Processing & Service Characteristics of Tool Steels | Grade Comparison<\/title>\n<meta name=\"description\" content=\"Comparative ratings for decarburization resistance, hardening response, distortion, cracking, hardness, machinability, toughness, wear and softening resistance of tool steels.\">\n<style>\n .aobo-ht-ref {\n --aobo-accent: #2563eb;\n --aobo-accent-dark: #1e1e2e;\n --aobo-blue: #0c56d0;\n --aobo-blue-dark: #073b91;\n --aobo-text: #333;\n --aobo-muted: #888;\n --aobo-border: #e5e7eb;\n --aobo-border-dark: #ddd;\n --aobo-stripe: #f7f7f9;\n --aobo-hover: #e8f0fe;\n --aobo-radius: 8px;\n --aobo-radius-sm: 6px;\n --aobo-card-bg: #fff;\n color: var(--aobo-text);\n background: transparent;\n padding: 0;\n box-sizing: border-box;\n font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, \"Helvetica Neue\", Arial, sans-serif;\n line-height: 1.6;\n }\n\n .aobo-ht-ref * { box-sizing: border-box; }\n\n .aobo-wrap { max-width: 1160px; margin: 0 auto; }\n\n .aobo-hero {\n background: #fff;\n border: 1px solid var(--aobo-border);\n border-radius: var(--aobo-radius);\n overflow: hidden;\n }\n\n .aobo-hero-top {\n padding: 1.5em;\n background: var(--aobo-stripe);\n border-bottom: 1px solid var(--aobo-border);\n }\n\n .aobo-kicker {\n display: inline-flex;\n align-items: center;\n gap: 6px;\n color: var(--aobo-accent);\n background: var(--aobo-hover);\n border: 1px solid var(--aobo-border);\n border-radius: var(--aobo-radius-sm);\n padding: 4px 8px;\n font-size: .85em;\n font-weight: 600;\n margin-bottom: .8em;\n }\n\n .aobo-kicker span {\n width: 6px; 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}\n .aobo-control-bar { grid-template-columns: 1fr; }\n .aobo-cta { grid-template-columns: 1fr; }\n .aobo-cta-actions { justify-content: flex-start; }\n .aobo-hero h1 { font-size: 1.5rem; }\n }\n\n @media (max-width: 520px) {\n .aobo-hero-top, .aobo-tool-area, .aobo-disclaimer, .aobo-cta { padding: .8em; }\n .aobo-ht-table { font-size: .82em; }\n .aobo-ht-table thead th, .aobo-ht-table tbody td { padding: .4em .4em; }\n }\n<\/style>\n<\/head>\n<body>\n<section class=\"aobo-ht-ref\" id=\"aoboHtRef\">\n <div class=\"aobo-wrap\">\n <div class=\"aobo-hero\">\n <div class=\"aobo-hero-top\">\n <div class=\"aobo-kicker\"><span><\/span>Tool Steel Grade Comparison<\/div>\n <h1>Processing & Service Characteristics of Tool Steels<\/h1>\n <p>Comparative ratings for decarburization resistance, hardening response, distortion, cracking resistance, hardness, machinability, toughness, wear resistance and softening resistance across all major tool steel grades. Search by grade name to compare properties side by side.<\/p>\n <\/div>\n\n <div class=\"aobo-tool-area\">\n \n <div class=\"aobo-control-bar\">\n <div class=\"aobo-search-box\">\n <input type=\"text\" id=\"aoboSearchInput\" placeholder=\"Search grade (e.g. H13, D2, M2, S7...)\">\n <\/div>\n <button class=\"aobo-reset-btn\" id=\"aoboResetBtn\">Reset<\/button>\n <\/div>\n\n \n <div class=\"aobo-rating-legend\">\n <span class=\"aobo-rl-label\">Rating scale:<\/span>\n <span class=\"aobo-rating r-lowest\">Lowest<\/span>\n <span class=\"aobo-rating r-low\">Low<\/span>\n <span class=\"aobo-rating r-lowmed\">Low to medium<\/span>\n <span class=\"aobo-rating r-medium\">Medium<\/span>\n <span class=\"aobo-rating r-medhigh\">Medium to high<\/span>\n <span class=\"aobo-rating r-high\">High<\/span>\n <span class=\"aobo-rating r-vhigh\">Very high<\/span>\n <span class=\"aobo-rating r-highest\">Highest<\/span>\n <\/div>\n\n \n <div class=\"aobo-no-results\" id=\"aoboNoResults\">No matching grade found. Try a different search term.<\/div>\n\n \n <div id=\"aoboTableContainer\"><\/div>\n <\/div>\n <\/div>\n\n <div class=\"aobo-cta\">\n <div>\n <h3>Need tool steel supply for your heat treatment shop?<\/h3>\n <p>Aobo Steel supplies tool steel and alloy steel in annealed or soft condition for distributors, stockists and industrial projects. Share the grade, size, quantity, tolerance and destination to receive a practical supply suggestion.<\/p>\n <\/div>\n <div class=\"aobo-cta-actions\">\n <a class=\"aobo-btn aobo-btn-primary popmake-16052\" href=\"javascript:void(0);\">Open Contact Form<\/a>\n <a class=\"aobo-btn aobo-btn-whatsapp\" href=\"https:\/\/wa.me\/8618062945370\" target=\"_blank\" rel=\"noopener\">Chat on WhatsApp<\/a>\n <\/div>\n <\/div>\n\n <p class=\"aobo-source\">Data source: ASM Handbook, Wrought Tool Steels (revised by Alan M. Bayer, Teledyne Vasco, and Lee R. Walton, Latrobe Steel Company). Table 10. Data compiled from public references and industry standards.<\/p>\n <\/div>\n<\/section>\n\n<script>\n(function () {\n \/* Rating class mapping *\/\n function rc(val) {\n if (!val || val === \"\\u2014\") return \"r-dash\";\n var v = val.toLowerCase();\n if (v === \"highest\") return \"r-highest\";\n if (v === \"very high\") return \"r-vhigh\";\n if (v === \"high\") return \"r-high\";\n if (v === \"medium to high\") return \"r-medhigh\";\n if (v === \"medium\") return \"r-medium\";\n if (v === \"low to medium\") return \"r-lowmed\";\n if (v === \"low\") return \"r-low\";\n if (v === \"lowest\") return \"r-lowest\";\n return \"r-medium\";\n }\n\n function badge(val) {\n if (!val || val === \"\\u2014\") return '<span class=\"r-dash\">\\u2014<\/span>';\n return '<span class=\"aobo-rating ' + rc(val) + '\">' + val + '<\/span>';\n }\n\n var tableData = [\n {\n category: \"Molybdenum High-Speed Steels\",\n rows: [\n { grade: \"M1\", decarb: \"Low\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"Medium\", hardness: \"60-65\", machinability: \"Medium\", toughness: \"Low\", wear: \"Very high\", softening: \"Very high\" },\n { grade: \"M2\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"Medium\", hardness: \"60-65\", machinability: \"Medium\", toughness: \"Low\", wear: \"Very high\", softening: \"Very high\" },\n { grade: \"M3 (class 1 and 2)\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"Medium\", hardness: \"61-66\", machinability: \"Medium\", toughness: \"Low\", wear: \"Very high\", softening: \"Very high\" },\n { grade: \"M4\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"Medium\", hardness: \"61-66\", machinability: \"Low to medium\", toughness: \"Low\", wear: \"Very high\", softening: \"Highest\" },\n { grade: \"M7\", decarb: \"Low\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"Medium\", hardness: \"61-66\", machinability: \"Medium\", toughness: \"Low\", wear: \"Very high\", softening: \"Very high\" },\n { grade: \"M10\", decarb: \"Low\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"Medium\", hardness: \"60-65\", machinability: \"Medium\", toughness: \"Low\", wear: \"Very high\", softening: \"Very high\" },\n { grade: \"M30\", decarb: \"Low\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"Medium\", hardness: \"60-65\", machinability: \"Medium\", toughness: \"Low\", wear: \"Highest\", softening: \"Very high\" },\n { grade: \"M33\", decarb: \"Low\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"Medium\", hardness: \"60-65\", machinability: \"Medium\", toughness: \"Low\", wear: \"Highest\", softening: \"Very high\" },\n { grade: \"M34\", decarb: \"Low\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"Medium\", hardness: \"60-65\", machinability: \"Medium\", toughness: \"Low\", wear: \"Highest\", softening: \"Very high\" },\n { grade: \"M35\", decarb: \"Low\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"Medium\", hardness: \"60-65\", machinability: \"Medium\", toughness: \"Low\", wear: \"Highest\", softening: \"Very high\" },\n { grade: \"M36\", decarb: \"Low\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"Medium\", hardness: \"60-65\", machinability: \"Medium\", toughness: \"Low\", wear: \"Highest\", softening: \"Very high\" },\n { grade: \"M41\", decarb: \"Low\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"Medium\", hardness: \"65-70\", machinability: \"Medium\", toughness: \"Low\", wear: \"Highest\", softening: \"Very high\" },\n { grade: \"M42\", decarb: \"Low\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"Medium\", hardness: \"65-70\", machinability: \"Medium\", toughness: \"Low\", wear: \"Highest\", softening: \"Very high\" },\n { grade: \"M43\", decarb: \"Low\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"Medium\", hardness: \"65-70\", machinability: \"Medium\", toughness: \"Low\", wear: \"Highest\", softening: \"Very high\" },\n { grade: \"M44\", decarb: \"Low\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"Medium\", hardness: \"62-70\", machinability: \"Medium\", toughness: \"Low\", wear: \"Highest\", softening: \"Very high\" },\n { grade: \"M46\", decarb: \"Low\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"Medium\", hardness: \"67-69\", machinability: \"Medium\", toughness: \"Low\", wear: \"Highest\", softening: \"Very high\" },\n { grade: \"M47\", decarb: \"Low\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"Medium\", hardness: \"65-70\", machinability: \"Medium\", toughness: \"Low\", wear: \"Highest\", softening: \"Very high\" },\n { grade: \"M48\", decarb: \"Low\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"Medium\", hardness: \"65-70\", machinability: \"Low\", toughness: \"Low\", wear: \"Highest\", softening: \"Highest\" },\n { grade: \"M62\", decarb: \"Low\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"Medium\", hardness: \"62-68\", machinability: \"Medium\", toughness: \"Low\", wear: \"Highest\", softening: \"Very high\" }\n ]\n },\n {\n category: \"Tungsten High-Speed Steels\",\n rows: [\n { grade: \"T1\", decarb: \"High\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"High\", hardness: \"60-65\", machinability: \"Medium\", toughness: \"Low\", wear: \"Very high\", softening: \"Very high\" },\n { grade: \"T2\", decarb: \"High\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"High\", hardness: \"61-66\", machinability: \"Medium\", toughness: \"Low\", wear: \"Very high\", softening: \"Very high\" },\n { grade: \"T4\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"Medium\", hardness: \"62-66\", machinability: \"Medium\", toughness: \"Low\", wear: \"Highest\", softening: \"Very high\" },\n { grade: \"T5\", decarb: \"Low\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"Medium\", hardness: \"60-65\", machinability: \"Medium\", toughness: \"Low\", wear: \"Highest\", softening: \"Very high\" },\n { grade: \"T6\", decarb: \"Low\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"Medium\", hardness: \"60-65\", machinability: \"Low to medium\", toughness: \"Low\", wear: \"Highest\", softening: \"Very high\" },\n { grade: \"T8\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"Medium\", hardness: \"60-65\", machinability: \"Medium\", toughness: \"Low\", wear: \"Highest\", softening: \"Very high\" },\n { grade: \"T15\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"Medium\", hardness: \"63-68\", machinability: \"Low to medium\", toughness: \"Low\", wear: \"Highest\", softening: \"Highest\" }\n ]\n },\n {\n category: \"Intermediate High-Speed Steels\",\n rows: [\n { grade: \"M50\", decarb: \"Low\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"Medium\", hardness: \"58-63\", machinability: \"Medium\", toughness: \"Low\", wear: \"High\", softening: \"High\" },\n { grade: \"M52\", decarb: \"Low\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"Medium\", hardness: \"58-64\", machinability: \"Medium\", toughness: \"Low\", wear: \"High\", softening: \"High\" }\n ]\n },\n {\n category: \"Chromium Hot-Work Steels\",\n rows: [\n { grade: \"H10\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"Very low\", cracking: \"Highest\", hardness: \"39-56\", machinability: \"Medium to high\", toughness: \"High\", wear: \"High\", softening: \"Medium\" },\n { grade: \"H11\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"Very low\", cracking: \"Highest\", hardness: \"38-54\", machinability: \"Medium to high\", toughness: \"Very high\", wear: \"High\", softening: \"Medium\" },\n { grade: \"H12\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"Very low\", cracking: \"Highest\", hardness: \"38-55\", machinability: \"Medium to high\", toughness: \"Very high\", wear: \"High\", softening: \"Medium\" },\n { grade: \"H13\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"Very low\", cracking: \"Highest\", hardness: \"38-53\", machinability: \"Medium to high\", toughness: \"Very high\", wear: \"High\", softening: \"Medium\" },\n { grade: \"H14\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"Low\", cracking: \"Highest\", hardness: \"40-47\", machinability: \"Medium\", toughness: \"High\", wear: \"High\", softening: \"Medium\" },\n { grade: \"H19\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"A, low; O, medium\", cracking: \"High\", hardness: \"40-57\", machinability: \"Medium\", toughness: \"High\", wear: \"High\", softening: \"Medium to high\" }\n ]\n },\n {\n category: \"Tungsten Hot-Work Steels\",\n rows: [\n { grade: \"H21\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"A, low; O, medium\", cracking: \"High\", hardness: \"36-54\", machinability: \"Medium\", toughness: \"High\", wear: \"High\", softening: \"Medium to high\" },\n { grade: \"H22\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"A, low; O, medium\", cracking: \"High\", hardness: \"39-52\", machinability: \"Medium\", toughness: \"High\", wear: \"High\", softening: \"Medium to high\" },\n { grade: \"H23\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"Medium\", cracking: \"High\", hardness: \"34-47\", machinability: \"Medium\", toughness: \"Medium\", wear: \"Very high\", softening: \"Medium to high\" },\n { grade: \"H24\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"A, low; O, medium\", cracking: \"High\", hardness: \"45-55\", machinability: \"Medium\", toughness: \"Medium\", wear: \"Very high\", softening: \"High\" },\n { grade: \"H25\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"A, low; O, medium\", cracking: \"High\", hardness: \"35-44\", machinability: \"Medium\", toughness: \"High\", wear: \"Very high\", softening: \"Medium\" },\n { grade: \"H26\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"High\", hardness: \"43-58\", machinability: \"Medium\", toughness: \"Medium\", wear: \"Very high\", softening: \"High\" }\n ]\n },\n {\n category: \"Molybdenum Hot-Work Steels\",\n rows: [\n { grade: \"H42\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"Medium\", hardness: \"50-60\", machinability: \"Medium\", toughness: \"Medium\", wear: \"Very high\", softening: \"High\" }\n ]\n },\n {\n category: \"Air-Hardening, Medium-Alloy Cold-Work Steels\",\n rows: [\n { grade: \"A2\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"Lowest\", cracking: \"Highest\", hardness: \"57-62\", machinability: \"Medium\", toughness: \"Medium\", wear: \"High\", softening: \"High\" },\n { grade: \"A3\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"Lowest\", cracking: \"Highest\", hardness: \"57-65\", machinability: \"Medium\", toughness: \"Medium\", wear: \"High\", softening: \"Very high\" },\n { grade: \"A4\", decarb: \"Medium to high\", hardening: \"Deep\", distortion: \"Lowest\", cracking: \"Highest\", hardness: \"54-62\", machinability: \"Low to medium\", toughness: \"Medium\", wear: \"Medium\", softening: \"Medium to high\" },\n { grade: \"A6\", decarb: \"Medium to high\", hardening: \"Deep\", distortion: \"Lowest\", cracking: \"Highest\", hardness: \"54-60\", machinability: \"Low to medium\", toughness: \"Medium\", wear: \"Medium\", softening: \"Medium to high\" },\n { grade: \"A7\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"Lowest\", cracking: \"Highest\", hardness: \"57-67\", machinability: \"Low\", toughness: \"Low\", wear: \"High\", softening: \"Highest\" },\n { grade: \"A8\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"Lowest\", cracking: \"Highest\", hardness: \"50-60\", machinability: \"Medium\", toughness: \"High\", wear: \"High\", softening: \"Medium to high\" },\n { grade: \"A9\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"Lowest\", cracking: \"Highest\", hardness: \"35-56\", machinability: \"Medium\", toughness: \"High\", wear: \"High\", softening: \"Medium to high\" },\n { grade: \"A10\", decarb: \"Medium to high\", hardening: \"Deep\", distortion: \"Lowest\", cracking: \"Highest\", hardness: \"55-62\", machinability: \"Medium to high\", toughness: \"Medium\", wear: \"Medium\", softening: \"High\" }\n ]\n },\n {\n category: \"High-Carbon, High-Chromium Cold-Work Steels\",\n rows: [\n { grade: \"D2\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"Lowest\", cracking: \"Highest\", hardness: \"54-61\", machinability: \"Low\", toughness: \"Low\", wear: \"High\", softening: \"High to very high\" },\n { grade: \"D3\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"Very low\", cracking: \"High\", hardness: \"54-61\", machinability: \"Low\", toughness: \"Low\", wear: \"High\", softening: \"Very high\" },\n { grade: \"D4\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"Lowest\", cracking: \"Highest\", hardness: \"54-61\", machinability: \"Low\", toughness: \"Low\", wear: \"High\", softening: \"Very high\" },\n { grade: \"D5\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"Lowest\", cracking: \"Highest\", hardness: \"54-61\", machinability: \"Low\", toughness: \"Low\", wear: \"High\", softening: \"High to very high\" },\n { grade: \"D7\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"Lowest\", cracking: \"Highest\", hardness: \"58-65\", machinability: \"Low\", toughness: \"Low\", wear: \"High\", softening: \"Highest\" }\n ]\n },\n {\n category: \"Oil-Hardening Cold-Work Steels\",\n rows: [\n { grade: \"O1\", decarb: \"High\", hardening: \"Medium\", distortion: \"Very low\", cracking: \"Very high\", hardness: \"57-62\", machinability: \"High\", toughness: \"Medium\", wear: \"Low\", softening: \"Medium\" },\n { grade: \"O2\", decarb: \"High\", hardening: \"Medium\", distortion: \"Very low\", cracking: \"Very high\", hardness: \"57-62\", machinability: \"High\", toughness: \"Medium\", wear: \"Low\", softening: \"Medium\" },\n { grade: \"O6\", decarb: \"High\", hardening: \"Medium\", distortion: \"Very low\", cracking: \"Very high\", hardness: \"58-63\", machinability: \"Highest\", toughness: \"Medium\", wear: \"Low\", softening: \"Medium\" },\n { grade: \"O7\", decarb: \"High\", hardening: \"Medium\", distortion: \"O, very low; W, high\", cracking: \"W, low; O, very high\", hardness: \"58-64\", machinability: \"High\", toughness: \"Medium\", wear: \"Low\", softening: \"Medium\" }\n ]\n },\n {\n category: \"Shock-Resisting Steels\",\n rows: [\n { grade: \"S1\", decarb: \"Medium\", hardening: \"Medium\", distortion: \"Medium\", cracking: \"High\", hardness: \"40-58\", machinability: \"Medium\", toughness: \"Very high\", wear: \"Medium\", softening: \"Low to medium\" },\n { grade: \"S2\", decarb: \"Low\", hardening: \"Medium\", distortion: \"High\", cracking: \"Low\", hardness: \"50-60\", machinability: \"Medium to high\", toughness: \"Highest\", wear: \"Low\", softening: \"Low to medium\" },\n { grade: \"S5\", decarb: \"Low\", hardening: \"Medium\", distortion: \"Medium\", cracking: \"High\", hardness: \"50-60\", machinability: \"Medium to high\", toughness: \"Highest\", wear: \"Low\", softening: \"Low to medium\" },\n { grade: \"S6\", decarb: \"Low\", hardening: \"Medium\", distortion: \"Medium\", cracking: \"High\", hardness: \"54-56\", machinability: \"Medium\", toughness: \"Very high\", wear: \"Low\", softening: \"Low to medium\" },\n { grade: \"S7\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"A, lowest; O, low\", cracking: \"O, high; A, highest\", hardness: \"45-57\", machinability: \"Medium\", toughness: \"Very high\", wear: \"High\", softening: \"Low to medium\" }\n ]\n },\n {\n category: \"Low-Alloy Special-Purpose Steels\",\n rows: [\n { grade: \"L2\", decarb: \"High\", hardening: \"Medium\", distortion: \"O, medium; W, low\", cracking: \"O, medium; W, high\", hardness: \"45-63\", machinability: \"High\", toughness: \"Very high\", wear: \"Low\", softening: \"Low to medium\" },\n { grade: \"L6\", decarb: \"High\", hardening: \"Medium\", distortion: \"Low\", cracking: \"High\", hardness: \"45-62\", machinability: \"Medium\", toughness: \"Very high\", wear: \"Low\", softening: \"Medium\" }\n ]\n },\n {\n category: \"Low-Carbon Mold Steels\",\n rows: [\n { grade: \"P2\", decarb: \"High\", hardening: \"Medium\", distortion: \"Low\", cracking: \"High\", hardness: \"58-64 (c)\", machinability: \"Medium to high\", toughness: \"High\", wear: \"Low\", softening: \"Medium\" },\n { grade: \"P3\", decarb: \"High\", hardening: \"Medium\", distortion: \"Low\", cracking: \"High\", hardness: \"58-64 (c)\", machinability: \"Medium\", toughness: \"High\", wear: \"Low\", softening: \"Medium\" },\n { grade: \"P4\", decarb: \"High\", hardening: \"High\", distortion: \"Very low\", cracking: \"High\", hardness: \"58-64 (c)\", machinability: \"Low to medium\", toughness: \"High\", wear: \"Medium\", softening: \"High\" },\n { grade: \"P5\", decarb: \"High\", hardening: \"\\u2014\", distortion: \"O, low; W, high\", cracking: \"High\", hardness: \"58-64 (c)\", machinability: \"Medium\", toughness: \"High\", wear: \"Low\", softening: \"Medium\" },\n { grade: \"P6\", decarb: \"High\", hardening: \"\\u2014\", distortion: \"A, very low; O, low\", cracking: \"High\", hardness: \"58-61 (c)\", machinability: \"Medium\", toughness: \"High\", wear: \"Low\", softening: \"Medium\" },\n { grade: \"P20\", decarb: \"High\", hardening: 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resistance across all major tool steel grades. Search by grade name to compare properties side by side. […]<\/p>\n","protected":false},"author":1,"featured_media":17171,"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 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Processing & Service Characteristics Comparison Chart - AoboSteel<\/title>\n<meta name=\"description\" content=\"Compare the processing and service characteristics of tool steels, including hardness, machinability, toughness, wear resistance, distortion, cracking resistance, and hardening response for H13, D2, A2, M2, O1, S7, P20, and more.\" \/>\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\/es\/tool-steel-processing-characteristics\/\" \/>\n<meta property=\"og:locale\" content=\"es_MX\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Tool Steel Processing & Service Characteristics Comparison Chart\" \/>\n<meta property=\"og:description\" content=\"Compare the processing and service characteristics of tool steels, including hardness, machinability, toughness, wear resistance, distortion, cracking resistance, and 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}\n\n \/* CTA *\/\n .aobo-cta {\n margin-top: 1.2em;\n background: linear-gradient(135deg, #073b91 0%, #0c56d0 100%);\n border-radius: var(--aobo-radius);\n padding: 1.2em;\n display: grid;\n grid-template-columns: 1fr auto;\n gap: 1em;\n align-items: center;\n color: #fff;\n box-shadow: 0 18px 45px rgba(12, 86, 208, 0.20);\n }\n\n .aobo-cta h3 { margin: 0 0 .3em; font-size: 1.1em; color: #fff; }\n .aobo-cta p { margin: 0; color: rgba(255,255,255,.92); line-height: 1.58; font-size: .88em; max-width: none; }\n\n .aobo-cta-actions { display: flex; gap: 10px; flex-wrap: wrap; justify-content: flex-end; }\n\n .aobo-btn {\n display: inline-flex;\n align-items: center;\n justify-content: center;\n padding: .55em 1.1em;\n border-radius: 999px;\n font-weight: 700;\n font-size: .88em;\n text-decoration: none;\n white-space: nowrap;\n transition: all 0.2s ease;\n }\n\n .aobo-btn:hover { transform: translateY(-1px); }\n\n .aobo-cta .aobo-btn-primary {\n background: #fff;\n border: 1px solid #fff;\n color: var(--aobo-blue) !important;\n }\n\n .aobo-cta .aobo-btn-primary:hover {\n background: #f0f7ff;\n color: var(--aobo-blue-dark) !important;\n }\n\n .aobo-cta .aobo-btn-whatsapp {\n background: #25D366;\n border: 1px solid #25D366;\n color: #fff !important;\n }\n\n .aobo-cta .aobo-btn-whatsapp:hover {\n background: #1da851;\n border-color: #1da851;\n }\n\n .aobo-source {\n margin-top: .8em;\n color: var(--aobo-muted);\n font-size: .82em;\n line-height: 1.58;\n }\n\n .aobo-no-results {\n display: none;\n border: 1px dashed var(--aobo-border-dark);\n background: #fff;\n border-radius: var(--aobo-radius);\n padding: 1.2em;\n color: var(--aobo-muted);\n text-align: center;\n font-size: .9em;\n }\n\n \/* Mobile *\/\n @media (max-width: 860px) {\n .aobo-hero-top, .aobo-tool-area { padding: 1em; }\n .aobo-control-bar { grid-template-columns: 1fr; }\n .aobo-cta { grid-template-columns: 1fr; }\n .aobo-cta-actions { justify-content: flex-start; }\n .aobo-hero h1 { font-size: 1.5rem; }\n }\n\n @media (max-width: 520px) {\n .aobo-hero-top, .aobo-tool-area, .aobo-disclaimer, .aobo-cta { padding: .8em; }\n .aobo-ht-table { font-size: .82em; }\n .aobo-ht-table thead th, .aobo-ht-table tbody td { padding: .4em .4em; }\n }\n<\/style>\n<\/head>\n<body>\n<section class=\"aobo-ht-ref\" id=\"aoboHtRef\">\n <div class=\"aobo-wrap\">\n <div class=\"aobo-hero\">\n <div class=\"aobo-hero-top\">\n <div class=\"aobo-kicker\"><span><\/span>Tool Steel Grade Comparison<\/div>\n <h1>Processing & Service Characteristics of Tool Steels<\/h1>\n <p>Comparative ratings for decarburization resistance, hardening response, distortion, cracking resistance, hardness, machinability, toughness, wear resistance and softening resistance across all major tool steel grades. Search by grade name to compare properties side by side.<\/p>\n <\/div>\n\n <div class=\"aobo-tool-area\">\n \n <div class=\"aobo-control-bar\">\n <div class=\"aobo-search-box\">\n <input type=\"text\" id=\"aoboSearchInput\" placeholder=\"Search grade (e.g. H13, D2, M2, S7...)\">\n <\/div>\n <button class=\"aobo-reset-btn\" id=\"aoboResetBtn\">Reset<\/button>\n <\/div>\n\n \n <div class=\"aobo-rating-legend\">\n <span class=\"aobo-rl-label\">Rating scale:<\/span>\n <span class=\"aobo-rating r-lowest\">Lowest<\/span>\n <span class=\"aobo-rating r-low\">Low<\/span>\n <span class=\"aobo-rating r-lowmed\">Low to medium<\/span>\n <span class=\"aobo-rating r-medium\">Medium<\/span>\n <span class=\"aobo-rating r-medhigh\">Medium to high<\/span>\n <span class=\"aobo-rating r-high\">High<\/span>\n <span class=\"aobo-rating r-vhigh\">Very high<\/span>\n <span class=\"aobo-rating r-highest\">Highest<\/span>\n <\/div>\n\n \n <div class=\"aobo-no-results\" id=\"aoboNoResults\">No matching grade found. Try a different search term.<\/div>\n\n \n <div id=\"aoboTableContainer\"><\/div>\n <\/div>\n <\/div>\n\n <div class=\"aobo-cta\">\n <div>\n <h3>Need tool steel supply for your heat treatment shop?<\/h3>\n <p>Aobo Steel supplies tool steel and alloy steel in annealed or soft condition for distributors, stockists and industrial projects. Share the grade, size, quantity, tolerance and destination to receive a practical supply suggestion.<\/p>\n <\/div>\n <div class=\"aobo-cta-actions\">\n <a class=\"aobo-btn aobo-btn-primary popmake-16052\" href=\"javascript:void(0);\">Open Contact Form<\/a>\n <a class=\"aobo-btn aobo-btn-whatsapp\" href=\"https:\/\/wa.me\/8618062945370\" target=\"_blank\" rel=\"noopener\">Chat on WhatsApp<\/a>\n <\/div>\n <\/div>\n\n <p class=\"aobo-source\">Data source: ASM Handbook, Wrought Tool Steels (revised by Alan M. Bayer, Teledyne Vasco, and Lee R. Walton, Latrobe Steel Company). Table 10. Data compiled from public references and industry standards.<\/p>\n <\/div>\n<\/section>\n\n<script>\n(function () {\n \/* Rating class mapping *\/\n function rc(val) {\n if (!val || val === \"\\u2014\") return \"r-dash\";\n var v = val.toLowerCase();\n if (v === \"highest\") return \"r-highest\";\n if (v === \"very high\") return \"r-vhigh\";\n if (v === \"high\") return \"r-high\";\n if (v === \"medium to high\") return \"r-medhigh\";\n if (v === \"medium\") return \"r-medium\";\n if (v === \"low to medium\") return \"r-lowmed\";\n if (v === \"low\") return \"r-low\";\n if (v === \"lowest\") return \"r-lowest\";\n return \"r-medium\";\n }\n\n function badge(val) {\n if (!val || val === \"\\u2014\") return '<span class=\"r-dash\">\\u2014<\/span>';\n return '<span class=\"aobo-rating ' + rc(val) + '\">' + val + '<\/span>';\n }\n\n var tableData = [\n {\n category: \"Molybdenum High-Speed Steels\",\n rows: [\n { grade: \"M1\", decarb: \"Low\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"Medium\", hardness: \"60-65\", machinability: \"Medium\", toughness: \"Low\", wear: \"Very high\", softening: \"Very high\" },\n { grade: \"M2\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"Medium\", hardness: \"60-65\", machinability: \"Medium\", toughness: \"Low\", wear: \"Very high\", softening: \"Very high\" },\n { grade: \"M3 (class 1 and 2)\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"Medium\", hardness: \"61-66\", machinability: \"Medium\", toughness: \"Low\", wear: \"Very high\", softening: \"Very high\" },\n { grade: \"M4\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"Medium\", hardness: \"61-66\", machinability: \"Low to medium\", toughness: \"Low\", wear: \"Very high\", softening: \"Highest\" },\n { grade: \"M7\", decarb: \"Low\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"Medium\", hardness: \"61-66\", machinability: \"Medium\", toughness: \"Low\", wear: \"Very high\", softening: \"Very high\" },\n { grade: \"M10\", decarb: \"Low\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"Medium\", hardness: \"60-65\", machinability: \"Medium\", toughness: \"Low\", wear: \"Very high\", softening: \"Very high\" },\n { grade: \"M30\", decarb: \"Low\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"Medium\", hardness: \"60-65\", machinability: \"Medium\", toughness: \"Low\", wear: \"Highest\", softening: \"Very high\" },\n { grade: \"M33\", decarb: \"Low\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"Medium\", hardness: \"60-65\", machinability: \"Medium\", toughness: \"Low\", wear: \"Highest\", softening: \"Very high\" },\n { grade: \"M34\", decarb: \"Low\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"Medium\", hardness: \"60-65\", machinability: \"Medium\", toughness: \"Low\", wear: \"Highest\", softening: \"Very high\" },\n { grade: \"M35\", decarb: \"Low\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"Medium\", hardness: \"60-65\", machinability: \"Medium\", toughness: \"Low\", wear: \"Highest\", softening: \"Very high\" },\n { grade: \"M36\", decarb: \"Low\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"Medium\", hardness: \"60-65\", machinability: \"Medium\", toughness: \"Low\", wear: \"Highest\", softening: \"Very high\" },\n { grade: \"M41\", decarb: \"Low\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"Medium\", hardness: \"65-70\", machinability: \"Medium\", toughness: \"Low\", wear: \"Highest\", softening: \"Very high\" },\n { grade: \"M42\", decarb: \"Low\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"Medium\", hardness: \"65-70\", machinability: \"Medium\", toughness: \"Low\", wear: \"Highest\", softening: \"Very high\" },\n { grade: \"M43\", decarb: \"Low\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"Medium\", hardness: \"65-70\", machinability: \"Medium\", toughness: \"Low\", wear: \"Highest\", softening: \"Very high\" },\n { grade: \"M44\", decarb: \"Low\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"Medium\", hardness: \"62-70\", machinability: \"Medium\", toughness: \"Low\", wear: \"Highest\", softening: \"Very high\" },\n { grade: \"M46\", decarb: \"Low\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"Medium\", hardness: \"67-69\", machinability: \"Medium\", toughness: \"Low\", wear: \"Highest\", softening: \"Very high\" },\n { grade: \"M47\", decarb: \"Low\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"Medium\", hardness: \"65-70\", machinability: \"Medium\", toughness: \"Low\", wear: \"Highest\", softening: \"Very high\" },\n { grade: \"M48\", decarb: \"Low\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"Medium\", hardness: \"65-70\", machinability: \"Low\", toughness: \"Low\", wear: \"Highest\", softening: \"Highest\" },\n { grade: \"M62\", decarb: \"Low\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"Medium\", hardness: \"62-68\", machinability: \"Medium\", toughness: \"Low\", wear: \"Highest\", softening: \"Very high\" }\n ]\n },\n {\n category: \"Tungsten High-Speed Steels\",\n rows: [\n { grade: \"T1\", decarb: \"High\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"High\", hardness: \"60-65\", machinability: \"Medium\", toughness: \"Low\", wear: \"Very high\", softening: \"Very high\" },\n { grade: \"T2\", decarb: \"High\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"High\", hardness: \"61-66\", machinability: \"Medium\", toughness: \"Low\", wear: \"Very high\", softening: \"Very high\" },\n { grade: \"T4\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"Medium\", hardness: \"62-66\", machinability: \"Medium\", toughness: \"Low\", wear: \"Highest\", softening: \"Very high\" },\n { grade: \"T5\", decarb: \"Low\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"Medium\", hardness: \"60-65\", machinability: \"Medium\", toughness: \"Low\", wear: \"Highest\", softening: \"Very high\" },\n { grade: \"T6\", decarb: \"Low\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"Medium\", hardness: \"60-65\", machinability: \"Low to medium\", toughness: \"Low\", wear: \"Highest\", softening: \"Very high\" },\n { grade: \"T8\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"Medium\", hardness: \"60-65\", machinability: \"Medium\", toughness: \"Low\", wear: \"Highest\", softening: \"Very high\" },\n { grade: \"T15\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"Medium\", hardness: \"63-68\", machinability: \"Low to medium\", toughness: \"Low\", wear: \"Highest\", softening: \"Highest\" }\n ]\n },\n {\n category: \"Intermediate High-Speed Steels\",\n rows: [\n { grade: \"M50\", decarb: \"Low\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"Medium\", hardness: \"58-63\", machinability: \"Medium\", toughness: \"Low\", wear: \"High\", softening: \"High\" },\n { grade: \"M52\", decarb: \"Low\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"Medium\", hardness: \"58-64\", machinability: \"Medium\", toughness: \"Low\", wear: \"High\", softening: \"High\" }\n ]\n },\n {\n category: \"Chromium Hot-Work Steels\",\n rows: [\n { grade: \"H10\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"Very low\", cracking: \"Highest\", hardness: \"39-56\", machinability: \"Medium to high\", toughness: \"High\", wear: \"High\", softening: \"Medium\" },\n { grade: \"H11\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"Very low\", cracking: \"Highest\", hardness: \"38-54\", machinability: \"Medium to high\", toughness: \"Very high\", wear: \"High\", softening: \"Medium\" },\n { grade: \"H12\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"Very low\", cracking: \"Highest\", hardness: \"38-55\", machinability: \"Medium to high\", toughness: \"Very high\", wear: \"High\", softening: \"Medium\" },\n { grade: \"H13\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"Very low\", cracking: \"Highest\", hardness: \"38-53\", machinability: \"Medium to high\", toughness: \"Very high\", wear: \"High\", softening: \"Medium\" },\n { grade: \"H14\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"Low\", cracking: \"Highest\", hardness: \"40-47\", machinability: \"Medium\", toughness: \"High\", wear: \"High\", softening: \"Medium\" },\n { grade: \"H19\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"A, low; O, medium\", cracking: \"High\", hardness: \"40-57\", machinability: \"Medium\", toughness: \"High\", wear: \"High\", softening: \"Medium to high\" }\n ]\n },\n {\n category: \"Tungsten Hot-Work Steels\",\n rows: [\n { grade: \"H21\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"A, low; O, medium\", cracking: \"High\", hardness: \"36-54\", machinability: \"Medium\", toughness: \"High\", wear: \"High\", softening: \"Medium to high\" },\n { grade: \"H22\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"A, low; O, medium\", cracking: \"High\", hardness: \"39-52\", machinability: \"Medium\", toughness: \"High\", wear: \"High\", softening: \"Medium to high\" },\n { grade: \"H23\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"Medium\", cracking: \"High\", hardness: \"34-47\", machinability: \"Medium\", toughness: \"Medium\", wear: \"Very high\", softening: \"Medium to high\" },\n { grade: \"H24\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"A, low; O, medium\", cracking: \"High\", hardness: \"45-55\", machinability: \"Medium\", toughness: \"Medium\", wear: \"Very high\", softening: \"High\" },\n { grade: \"H25\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"A, low; O, medium\", cracking: \"High\", hardness: \"35-44\", machinability: \"Medium\", toughness: \"High\", wear: \"Very high\", softening: \"Medium\" },\n { grade: \"H26\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"High\", hardness: \"43-58\", machinability: \"Medium\", toughness: \"Medium\", wear: \"Very high\", softening: \"High\" }\n ]\n },\n {\n category: \"Molybdenum Hot-Work Steels\",\n rows: [\n { grade: \"H42\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"A or S, low; O, medium\", cracking: \"Medium\", hardness: \"50-60\", machinability: \"Medium\", toughness: \"Medium\", wear: \"Very high\", softening: \"High\" }\n ]\n },\n {\n category: \"Air-Hardening, Medium-Alloy Cold-Work Steels\",\n rows: [\n { grade: \"A2\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"Lowest\", cracking: \"Highest\", hardness: \"57-62\", machinability: \"Medium\", toughness: \"Medium\", wear: \"High\", softening: \"High\" },\n { grade: \"A3\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"Lowest\", cracking: \"Highest\", hardness: \"57-65\", machinability: \"Medium\", toughness: \"Medium\", wear: \"High\", softening: \"Very high\" },\n { grade: \"A4\", decarb: \"Medium to high\", hardening: \"Deep\", distortion: \"Lowest\", cracking: \"Highest\", hardness: \"54-62\", machinability: \"Low to medium\", toughness: \"Medium\", wear: \"Medium\", softening: \"Medium to high\" },\n { grade: \"A6\", decarb: \"Medium to high\", hardening: \"Deep\", distortion: \"Lowest\", cracking: \"Highest\", hardness: \"54-60\", machinability: \"Low to medium\", toughness: \"Medium\", wear: \"Medium\", softening: \"Medium to high\" },\n { grade: \"A7\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"Lowest\", cracking: \"Highest\", hardness: \"57-67\", machinability: \"Low\", toughness: \"Low\", wear: \"High\", softening: \"Highest\" },\n { grade: \"A8\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"Lowest\", cracking: \"Highest\", hardness: \"50-60\", machinability: \"Medium\", toughness: \"High\", wear: \"High\", softening: \"Medium to high\" },\n { grade: \"A9\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"Lowest\", cracking: \"Highest\", hardness: \"35-56\", machinability: \"Medium\", toughness: \"High\", wear: \"High\", softening: \"Medium to high\" },\n { grade: \"A10\", decarb: \"Medium to high\", hardening: \"Deep\", distortion: \"Lowest\", cracking: \"Highest\", hardness: \"55-62\", machinability: \"Medium to high\", toughness: \"Medium\", wear: \"Medium\", softening: \"High\" }\n ]\n },\n {\n category: \"High-Carbon, High-Chromium Cold-Work Steels\",\n rows: [\n { grade: \"D2\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"Lowest\", cracking: \"Highest\", hardness: \"54-61\", machinability: \"Low\", toughness: \"Low\", wear: \"High\", softening: \"High to very high\" },\n { grade: \"D3\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"Very low\", cracking: \"High\", hardness: \"54-61\", machinability: \"Low\", toughness: \"Low\", wear: \"High\", softening: \"Very high\" },\n { grade: \"D4\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"Lowest\", cracking: \"Highest\", hardness: \"54-61\", machinability: \"Low\", toughness: \"Low\", wear: \"High\", softening: \"Very high\" },\n { grade: \"D5\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"Lowest\", cracking: \"Highest\", hardness: \"54-61\", machinability: \"Low\", toughness: \"Low\", wear: \"High\", softening: \"High to very high\" },\n { grade: \"D7\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"Lowest\", cracking: \"Highest\", hardness: \"58-65\", machinability: \"Low\", toughness: \"Low\", wear: \"High\", softening: \"Highest\" }\n ]\n },\n {\n category: \"Oil-Hardening Cold-Work Steels\",\n rows: [\n { grade: \"O1\", decarb: \"High\", hardening: \"Medium\", distortion: \"Very low\", cracking: \"Very high\", hardness: \"57-62\", machinability: \"High\", toughness: \"Medium\", wear: \"Low\", softening: \"Medium\" },\n { grade: \"O2\", decarb: \"High\", hardening: \"Medium\", distortion: \"Very low\", cracking: \"Very high\", hardness: \"57-62\", machinability: \"High\", toughness: \"Medium\", wear: \"Low\", softening: \"Medium\" },\n { grade: \"O6\", decarb: \"High\", hardening: \"Medium\", distortion: \"Very low\", cracking: \"Very high\", hardness: \"58-63\", machinability: \"Highest\", toughness: \"Medium\", wear: \"Low\", softening: \"Medium\" },\n { grade: \"O7\", decarb: \"High\", hardening: \"Medium\", distortion: \"O, very low; W, high\", cracking: \"W, low; O, very high\", hardness: \"58-64\", machinability: \"High\", toughness: \"Medium\", wear: \"Low\", softening: \"Medium\" }\n ]\n },\n {\n category: \"Shock-Resisting Steels\",\n rows: [\n { grade: \"S1\", decarb: \"Medium\", hardening: \"Medium\", distortion: \"Medium\", cracking: \"High\", hardness: \"40-58\", machinability: \"Medium\", toughness: \"Very high\", wear: \"Medium\", softening: \"Low to medium\" },\n { grade: \"S2\", decarb: \"Low\", hardening: \"Medium\", distortion: \"High\", cracking: \"Low\", hardness: \"50-60\", machinability: \"Medium to high\", toughness: \"Highest\", wear: \"Low\", softening: \"Low to medium\" },\n { grade: \"S5\", decarb: \"Low\", hardening: \"Medium\", distortion: \"Medium\", cracking: \"High\", hardness: \"50-60\", machinability: \"Medium to high\", toughness: \"Highest\", wear: \"Low\", softening: \"Low to medium\" },\n { grade: \"S6\", decarb: \"Low\", hardening: \"Medium\", distortion: \"Medium\", cracking: \"High\", hardness: \"54-56\", machinability: \"Medium\", toughness: \"Very high\", wear: \"Low\", softening: \"Low to medium\" },\n { grade: \"S7\", decarb: \"Medium\", hardening: \"Deep\", distortion: \"A, lowest; O, low\", cracking: \"O, high; A, highest\", hardness: \"45-57\", machinability: \"Medium\", toughness: \"Very high\", wear: \"High\", softening: \"Low to medium\" }\n ]\n },\n {\n category: \"Low-Alloy Special-Purpose Steels\",\n rows: [\n { grade: \"L2\", decarb: \"High\", hardening: \"Medium\", distortion: \"O, medium; W, low\", cracking: \"O, medium; W, high\", hardness: \"45-63\", machinability: \"High\", toughness: \"Very high\", wear: \"Low\", softening: \"Low to medium\" },\n { grade: \"L6\", decarb: \"High\", hardening: \"Medium\", distortion: \"Low\", cracking: \"High\", hardness: \"45-62\", machinability: \"Medium\", toughness: \"Very high\", wear: \"Low\", softening: \"Medium\" }\n ]\n },\n {\n category: \"Low-Carbon Mold Steels\",\n rows: [\n { grade: \"P2\", decarb: \"High\", hardening: \"Medium\", distortion: \"Low\", cracking: \"High\", hardness: \"58-64 (c)\", machinability: \"Medium to high\", toughness: 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resistance across all major tool steel grades. Search by grade name to compare properties side by side. 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