Aobo Steel Equivalent Grade Finder<\/title>\n <style>\n :root {\n --aobo-blue: #034ece;\n --aobo-blue-dark: #062a68;\n --aobo-blue-soft: #eaf3ff;\n --aobo-cyan: #0492fa;\n --aobo-orange: #ef5b27;\n --aobo-orange-soft: #fff0e9;\n --aobo-text: #172334;\n --aobo-muted: #667789;\n --aobo-border: #d8e5f2;\n --aobo-bg: #f5f9ff;\n --white: #ffffff;\n --shadow: 0 22px 58px rgba(4, 42, 104, 0.14);\n --radius-lg: 26px;\n --radius-md: 18px;\n }\n\n * {\n box-sizing: border-box;\n }\n\n body {\n margin: 0;\n font-family: Arial, Helvetica, sans-serif;\n color: var(--aobo-text);\n background:\n radial-gradient(circle at 12% 8%, rgba(4, 146, 250, 0.12), transparent 28%),\n radial-gradient(circle at 88% 20%, rgba(239, 91, 39, 0.12), transparent 26%),\n linear-gradient(180deg, #ffffff 0%, #f3f8ff 100%);\n }\n\n .aobo-equivalent-finder {\n width: min(1180px, calc(100% - 28px));\n margin: 32px auto;\n border: 1px solid rgba(3, 78, 206, 0.16);\n border-radius: 32px;\n overflow: hidden;\n background: var(--white);\n box-shadow: var(--shadow);\n }\n\n .tool-body {\n padding: 34px 42px 42px;\n }\n\n .control-panel {\n display: grid;\n grid-template-columns: minmax(260px, 0.8fr) 1.2fr;\n gap: 22px;\n margin-bottom: 24px;\n }\n\n .control-card,\n .grade-card,\n .info-card,\n .note-card {\n border: 1px solid var(--aobo-border);\n border-radius: var(--radius-lg);\n background: #ffffff;\n box-shadow: 0 12px 28px rgba(4, 42, 104, 0.06);\n }\n\n .control-card {\n padding: 24px;\n background: linear-gradient(180deg, #ffffff 0%, #f7fbff 100%);\n }\n\n .label {\n display: block;\n margin-bottom: 10px;\n color: var(--aobo-blue-dark);\n font-size: 13px;\n font-weight: 900;\n text-transform: uppercase;\n letter-spacing: 0.08em;\n }\n\n select {\n width: 100%;\n min-height: 58px;\n border: 1px solid #b9cce0;\n border-radius: 16px;\n padding: 0 18px;\n background: #ffffff;\n color: var(--aobo-blue-dark);\n outline: none;\n font-size: 18px;\n font-weight: 900;\n cursor: pointer;\n transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;\n }\n\n select:focus {\n border-color: var(--aobo-orange);\n box-shadow: 0 0 0 5px rgba(239, 91, 39, 0.16);\n }\n\n .small-help {\n margin: 12px 0 0;\n color: var(--aobo-muted);\n font-size: 14px;\n line-height: 1.55;\n }\n\n .grade-card {\n position: relative;\n padding: 24px;\n overflow: hidden;\n background:\n radial-gradient(circle at 100% 0%, rgba(239, 91, 39, 0.14), transparent 30%),\n linear-gradient(135deg, #ffffff 0%, #eef6ff 100%);\n }\n\n .grade-card::after {\n content: \"\";\n position: absolute;\n right: -42px;\n bottom: -62px;\n width: 210px;\n height: 210px;\n border-radius: 50%;\n border: 18px solid rgba(3, 78, 206, 0.08);\n }\n\n .grade-topline {\n position: relative;\n z-index: 1;\n display: flex;\n align-items: flex-start;\n justify-content: space-between;\n gap: 16px;\n margin-bottom: 12px;\n }\n\n .grade-name {\n margin: 0;\n color: var(--aobo-blue);\n font-size: 42px;\n line-height: 1;\n font-weight: 900;\n letter-spacing: -0.06em;\n }\n\n .family-pill {\n display: inline-flex;\n align-items: center;\n min-height: 34px;\n padding: 7px 12px;\n border-radius: 999px;\n background: var(--aobo-orange);\n color: #ffffff;\n font-size: 12px;\n font-weight: 900;\n text-transform: uppercase;\n letter-spacing: 0.04em;\n white-space: nowrap;\n }\n\n .grade-summary {\n position: relative;\n z-index: 1;\n margin: 0;\n max-width: 720px;\n color: #41566b;\n font-size: 15px;\n line-height: 1.65;\n font-weight: 600;\n }\n\n .classification-strip {\n display: grid;\n grid-template-columns: repeat(4, 1fr);\n gap: 14px;\n margin: 0 0 24px;\n }\n\n .class-item {\n min-height: 112px;\n padding: 18px;\n border: 1px solid var(--aobo-border);\n border-radius: 20px;\n background: #ffffff;\n box-shadow: 0 10px 22px rgba(4, 42, 104, 0.05);\n }\n\n .class-item b {\n display: block;\n margin-bottom: 8px;\n color: var(--aobo-blue-dark);\n font-size: 14px;\n }\n\n .class-item p {\n margin: 0;\n color: var(--aobo-muted);\n font-size: 13px;\n line-height: 1.5;\n }\n\n .main-grid {\n display: grid;\n grid-template-columns: 1fr 360px;\n gap: 22px;\n align-items: start;\n }\n\n .results-stack {\n display: grid;\n gap: 18px;\n }\n\n .info-card {\n overflow: hidden;\n }\n\n .card-head {\n display: flex;\n align-items: center;\n justify-content: space-between;\n gap: 14px;\n padding: 18px 22px;\n border-bottom: 1px solid var(--aobo-border);\n background: #f8fbff;\n }\n\n .card-head h2 {\n margin: 0;\n color: var(--aobo-blue-dark);\n font-size: 18px;\n line-height: 1.2;\n }\n\n .count-pill {\n display: inline-flex;\n align-items: center;\n min-height: 28px;\n padding: 5px 10px;\n border-radius: 999px;\n color: var(--aobo-blue);\n background: var(--aobo-blue-soft);\n font-size: 12px;\n font-weight: 900;\n white-space: nowrap;\n }\n\n .table-wrap {\n width: 100%;\n overflow-x: auto;\n }\n\n table {\n width: 100%;\n min-width: 660px;\n border-collapse: collapse;\n }\n\n th,\n td {\n padding: 15px 18px;\n border-bottom: 1px solid #edf3fa;\n vertical-align: top;\n text-align: left;\n font-size: 15px;\n line-height: 1.48;\n }\n\n th {\n width: 32%;\n color: var(--aobo-blue);\n background: #fbfdff;\n font-weight: 900;\n }\n\n td {\n color: #263747;\n font-weight: 650;\n }\n\n tr:last-child th,\n tr:last-child td {\n border-bottom: none;\n }\n\n .chips-wrap {\n padding: 18px 22px 22px;\n }\n\n .chips {\n display: flex;\n flex-wrap: wrap;\n gap: 10px;\n }\n\n .chip {\n display: inline-flex;\n align-items: center;\n min-height: 34px;\n padding: 8px 12px;\n border-radius: 999px;\n border: 1px solid #cfe0f2;\n background: #f2f7ff;\n color: var(--aobo-blue-dark);\n font-size: 13px;\n font-weight: 800;\n }\n\n .chip.modified {\n border-color: #ffd4bf;\n background: var(--aobo-orange-soft);\n color: #a13712;\n }\n\n .empty-state {\n color: var(--aobo-muted);\n background: #f8fafc;\n border: 1px dashed #c2d0de;\n font-weight: 700;\n }\n\n .side-stack {\n display: grid;\n gap: 18px;\n }\n\n .note-card {\n padding: 22px;\n background: #ffffff;\n }\n\n .note-card h2 {\n margin: 0 0 12px;\n color: var(--aobo-blue-dark);\n font-size: 18px;\n }\n\n .note-box {\n min-height: 184px;\n padding: 16px;\n border: 1px dashed #b8cce0;\n border-radius: 18px;\n background:\n repeating-linear-gradient(180deg, #ffffff 0, #ffffff 35px, #f2f7fc 36px),\n #ffffff;\n color: #9caabb;\n font-size: 14px;\n line-height: 1.65;\n }\n\n .warning-box {\n padding: 18px;\n border-radius: 20px;\n border: 1px solid #ffd4bf;\n background: linear-gradient(180deg, #fff9f5 0%, #ffffff 100%);\n }\n\n .warning-box b {\n display: block;\n margin-bottom: 8px;\n color: #a13712;\n font-size: 15px;\n }\n\n .warning-box p {\n margin: 0;\n color: #6f4a36;\n font-size: 13px;\n line-height: 1.6;\n }\n\n .footer-line {\n margin-top: 24px;\n padding-top: 22px;\n border-top: 1px solid var(--aobo-border);\n display: flex;\n align-items: center;\n justify-content: space-between;\n gap: 18px;\n color: var(--aobo-muted);\n font-size: 13px;\n }\n\n .footer-line strong {\n color: var(--aobo-blue);\n letter-spacing: 0.05em;\n }\n\n @media (max-width: 980px) {\n .control-panel,\n .main-grid,\n .classification-strip {\n grid-template-columns: 1fr;\n }\n\n .footer-line {\n align-items: flex-start;\n flex-direction: column;\n }\n\n }\n\n @media (max-width: 560px) {\n .aobo-equivalent-finder {\n width: min(100% - 16px, 1180px);\n margin: 12px auto;\n border-radius: 22px;\n }\n\n .tool-body {\n padding: 22px 16px;\n }\n\n\n .grade-topline {\n flex-direction: column;\n }\n\n .grade-name {\n font-size: 36px;\n }\n\n .control-card,\n .grade-card,\n .note-card {\n padding: 18px;\n }\n }\n <\/style>\n<\/head>\n<body>\n <main class=\"aobo-equivalent-finder\">\n <section class=\"tool-body\">\n <div class=\"control-panel\">\n <div class=\"control-card\">\n <label class=\"label\" for=\"gradeSelect\">Select steel grade<\/label>\n <select id=\"gradeSelect\" aria-label=\"Select steel grade\"><\/select>\n <p class=\"small-help\">The results update automatically after selection.<\/p>\n <\/div>\n\n <div class=\"grade-card\">\n <div class=\"grade-topline\">\n <h2 class=\"grade-name\" id=\"gradeName\">D2<\/h2>\n <span class=\"family-pill\" id=\"gradeFamily\">Cold Work<\/span>\n <\/div>\n <p class=\"grade-summary\" id=\"gradeSummary\">Core equivalent grade data will appear below.<\/p>\n <\/div>\n <\/div>\n\n <div class=\"classification-strip\">\n <div class=\"class-item\">\n <b>Core Equivalent<\/b>\n <p>Most common cross-reference grades used for international sourcing.<\/p>\n <\/div>\n <div class=\"class-item\">\n <b>Related Grade<\/b>\n <p>Similar or comparable grades that should not be treated as direct substitutes.<\/p>\n <\/div>\n <div class=\"class-item\">\n <b>Modified Grade<\/b>\n <p>Intentional chemistry or processing variants, such as P20+Ni or P20+S.<\/p>\n <\/div>\n <div class=\"class-item\">\n <b>Trade Name<\/b>\n <p>Manufacturer or commercial names separated from formal standard grades.<\/p>\n <\/div>\n <\/div>\n\n <div class=\"main-grid\">\n <div class=\"results-stack\">\n <article class=\"info-card\">\n <div class=\"card-head\">\n <h2>Core Equivalent Grades<\/h2>\n <span class=\"count-pill\" id=\"coreCount\">0 items<\/span>\n <\/div>\n <div class=\"table-wrap\">\n <table>\n <tbody id=\"coreTable\"><\/tbody>\n <\/table>\n <\/div>\n <\/article>\n\n <article class=\"info-card\">\n <div class=\"card-head\">\n <h2>Related \/ Comparable Grades<\/h2>\n <span class=\"count-pill\" id=\"relatedCount\">0 items<\/span>\n <\/div>\n <div class=\"chips-wrap\">\n <div class=\"chips\" id=\"relatedChips\"><\/div>\n <\/div>\n <\/article>\n\n <article class=\"info-card\">\n <div class=\"card-head\">\n <h2>Modified Grades \/ Substitutes<\/h2>\n <span class=\"count-pill\" id=\"modifiedCount\">0 items<\/span>\n <\/div>\n <div class=\"chips-wrap\">\n <div class=\"chips\" id=\"modifiedChips\"><\/div>\n <\/div>\n <\/article>\n <\/div>\n\n <aside class=\"side-stack\">\n <article class=\"info-card\">\n <div class=\"card-head\">\n <h2>Trade Names<\/h2>\n <span class=\"count-pill\" id=\"tradeCount\">0 items<\/span>\n <\/div>\n <div class=\"chips-wrap\">\n <div class=\"chips\" id=\"tradeChips\"><\/div>\n <\/div>\n <\/article>\n\n <article class=\"info-card\">\n <div class=\"card-head\">\n <h2>Standard Specifications<\/h2>\n <span class=\"count-pill\" id=\"specCount\">0 items<\/span>\n <\/div>\n <div class=\"chips-wrap\">\n <div class=\"chips\" id=\"specChips\"><\/div>\n <\/div>\n <\/article>\n\n <article class=\"note-card\">\n <h2>Notes Area<\/h2>\n <div class=\"note-box\" contenteditable=\"true\" aria-label=\"Notes area\"><\/div>\n <\/article>\n\n <div class=\"warning-box\">\n <b>Substitution reminder<\/b>\n <p>Equivalent grade names are reference information. For real orders, confirm chemical composition, delivery condition, inspection standard, size, surface condition, and application before substitution.<\/p>\n <\/div>\n <\/aside>\n <\/div>\n\n <div class=\"footer-line\">\n <strong>AOBO STEEL<\/strong>\n <span>One-stop tool steel manufacturing and sourcing hub<\/span>\n <\/div>\n <\/section>\n <\/main>\n\n <script>\n const gradeData = {\n \"D2\": {\n family: \"Cold Work\",\n summary: \"D2 is best treated as a core match with 1.2379, SKD11, Cr12Mo1V1, BD2, X160CrMoV12, and UNS T30402. Manufacturer names are separated as trade names.\",\n core: [\n [\"AISI \/ ASTM\", \"D2\"],\n [\"UNS\", \"T30402\"],\n [\"DIN \/ W.-Nr.\", \"1.2379; X155CrMoV12-1\"],\n [\"JIS\", \"SKD11\"],\n [\"GB\", \"Cr12Mo1V1\"],\n [\"BS\", \"BD2\"],\n [\"AFNOR \/ NF\", \"X160CrMoV12\"],\n [\"ISO\", \"160CrMoV12\"]\n ],\n related: [],\n modified: [],\n trades: [\"Hitachi SLD\", \"Daido DC11\", \"Nachi CDS11\", \"B\u00f6hler K110\", \"ASSAB XW41\", \"Diehard Standard\", \"DOM VM\"],\n specs: [\"ASTM A681\", \"SAE J437\", \"SAE J438\", \"FED QQ-T-570\"]\n },\n \"D3\": {\n family: \"Cold Work\",\n summary: \"D3 should be centered on 1.2080 \/ X210Cr12 and SKD1. Tungsten-bearing or less common references are placed under related grades.\",\n core: [\n [\"AISI \/ ASTM\", \"D3\"],\n [\"UNS\", \"T30403\"],\n [\"DIN \/ W.-Nr.\", \"1.2080; X210Cr12\"],\n [\"JIS\", \"SKD1\"],\n [\"BS\", \"BD3\"],\n [\"UNI\", \"X210Cr13KU\"],\n [\"AFNOR\", \"Z300C12\"]\n ],\n related: [\"DIN 1.2136\", \"DIN 1.2883\", \"JIS SKD2\", \"X210CrW12\"],\n modified: [],\n trades: [],\n specs: [\"ASTM A681\", \"SAE J438\", \"SAE J-137\", \"FED QQ-T-570\"]\n },\n \"D6\": {\n family: \"Cold Work\",\n summary: \"The available source data for D6 is limited. Keep the page conservative and avoid presenting it as a broad international cross-reference table.\",\n core: [\n [\"ISO\", \"210CrW12\"],\n [\"DIN\", \"X210CrW12\"]\n ],\n related: [],\n modified: [],\n trades: [],\n specs: []\n },\n \"A2\": {\n family: \"Cold Work\",\n summary: \"A2 is best presented with 1.2363, SKD12, BA2, Z100CDV5, SS 2260, and UNS T30102 as core cross-reference names.\",\n core: [\n [\"AISI \/ ASTM\", \"A2\"],\n [\"UNS\", \"T30102\"],\n [\"DIN \/ W.-Nr.\", \"1.2363\"],\n [\"JIS\", \"SKD12\"],\n [\"BS\", \"BA2\"],\n [\"AFNOR\", \"Z100CDV5\"],\n [\"SS\", \"2260\"]\n ],\n related: [],\n modified: [],\n trades: [\"Airkool\", \"CA 510\", \"Cromodie HC\", \"CRMI\", \"Hecla 175\", \"SCV 5\"],\n specs: [\"ASTM A681\", \"SAE J437\", \"SAE J438\", \"FED QQ-T-570\"]\n },\n \"O1\": {\n family: \"Cold Work\",\n summary: \"O1 should be centered on 1.2510, SKS3, BO1, 90MWCV5, 9CrWMn, and UNS T31501. Other SKS references are safer as related grades.\",\n core: [\n [\"AISI \/ ASTM\", \"O1\"],\n [\"UNS\", \"T31501\"],\n [\"DIN \/ W.-Nr.\", \"1.2510\"],\n [\"JIS\", \"SKS3\"],\n [\"BS\", \"BO1\"],\n [\"AFNOR\", \"90MWCV5\"],\n [\"SS\", \"2140\"],\n [\"GB\", \"9CrWMn\"]\n ],\n related: [\"JIS SKS21\", \"JIS SKS93\", \"JIS SKS94\", \"JIS SKS95\"],\n modified: [],\n trades: [\"Arne\", \"K.E. 637\", \"MIC 4\", \"MCT\", \"SPCR\"],\n specs: [\"ASTM A681\", \"SAE J437\", \"SAE J438\", \"FED QQ-T-570\"]\n },\n \"O2\": {\n family: \"Cold Work\",\n summary: \"O2 has fewer internationally listed equivalents in the provided data. Keep the result focused on O2, T31502, and BO2.\",\n core: [\n [\"AISI \/ ASTM\", \"O2\"],\n [\"UNS\", \"T31502\"],\n [\"BS\", \"BO2\"]\n ],\n related: [],\n modified: [],\n trades: [\"CMC\", \"Hecla 15\", \"HMI\", \"NSCD\", \"NSS 3\", \"P 704\"],\n specs: [\"ASTM A681\", \"FED QQ-T-570\"]\n },\n \"S1\": {\n family: \"Shock Resisting\",\n summary: \"S1 is centered on UNS T41901, DIN 1.2550, 45WCrV7, BS1, SKS41\/SKS4, and 5CrW2Si. DIN 1.2542 is better kept as a related reference.\",\n core: [\n [\"AISI \/ ASTM\", \"S1\"],\n [\"UNS\", \"T41901\"],\n [\"DIN \/ W.-Nr.\", \"1.2550; 45WCrV7\"],\n [\"BS\", \"BS1\"],\n [\"AFNOR\", \"55WC20\"],\n [\"JIS\", \"SKS41; SKS4\"],\n [\"SS\", \"2710\"],\n [\"UNI\", \"158WCr9KC; 45WCrV8KU\"],\n [\"GB\", \"5CrW2Si\"]\n ],\n related: [\"DIN 1.2542\"],\n modified: [],\n trades: [\"2P\", \"2% tungsten\", \"BCD\", \"FMP 399\", \"Pax\", \"PCSK\", \"Spear 75\", \"Spear AHC\", \"Stora 18\", \"T Quality\"],\n specs: [\"ASTM A681\", \"SAE J438\", \"FED QQ-T-570\"]\n },\n \"S7\": {\n family: \"Shock Resisting\",\n summary: \"S7 data should not be over-expanded. The source supports the US designation, UNS number, and a few commercial names.\",\n core: [\n [\"AISI \/ ASTM\", \"S7\"],\n [\"UNS\", \"T41907\"]\n ],\n related: [],\n modified: [],\n trades: [\"Bearcat\", \"Crucible S7\"],\n specs: [\"ASTM A681\", \"FED QQ-T-570\"]\n },\n \"52100\": {\n family: \"Bearing Steel\",\n summary: \"52100 should be centered on 100Cr6 \/ 1.3505 \/ GCr15 \/ En31. Other DIN bearing steels and 5280 should be separated from core equivalents.\",\n core: [\n [\"AISI \/ SAE\", \"52100; E52100\"],\n [\"UNS\", \"G52986\"],\n [\"DIN \/ W.-Nr.\", \"1.3505; 100Cr6\"],\n [\"BS\", \"En31; 534A99; 535A99\"],\n [\"AFNOR \/ NF\", \"100C6\"],\n [\"GB\", \"GCr15\"],\n [\"UNI\", \"100Cr6\"],\n [\"SS\", \"2258\"]\n ],\n related: [\"DIN 1.2067\", \"DIN 1.2059\", \"DIN 1.2060\", \"DIN 1.3503\", \"DIN 1.3514\", \"DIN 1.3520\"],\n modified: [\"5280\", \"80CrMn4\"],\n trades: [],\n specs: [\"ASTM A29\", \"ASTM A295\", \"ASTM A322\", \"ASTM A505\", \"ASTM A519\", \"ASTM A535\", \"ASTM A646\", \"ASTM A711\", \"AMS 6440\", \"AMS 6441\", \"AMS 6444\", \"AMS 6447\"]\n },\n \"H10\": {\n family: \"Hot Work\",\n summary: \"H10 should be centered on 1.2365, 4Cr3Mo3SiV, BH10, and UNS T20810. Commercial or modified names are separated.\",\n core: [\n [\"AISI \/ ASTM\", \"H10\"],\n [\"UNS\", \"T20810\"],\n [\"DIN \/ W.-Nr.\", \"1.2365; X32CrMoV3-3; 32CrMoV12-28\"],\n [\"GB\", \"4Cr3Mo3SiV; 4Cr3Mo-3SiV\"],\n [\"BS\", \"BH10\"],\n [\"AFNOR\", \"32CrMoV12-28\"],\n [\"UNI\", \"30CrMoV1227KU; 30CrMoV1227\"],\n [\"UNE\", \"30CrMoV12\"]\n ],\n related: [],\n modified: [\"BH10A\"],\n trades: [\"BF 1\", \"BH 10\"],\n specs: [\"ASTM A681\", \"FED QQ-T-570\"]\n },\n \"H11\": {\n family: \"Hot Work\",\n summary: \"H11 should be centered on 1.2343, X38CrMoV5-1, SKD6, 35CrMoV5, and UNS T20811. Entries that overlap with H13 should be checked before substitution.\",\n core: [\n [\"AISI \/ ASTM\", \"H11\"],\n [\"UNS\", \"T20811\"],\n [\"ISO\", \"35CrMoV5\"],\n [\"DIN \/ W.-Nr.\", \"1.2343; X38CrMoV5-1; X38CrMoV5\"],\n [\"JIS\", \"SKD6\"],\n [\"BS\", \"BH11\"],\n [\"AFNOR \/ NF\", \"Z38CDV5; X38CrMoV5\"],\n [\"SS\", \"2242\"],\n [\"GOST\", \"4\u04255\u041c\u0424\u0421\"],\n [\"KS\", \"STD6\"]\n ],\n related: [\"DIN 1.7783\", \"DIN 1.7784\", \"UNI X35CrMo05KU\"],\n modified: [],\n trades: [\"Hecla 174\", \"NBS\"],\n specs: [\"ASTM A681\", \"SAE J437\", \"SAE J438\", \"SAE J467\", \"AMS 6437\", \"AMS 6485\", \"AMS 6487\", \"AMS 6488\", \"FED QQ-T-570\"]\n },\n \"H13\": {\n family: \"Hot Work\",\n summary: \"H13 should be centered on 1.2344, X40CrMoV5-1, SKD61, 4Cr5MoSiV1, BH13, Z40CDV5, and UNS T20813. H11 and H13 should not be presented as interchangeable.\",\n core: [\n [\"AISI \/ ASTM\", \"H13\"],\n [\"UNS\", \"T20813\"],\n [\"DIN \/ W.-Nr.\", \"1.2344; X40CrMoV5-1\"],\n [\"JIS\", \"SKD61\"],\n [\"GB\", \"4Cr5MoSiV1\"],\n [\"BS\", \"BH13\"],\n [\"AFNOR\", \"Z40CDV5\"],\n [\"SS\", \"confirm against order specification\"]\n ],\n related: [\"UNI X35CrMo05KU, listed in some sources, confirm before substitution\"],\n modified: [],\n trades: [\"Uddeholm Orvar\", \"Orvar Supreme\", \"UHB ORVAR M SUPREME\", \"Hitachi YXM4\", \"Daido DH31\", \"Latrobe VDC\", \"Latrobe VDC-RF\", \"Carpenter 883\", \"Dica B Vanadium\", \"Thyrotherm 2344\", \"Nu-Die XL\", \"Firedie 13\", \"Guterl H-13\", \"HDS\", \"Je\", \"Stora 67\"],\n specs: [\"ASTM A681\", \"SAE J437\", \"SAE J438\", \"SAE J467\", \"FED QQ-T-570\"]\n },\n \"H21\": {\n family: \"Hot Work\",\n summary: \"H21 is centered on 1.2581, SKD5, BH21, Z30WCV9, 3Cr2W8V, and UNS T20821.\",\n core: [\n [\"AISI \/ ASTM\", \"H21\"],\n [\"UNS\", \"T20821\"],\n [\"DIN \/ W.-Nr.\", \"1.2581\"],\n [\"JIS\", \"SKD5\"],\n [\"BS\", \"BH21\"],\n [\"AFNOR\", \"Z30WCV9\"],\n [\"UNI\", \"X28W09KU\"],\n [\"SS\", \"2730\"],\n [\"GB\", \"3Cr2W8V\"]\n ],\n related: [\"BH21A\"],\n modified: [],\n trades: [\"Hecla 149C\", \"HM3\", \"HP\", \"HSM\/W9A\", \"Intrinsic Special\"],\n specs: [\"ASTM A681\", \"SAE J437\", \"SAE J438\", \"FED QQ-T-570\"]\n },\n \"L6\": {\n family: \"Special Purpose\",\n summary: \"L6 should be centered on L6, UNS T61206, 1.2714, SKT4, SKS51, and 55NCDV7. Treat 1.2713 as a related reference unless the order specification confirms it.\",\n core: [\n [\"AISI \/ ASTM\", \"L6\"],\n [\"UNS\", \"T61206\"],\n [\"DIN \/ W.-Nr.\", \"1.2714\"],\n [\"JIS\", \"SKT4; SKS51\"],\n [\"AFNOR\", \"55NCDV7\"]\n ],\n related: [\"DIN 1.2713\"],\n modified: [],\n trades: [],\n specs: [\"ASTM A681\", \"SAE J437\", \"SAE J438\", \"FED QQ-T-570\"]\n },\n \"M2\": {\n family: \"High Speed\",\n summary: \"M2 is centered on 1.3343, SKH51, BM2, Z85WDCV06-05-04-10, SS 2722, and UNS T11302. High-carbon M2 variants are separated.\",\n core: [\n [\"AISI \/ ASTM\", \"M2\"],\n [\"UNS\", \"T11302\"],\n [\"DIN \/ W.-Nr.\", \"1.3343\"],\n [\"JIS\", \"SKH51; SKH9\"],\n [\"BS\", \"BM2\"],\n [\"AFNOR\", \"Z85WDCV06-05-04-10\"],\n [\"SS\", \"2722\"]\n ],\n related: [\"DIN 1.3341\", \"DIN 1.3345\", \"DIN 1.3553\", \"DIN 1.3554\"],\n modified: [\"High-carbon M2: 1.3340\", \"High-carbon M2: 1.3342\", \"Z90WDCV06-05-04-02\"],\n trades: [\"CPM Rex M2HCHS\", \"CPM M2 HSHC\", \"Mo 500\", \"6542 Molybdenum\"],\n specs: [\"ASTM A600\"]\n },\n \"M35\": {\n family: \"High Speed\",\n summary: \"M35 is centered on 1.3243, SKH55, BM35, SS 2723, and UNS T11335.\",\n core: [\n [\"AISI \/ ASTM\", \"M35\"],\n [\"UNS\", \"T11335\"],\n [\"DIN \/ W.-Nr.\", \"1.3243\"],\n [\"JIS\", \"SKH55\"],\n [\"BS\", \"BM35\"],\n [\"AFNOR\", \"Z85WDKCV06-05-05-04-02; Z90WDKC06-05-05-04\"],\n [\"SS\", \"2723\"]\n ],\n related: [],\n modified: [],\n trades: [\"Capital 398\", \"Mo 550\", \"More 500\", \"CPM Rex M35S\", \"CPM Rex M35 HCHS\"],\n specs: []\n },\n \"M42\": {\n family: \"High Speed\",\n summary: \"M42 is centered on 1.3247, SKH59, BM42, HS 2-9-1-8, W2Mo9Cr4VCo8, and UNS T11342. CPM Rex 20 is treated as a substitute, not a direct standard equivalent.\",\n core: [\n [\"AISI \/ ASTM\", \"M42\"],\n [\"UNS\", \"T11342\"],\n [\"ISO \/ EN\", \"HS 2-9-1-8\"],\n [\"DIN \/ W.-Nr.\", \"1.3247\"],\n [\"JIS\", \"SKH59\"],\n [\"BS\", \"BM42\"],\n [\"AFNOR\", \"Z110DKCWV09-08-04-02-01\"],\n [\"GB\", \"W2Mo9Cr4VCo8; T72948\"]\n ],\n related: [],\n modified: [\"CPM Rex 20\"],\n trades: [\"CPM REX M42\", \"HSS-Co\", \"CMC\"],\n specs: [\"ASTM A600\", \"FED QQ-T-590\"]\n },\n \"P20\": {\n family: \"Plastic Mold\",\n summary: \"P20 should be centered on P20, UNS T51620, 1.2311, 3Cr2Mo, PDS5, and 35CrMo2. 1.2312 and 1.2738 are modified P20 variants, not plain P20.\",\n core: [\n [\"AISI \/ ASTM\", \"P20; P-20\"],\n [\"UNS\", \"T51620\"],\n [\"DIN \/ W.-Nr.\", \"1.2311\"],\n [\"ISO\", \"35CrMo2\"],\n [\"GB\", \"3Cr2Mo; SM3Cr2Mo\"],\n [\"JIS\", \"PDS5\"],\n [\"BS\", \"USA P20\"],\n [\"AFNOR\", \"Z33335CHD7\"],\n [\"SS\", \"USA P20\"]\n ],\n related: [\"DIN 1.2328\", \"DIN 1.2330\"],\n modified: [\"1.2312 \/ P20+S\", \"1.2738 \/ P20+Ni\"],\n trades: [\"CSM 2\", \"ASSAB 618\", \"B\u00f6hler M201\"],\n specs: [\"ASTM A681\"]\n },\n \"P20+Ni\": {\n family: \"Plastic Mold\",\n summary: \"P20+Ni should be treated as a modified P20 family. The core reference is 1.2738, with Chinese 3Cr2NiMo \/ SM3CrNiMo and commercial names separated.\",\n core: [\n [\"Commercial \/ AISI style\", \"P20 Modified; P20+Ni\"],\n [\"DIN \/ W.-Nr.\", \"1.2738\"],\n [\"GB \/ YB\", \"3Cr2NiMo; SM3CrNiMo\"]\n ],\n related: [\"3Cr2MnNiMo\", \"3Cr2NiMnMo\"],\n modified: [],\n trades: [\"ASSAB 718\", \"ASSAB 718S\", \"ASSAB 718H\", \"ASSAB 718 HH\", \"IMPAX HI HARD\"],\n specs: []\n },\n \"P20+S\": {\n family: \"Plastic Mold\",\n summary: \"P20+S should be presented as the sulfurized free-machining P20 variant, with 1.2312 as the key reference.\",\n core: [\n [\"Commercial\", \"P20S; P20+S\"],\n [\"DIN \/ W.-Nr.\", \"1.2312\"]\n ],\n related: [\"Baseline P20\", \"1.2311\", \"3Cr2Mo\", \"P20BS\", \"P20BSCa\"],\n modified: [\"P20BS\", \"P20BSCa\"],\n trades: [\"ASSAB 618\", \"ASSAB 718S\", \"ASSAB 718H\"],\n specs: []\n }\n };\n\n const groups = [\n [\"Cold Work Tool Steels\", [\"D2\", \"D3\", \"D6\", \"A2\", \"O1\", \"O2\", \"S1\", \"S7\", \"52100\"]],\n [\"Hot Work Tool Steels\", [\"H10\", \"H11\", \"H13\", \"H21\", \"L6\"]],\n [\"High Speed Steels\", [\"M2\", \"M35\", \"M42\"]],\n [\"Plastic Mold Steels\", [\"P20\", \"P20+Ni\", \"P20+S\"]]\n ];\n\n const gradeSelect = document.getElementById(\"gradeSelect\");\n const gradeName = document.getElementById(\"gradeName\");\n const gradeFamily = document.getElementById(\"gradeFamily\");\n const gradeSummary = document.getElementById(\"gradeSummary\");\n const coreTable = document.getElementById(\"coreTable\");\n const relatedChips = document.getElementById(\"relatedChips\");\n const modifiedChips = document.getElementById(\"modifiedChips\");\n const tradeChips = document.getElementById(\"tradeChips\");\n const specChips = document.getElementById(\"specChips\");\n\n function buildOptions() {\n groups.forEach(function(groupData) {\n const optgroup = document.createElement(\"optgroup\");\n optgroup.label = groupData[0];\n\n groupData[1].forEach(function(grade) {\n const option = document.createElement(\"option\");\n option.value = grade;\n option.textContent = grade;\n optgroup.appendChild(option);\n });\n\n gradeSelect.appendChild(optgroup);\n });\n }\n\n function updateCount(id, count) {\n const el = document.getElementById(id);\n el.textContent = count === 1 ? \"1 item\" : count + \" items\";\n }\n\n function renderCoreTable(rows) {\n coreTable.innerHTML = \"\";\n\n if (!rows.length) {\n const tr = document.createElement(\"tr\");\n const td = document.createElement(\"td\");\n td.colSpan = 2;\n td.textContent = \"No core equivalent grades listed in the current reference data.\";\n td.style.color = \"#667789\";\n tr.appendChild(td);\n coreTable.appendChild(tr);\n return;\n }\n\n rows.forEach(function(row) {\n const tr = document.createElement(\"tr\");\n const th = document.createElement(\"th\");\n const td = document.createElement(\"td\");\n th.textContent = row[0];\n td.textContent = row[1];\n tr.appendChild(th);\n tr.appendChild(td);\n coreTable.appendChild(tr);\n });\n }\n\n function renderChips(container, items, emptyText, modifiedStyle) {\n container.innerHTML = \"\";\n\n if (!items.length) {\n const empty = document.createElement(\"span\");\n empty.className = \"chip empty-state\";\n empty.textContent = emptyText;\n container.appendChild(empty);\n return;\n }\n\n items.forEach(function(item) {\n const chip = document.createElement(\"span\");\n chip.className = modifiedStyle ? \"chip modified\" : \"chip\";\n chip.textContent = item;\n container.appendChild(chip);\n });\n }\n\n function renderGrade(gradeKey) {\n const data = gradeData[gradeKey];\n if (!data) return;\n\n gradeName.textContent = gradeKey;\n gradeFamily.textContent = data.family;\n gradeSummary.textContent = data.summary;\n\n renderCoreTable(data.core);\n renderChips(relatedChips, data.related, \"No related grades listed for this grade.\", false);\n renderChips(modifiedChips, data.modified, \"No modified grades or substitutes listed for this grade.\", true);\n renderChips(tradeChips, data.trades, \"No trade names listed in the current reference data.\", false);\n renderChips(specChips, data.specs, \"No standard specifications listed in the current reference data.\", false);\n\n updateCount(\"coreCount\", data.core.length);\n updateCount(\"relatedCount\", data.related.length);\n updateCount(\"modifiedCount\", data.modified.length);\n updateCount(\"tradeCount\", data.trades.length);\n updateCount(\"specCount\", data.specs.length);\n }\n\n buildOptions();\n renderGrade(\"D2\");\n\n gradeSelect.addEventListener(\"change\", function(event) {\n renderGrade(event.target.value);\n });\n <\/script>\n<\/body>\n<\/html>\n\n<\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Tool Steel Equivalent Grades & Cross Reference Finder Aobo Steel Equivalent Grade Finder Select steel grade The results update automatically after selection. D2 Cold Work Core equivalent grade data will appear below. Core Equivalent Most common cross-reference grades used for international sourcing. Related Grade Similar or comparable grades that should not be treated as direct […]<\/p>\n","protected":false},"author":1,"featured_media":15124,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"content-type":"","_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","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-15121","page","type-page","status-publish","has-post-thumbnail","hentry"],"yoast_head":"\n<title>Tool Steel Equivalent Grades Chart & Cross Reference | D2, H13, A2, P20 | Aobo Steel - AoboSteel<\/title>\n<meta name=\"description\" content=\"Find equivalent grades for tool steels including D2, H13, H11, A2, O1, M2, M42, P20, and 52100. 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