toughness<\/td><td class=\"has-text-align-left\" data-align=\"left\">S5<\/td><td class=\"has-text-align-left\" data-align=\"left\">S7<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Screwdriver bits<\/td><td class=\"has-text-align-left\" data-align=\"left\">Torsion and impact<\/td><td class=\"has-text-align-left\" data-align=\"left\">Toughness<\/td><td class=\"has-text-align-left\" data-align=\"left\">S5<\/td><td class=\"has-text-align-left\" data-align=\"left\">S7<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Arbors<\/td><td class=\"has-text-align-left\" data-align=\"left\">Support and wear<\/td><td class=\"has-text-align-left\" data-align=\"left\">Toughness and dimensional stability<\/td><td class=\"has-text-align-left\" data-align=\"left\">O1, O6<\/td><td class=\"has-text-align-left\" data-align=\"left\">A2, D2<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Collets<\/td><td class=\"has-text-align-left\" data-align=\"left\">Holding pressure and wear<\/td><td class=\"has-text-align-left\" data-align=\"left\">Toughness and wear resistance<\/td><td class=\"has-text-align-left\" data-align=\"left\">O1<\/td><td class=\"has-text-align-left\" data-align=\"left\">S5, S7<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Chuck jaws<\/td><td class=\"has-text-align-left\" data-align=\"left\">Holding pressure and impact<\/td><td class=\"has-text-align-left\" data-align=\"left\">Toughness<\/td><td class=\"has-text-align-left\" data-align=\"left\">S5<\/td><td class=\"has-text-align-left\" data-align=\"left\">S7<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">3. Selection notes<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">How to read the failure mode before changing a grade.<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">Selection note<\/th><th class=\"has-text-align-left\" data-align=\"left\">Meaning<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-left\" data-align=\"left\">If the tool wears gradually, start by comparing wear-resistant grades.<\/td><td class=\"has-text-align-left\" data-align=\"left\">D2, M2, M4, and related grades are common starting points for abrasive wear.<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">If the tool chips, cracks, or breaks suddenly, check toughness before increasing hardness.<\/td><td class=\"has-text-align-left\" data-align=\"left\">S7, S5, H13, and other tougher grades may be more suitable for shock-loaded tools.<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">If the tool works under heat, room-temperature hardness is not enough.<\/td><td class=\"has-text-align-left\" data-align=\"left\">Hot hardness and resistance to softening become more important.<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">If the tool requires frequent sharpening, grindability affects maintenance cost.<\/td><td class=\"has-text-align-left\" data-align=\"left\">High-wear-resistance grades may be harder to grind.<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">If the tool is large or complex, heat-treatment distortion must be considered.<\/td><td class=\"has-text-align-left\" data-align=\"left\">Air-hardening grades are often used where dimensional stability is important.<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">If the production run is short, the highest-performance grade may not be economical.<\/td><td class=\"has-text-align-left\" data-align=\"left\">Machinability and material cost may be more important for short-run tooling.<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">If the production run is long, higher wear resistance may reduce total cost.<\/td><td class=\"has-text-align-left\" data-align=\"left\">More expensive grades can be justified when they reduce downtime and replacement frequency.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">4. Final technical check before grade selection<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Confirm these nine points with the tool shop and heat treater before the grade is fixed.<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">Check item<\/th><th class=\"has-text-align-left\" data-align=\"left\">Confirm before selection<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-left\" data-align=\"left\">Tool function<\/td><td class=\"has-text-align-left\" data-align=\"left\">Cutting, shearing, forming, drawing, extrusion, rolling, impact, molding<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Working temperature<\/td><td class=\"has-text-align-left\" data-align=\"left\">Room temperature, warm work, hot work<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Main failure mode<\/td><td class=\"has-text-align-left\" data-align=\"left\">Wear, chipping, cracking, softening, deformation, distortion<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Load level<\/td><td class=\"has-text-align-left\" data-align=\"left\">Light, medium, heavy, shock-loaded<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Production volume<\/td><td class=\"has-text-align-left\" data-align=\"left\">Short run, medium run, long run<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Section size<\/td><td class=\"has-text-align-left\" data-align=\"left\">Small tool, thick section, large die block<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Heat treatment target<\/td><td class=\"has-text-align-left\" data-align=\"left\">Required hardness, toughness, distortion control<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Finishing requirement<\/td><td class=\"has-text-align-left\" data-align=\"left\">Machining, grinding, polishing, sharpening<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Cost target<\/td><td class=\"has-text-align-left\" data-align=\"left\">Material cost, machining cost, maintenance cost, cost per part<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Related reference pages<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">General properties of tool steels &middot; <a href=\"https:\/\/aobosteel.com\/tool-steel-composition-chart\/\">Tool steel composition chart<\/a> &middot; <a href=\"https:\/\/aobosteel.com\/tool-steel-equivalent-grades\/\">Grade comparison and equivalents<\/a> &middot; <a href=\"https:\/\/aobosteel.com\/tool-steel-hot-hardness-chart\/\">Hot hardness chart<\/a> &middot; <a href=\"https:\/\/aobosteel.com\/tool-steel-hardening-tempering-chart\/\">Hardening and tempering temperatures<\/a> &middot; <a href=\"https:\/\/aobosteel.com\/tool-steel-machinability-rating-chart\/\">Machinability ratings<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Grade families:<\/strong> <a href=\"https:\/\/aobosteel.com\/cold-work-tool-steels\/\">cold-work tool steels<\/a> &middot; <a href=\"https:\/\/aobosteel.com\/hot-work-tool-steels\/\">hot-work tool steels<\/a> &middot; <a href=\"https:\/\/aobosteel.com\/high-speed-steels\/\">high-speed steels<\/a> &middot; <a href=\"https:\/\/aobosteel.com\/plastic-mold-steels\/\">plastic mold steels<\/a> &middot; <a href=\"https:\/\/aobosteel.com\/tool-steel-material-finder\/\">tool steel material finder<\/a> &middot; <a href=\"https:\/\/aobosteel.com\/tool-steels\/\">tool steel catalog<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Property ratings are relative comparison values for selection, not mechanical test results. Application notes are a starting reference only: final performance depends on steel quality, heat treatment, section size, tool design and service conditions. Verify the grade and the heat-treatment procedure before production.<\/p>\n\n\n","protected":false},"excerpt":{"rendered":"<p>How to Select Tool Steels A practical route from application to grade. Relative property ratings for ten common tool steels, a selection table by application and working condition, and the technical checks to run before a grade is fixed. Use it as a starting point, then confirm with your heat treater and a service trial. [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":15586,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"normal-width-container","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"disabled","ast-breadcrumbs-content":"","ast-featured-img":"disabled","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"class_list":["post-9531","page","type-page","status-publish","has-post-thumbnail","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.7 (Yoast SEO v28.7) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>How to Select Tool Steels by Application and Properties - AoboSteel<\/title>\n<meta name=\"description\" content=\"Learn how to select tool steels by application, working condition, wear resistance, toughness, machinability, grindability, and suitable grade recommendations.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/aobosteel.com\/ko\/how-to-select-tool-steels\/\" \/>\n<meta property=\"og:locale\" content=\"ko_KR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Still confused about selecition of tool steels? Let me tell you the answer.\" \/>\n<meta property=\"og:description\" content=\"The selection of tool steel has always been a perplexing issue for many factories. Aobo Steel provides the most comprehensive and authoritative technical documentation.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/aobosteel.com\/ko\/how-to-select-tool-steels\/\" \/>\n<meta property=\"og:site_name\" content=\"AoboSteel\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/profile.php?id=61565368220197\" \/>\n<meta property=\"article:modified_time\" content=\"2026-10-22T03:21:04+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/how-to-select-tool-steel.avif\" \/>\n\t<meta property=\"og:image:width\" content=\"1254\" \/>\n\t<meta property=\"og:image:height\" content=\"1254\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:title\" content=\"How to Select Tool Steels by Application and Properties\" \/>\n<meta name=\"twitter:label1\" content=\"\uc608\uc0c1 \ub418\ub294 \ud310\ub3c5 \uc2dc\uac04\" \/>\n\t<meta name=\"twitter:data1\" content=\"8\ubd84\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"TechArticle\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/how-to-select-tool-steels\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/how-to-select-tool-steels\\\/\"},\"author\":{\"name\":\"Evan\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/#\\\/schema\\\/person\\\/96118415c30ca6bb52eaf1127b052ef7\"},\"headline\":\"How to Select Tool Steels by Application and Properties\",\"datePublished\":\"2025-08-05T05:58:09+00:00\",\"dateModified\":\"2026-10-22T03:21:04+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/how-to-select-tool-steels\\\/\"},\"wordCount\":1459,\"publisher\":{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/how-to-select-tool-steels\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/aobosteel.com\\\/wp-content\\\/uploads\\\/2026\\\/05\\\/how-to-select-tool-steel.avif\",\"inLanguage\":\"ko-KR\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/how-to-select-tool-steels\\\/\",\"url\":\"https:\\\/\\\/aobosteel.com\\\/how-to-select-tool-steels\\\/\",\"name\":\"How to Select Tool Steels by Application and Properties - AoboSteel\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/how-to-select-tool-steels\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/how-to-select-tool-steels\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/aobosteel.com\\\/wp-content\\\/uploads\\\/2026\\\/05\\\/how-to-select-tool-steel.avif\",\"datePublished\":\"2025-08-05T05:58:09+00:00\",\"dateModified\":\"2026-10-22T03:21:04+00:00\",\"description\":\"Learn how to select tool steels by application, working condition, wear resistance, toughness, machinability, grindability, and suitable grade recommendations.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/how-to-select-tool-steels\\\/#breadcrumb\"},\"inLanguage\":\"ko-KR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/aobosteel.com\\\/how-to-select-tool-steels\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"ko-KR\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/how-to-select-tool-steels\\\/#primaryimage\",\"url\":\"https:\\\/\\\/aobosteel.com\\\/wp-content\\\/uploads\\\/2026\\\/05\\\/how-to-select-tool-steel.avif\",\"contentUrl\":\"https:\\\/\\\/aobosteel.com\\\/wp-content\\\/uploads\\\/2026\\\/05\\\/how-to-select-tool-steel.avif\",\"width\":1254,\"height\":1254},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/how-to-select-tool-steels\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u9996\u9875\",\"item\":\"https:\\\/\\\/aobosteel.com\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"How to Select Tool Steels by Application and Properties\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/#website\",\"url\":\"https:\\\/\\\/aobosteel.com\\\/\",\"name\":\"AoboSteel\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/aobosteel.com\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"ko-KR\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/#organization\",\"name\":\"AoboSteel\",\"url\":\"https:\\\/\\\/aobosteel.com\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"ko-KR\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/aobosteel.com\\\/wp-content\\\/uploads\\\/2025\\\/01\\\/cropped-aobo-steel-1.avif\",\"contentUrl\":\"https:\\\/\\\/aobosteel.com\\\/wp-content\\\/uploads\\\/2025\\\/01\\\/cropped-aobo-steel-1.avif\",\"width\":1052,\"height\":592,\"caption\":\"AoboSteel\"},\"image\":{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/#\\\/schema\\\/logo\\\/image\\\/\"},\"sameAs\":[\"https:\\\/\\\/www.facebook.com\\\/profile.php?id=61565368220197\",\"https:\\\/\\\/www.linkedin.com\\\/in\\\/aobosteel-evan\\\/\"]},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/#\\\/schema\\\/person\\\/96118415c30ca6bb52eaf1127b052ef7\",\"name\":\"Evan\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"ko-KR\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/8e402f2e6f36093f0bf1855dbf79269cde23cd659c44eefdd7ecf7ff9c05786f?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/8e402f2e6f36093f0bf1855dbf79269cde23cd659c44eefdd7ecf7ff9c05786f?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/8e402f2e6f36093f0bf1855dbf79269cde23cd659c44eefdd7ecf7ff9c05786f?s=96&d=mm&r=g\",\"caption\":\"Evan\"},\"sameAs\":[\"http:\\\/\\\/www.aobosteel.com\",\"https:\\\/\\\/www.facebook.com\\\/profile.php?id=61565368220197\",\"https:\\\/\\\/www.instagram.com\\\/aobosteel\\\/\",\"https:\\\/\\\/www.linkedin.com\\\/in\\\/aobosteel-evan\\\/\",\"https:\\\/\\\/x.com\\\/AobosteelEvan\",\"https:\\\/\\\/www.youtube.com\\\/@aobosteel\"],\"url\":\"https:\\\/\\\/aobosteel.com\\\/ko\\\/blog\\\/author\\\/admin\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"\uc6a9\ub3c4 \ubc0f \ud2b9\uc131\uc5d0 \ub530\ub978 \uacf5\uad6c\uac15 \uc120\ud0dd \ubc29\ubc95 - AoboSteel","description":"\uc6a9\ub3c4, \uc791\uc5c5 \uc870\uac74, \ub0b4\ub9c8\ubaa8\uc131, \uc778\uc131, \uac00\uacf5\uc131, \uc5f0\uc0ad\uc131 \ubc0f \uc801\ud569\ud55c \ub4f1\uae09 \ucd94\ucc9c\uc744 \ud1b5\ud574 \uacf5\uad6c\uac15\uc744 \uc120\ud0dd\ud558\ub294 \ubc29\ubc95\uc744 \uc54c\uc544\ubcf4\uc138\uc694.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/aobosteel.com\/ko\/how-to-select-tool-steels\/","og_locale":"ko_KR","og_type":"article","og_title":"Still confused about selecition of tool steels? Let me tell you the answer.","og_description":"The selection of tool steel has always been a perplexing issue for many factories. Aobo Steel provides the most comprehensive and authoritative technical documentation.","og_url":"https:\/\/aobosteel.com\/ko\/how-to-select-tool-steels\/","og_site_name":"AoboSteel","article_publisher":"https:\/\/www.facebook.com\/profile.php?id=61565368220197","article_modified_time":"2026-10-22T03:21:04+00:00","og_image":[{"width":1254,"height":1254,"url":"https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/how-to-select-tool-steel.avif","type":"image\/png"}],"twitter_card":"summary_large_image","twitter_title":"How to Select Tool Steels by Application and Properties","twitter_misc":{"\uc608\uc0c1 \ub418\ub294 \ud310\ub3c5 \uc2dc\uac04":"8\ubd84"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"TechArticle","@id":"https:\/\/aobosteel.com\/how-to-select-tool-steels\/#article","isPartOf":{"@id":"https:\/\/aobosteel.com\/how-to-select-tool-steels\/"},"author":{"name":"Evan","@id":"https:\/\/aobosteel.com\/#\/schema\/person\/96118415c30ca6bb52eaf1127b052ef7"},"headline":"How to Select Tool Steels by Application and Properties","datePublished":"2025-08-05T05:58:09+00:00","dateModified":"2026-10-22T03:21:04+00:00","mainEntityOfPage":{"@id":"https:\/\/aobosteel.com\/how-to-select-tool-steels\/"},"wordCount":1459,"publisher":{"@id":"https:\/\/aobosteel.com\/#organization"},"image":{"@id":"https:\/\/aobosteel.com\/how-to-select-tool-steels\/#primaryimage"},"thumbnailUrl":"https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/how-to-select-tool-steel.avif","inLanguage":"ko-KR"},{"@type":"WebPage","@id":"https:\/\/aobosteel.com\/how-to-select-tool-steels\/","url":"https:\/\/aobosteel.com\/how-to-select-tool-steels\/","name":"\uc6a9\ub3c4 \ubc0f \ud2b9\uc131\uc5d0 \ub530\ub978 \uacf5\uad6c\uac15 \uc120\ud0dd \ubc29\ubc95 - AoboSteel","isPartOf":{"@id":"https:\/\/aobosteel.com\/#website"},"primaryImageOfPage":{"@id":"https:\/\/aobosteel.com\/how-to-select-tool-steels\/#primaryimage"},"image":{"@id":"https:\/\/aobosteel.com\/how-to-select-tool-steels\/#primaryimage"},"thumbnailUrl":"https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/how-to-select-tool-steel.avif","datePublished":"2025-08-05T05:58:09+00:00","dateModified":"2026-10-22T03:21:04+00:00","description":"\uc6a9\ub3c4, \uc791\uc5c5 \uc870\uac74, \ub0b4\ub9c8\ubaa8\uc131, \uc778\uc131, \uac00\uacf5\uc131, \uc5f0\uc0ad\uc131 \ubc0f \uc801\ud569\ud55c \ub4f1\uae09 \ucd94\ucc9c\uc744 \ud1b5\ud574 \uacf5\uad6c\uac15\uc744 \uc120\ud0dd\ud558\ub294 \ubc29\ubc95\uc744 \uc54c\uc544\ubcf4\uc138\uc694.","breadcrumb":{"@id":"https:\/\/aobosteel.com\/how-to-select-tool-steels\/#breadcrumb"},"inLanguage":"ko-KR","potentialAction":[{"@type":"ReadAction","target":["https:\/\/aobosteel.com\/how-to-select-tool-steels\/"]}]},{"@type":"ImageObject","inLanguage":"ko-KR","@id":"https:\/\/aobosteel.com\/how-to-select-tool-steels\/#primaryimage","url":"https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/how-to-select-tool-steel.avif","contentUrl":"https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/how-to-select-tool-steel.avif","width":1254,"height":1254},{"@type":"BreadcrumbList","@id":"https:\/\/aobosteel.com\/how-to-select-tool-steels\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"\u9996\u9875","item":"https:\/\/aobosteel.com\/"},{"@type":"ListItem","position":2,"name":"How to Select Tool Steels by Application and Properties"}]},{"@type":"WebSite","@id":"https:\/\/aobosteel.com\/#website","url":"https:\/\/aobosteel.com\/","name":"\uc544\uc624\ubcf4\uc2a4\ud2f8","description":"","publisher":{"@id":"https:\/\/aobosteel.com\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/aobosteel.com\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"ko-KR"},{"@type":"Organization","@id":"https:\/\/aobosteel.com\/#organization","name":"\uc544\uc624\ubcf4\uc2a4\ud2f8","url":"https:\/\/aobosteel.com\/","logo":{"@type":"ImageObject","inLanguage":"ko-KR","@id":"https:\/\/aobosteel.com\/#\/schema\/logo\/image\/","url":"https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/01\/cropped-aobo-steel-1.avif","contentUrl":"https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/01\/cropped-aobo-steel-1.avif","width":1052,"height":592,"caption":"AoboSteel"},"image":{"@id":"https:\/\/aobosteel.com\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/profile.php?id=61565368220197","https:\/\/www.linkedin.com\/in\/aobosteel-evan\/"]},{"@type":"Person","@id":"https:\/\/aobosteel.com\/#\/schema\/person\/96118415c30ca6bb52eaf1127b052ef7","name":"\uc5d0\ubc18","image":{"@type":"ImageObject","inLanguage":"ko-KR","@id":"https:\/\/secure.gravatar.com\/avatar\/8e402f2e6f36093f0bf1855dbf79269cde23cd659c44eefdd7ecf7ff9c05786f?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/8e402f2e6f36093f0bf1855dbf79269cde23cd659c44eefdd7ecf7ff9c05786f?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/8e402f2e6f36093f0bf1855dbf79269cde23cd659c44eefdd7ecf7ff9c05786f?s=96&d=mm&r=g","caption":"Evan"},"sameAs":["http:\/\/www.aobosteel.com","https:\/\/www.facebook.com\/profile.php?id=61565368220197","https:\/\/www.instagram.com\/aobosteel\/","https:\/\/www.linkedin.com\/in\/aobosteel-evan\/","https:\/\/x.com\/AobosteelEvan","https:\/\/www.youtube.com\/@aobosteel"],"url":"https:\/\/aobosteel.com\/ko\/blog\/author\/admin\/"}]}},"uagb_featured_image_src":{"full":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/how-to-select-tool-steel.avif",1254,1254,false],"thumbnail":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/how-to-select-tool-steel-150x150.avif",150,150,true],"medium":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/how-to-select-tool-steel-300x300.avif",300,300,true],"medium_large":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/how-to-select-tool-steel-768x768.avif",768,768,true],"large":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/how-to-select-tool-steel-1024x1024.avif",1024,1024,true],"1536x1536":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/how-to-select-tool-steel.avif",1254,1254,false],"2048x2048":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/how-to-select-tool-steel.avif",1254,1254,false],"trp-custom-language-flag":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/how-to-select-tool-steel-12x12.avif",12,12,true]},"uagb_author_info":{"display_name":"Evan","author_link":"https:\/\/aobosteel.com\/ko\/blog\/author\/admin\/"},"uagb_comment_info":0,"uagb_excerpt":"How to Select Tool Steels A practical route from application to grade. Relative property ratings for ten common tool steels, a selection table by application and working condition, and the technical checks to run before a grade is fixed. Use it as a starting point, then confirm with your heat treater and a service trial.&hellip;","rttpg_featured_image_url":{"full":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/how-to-select-tool-steel.avif",1254,1254,false],"landscape":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/how-to-select-tool-steel.avif",1254,1254,false],"portraits":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/how-to-select-tool-steel.avif",1254,1254,false],"thumbnail":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/how-to-select-tool-steel-150x150.avif",150,150,true],"medium":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/how-to-select-tool-steel-300x300.avif",300,300,true],"large":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/how-to-select-tool-steel-1024x1024.avif",1024,1024,true],"1536x1536":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/how-to-select-tool-steel.avif",1254,1254,false],"2048x2048":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/how-to-select-tool-steel.avif",1254,1254,false],"trp-custom-language-flag":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/how-to-select-tool-steel-12x12.avif",12,12,true]},"rttpg_author":{"display_name":"Evan","author_link":"https:\/\/aobosteel.com\/ko\/blog\/author\/admin\/"},"rttpg_comment":0,"rttpg_category":null,"rttpg_excerpt":"How to Select Tool Steels A practical route from application to grade. Relative property ratings for ten common tool steels, a selection table by application and working condition, and the technical checks to run before a grade is fixed. Use it as a starting point, then confirm with your heat treater and a service trial.&hellip;","_links":{"self":[{"href":"https:\/\/aobosteel.com\/ko\/wp-json\/wp\/v2\/pages\/9531","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/aobosteel.com\/ko\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/aobosteel.com\/ko\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/aobosteel.com\/ko\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/aobosteel.com\/ko\/wp-json\/wp\/v2\/comments?post=9531"}],"version-history":[{"count":6,"href":"https:\/\/aobosteel.com\/ko\/wp-json\/wp\/v2\/pages\/9531\/revisions"}],"predecessor-version":[{"id":24035,"href":"https:\/\/aobosteel.com\/ko\/wp-json\/wp\/v2\/pages\/9531\/revisions\/24035"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/aobosteel.com\/ko\/wp-json\/wp\/v2\/media\/15586"}],"wp:attachment":[{"href":"https:\/\/aobosteel.com\/ko\/wp-json\/wp\/v2\/media?parent=9531"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}