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-orange: #ef5b27;\n --aobo-orange-soft: #fff0e9;\n --aobo-text: #172334;\n --aobo-muted: #667789;\n --aobo-border: #d8e5f2;\n --white: #ffffff;\n --shadow: 0 20px 54px rgba(4, 42, 104, 0.13);\n --radius-lg: 26px;\n --radius-md: 18px;\n }\n\n * { box-sizing: border-box; }\n\n body {\n margin: 0;\n font-family: Arial, Helvetica, sans-serif;\n color: var(--aobo-text);\n background: transparent;\n }\n\n .aobo-equivalent-finder {\n max-width: 1160px;\n margin: 0 auto;\n overflow: visible;\n background: transparent;\n }\n\n .tool-hero {\n position: relative;\n padding: 34px 34px 30px;\n text-align: center;\n overflow: hidden;\n background:\n radial-gradient(circle at 100% 0%, rgba(239, 91, 39, 0.12), transparent 30%),\n linear-gradient(180deg, #ffffff 0%, #f6faff 100%);\n border: 1px solid rgba(3, 78, 206, 0.16);\n border-radius: 28px;\n box-shadow: var(--shadow);\n margin-bottom: 18px;\n }\n\n .tool-hero::after {\n content: \"\";\n position: absolute;\n right: -90px;\n top: -130px;\n width: 260px;\n height: 260px;\n border-radius: 50%;\n background: rgba(239, 91, 39, 0.10);\n }\n\n .tool-hero h1 {\n position: relative;\n z-index: 1;\n margin: 0;\n color: var(--aobo-blue);\n font-size: clamp(34px, 4.6vw, 52px);\n line-height: 1.04;\n font-weight: 900;\n letter-spacing: -0.06em;\n }\n\n .tool-body { padding: 0; }\n\n .top-layout {\n margin-bottom: 22px;\n }\n\n .answer-card,\n .info-card,\n .class-item,\n .warning-box {\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 .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;\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 .answer-topbar {\n position: relative;\n z-index: 1;\n display: grid;\n grid-template-columns: minmax(250px, 320px) minmax(0, 1fr);\n gap: 22px;\n align-items: start;\n margin-bottom: 18px;\n }\n\n .selector-panel {\n padding: 18px;\n border: 1px solid rgba(3, 78, 206, 0.14);\n border-radius: 20px;\n background: rgba(255, 255, 255, 0.88);\n backdrop-filter: blur(8px);\n }\n\n .selector-panel .small-help {\n margin-bottom: 0;\n }\n\n .grade-intro {\n padding-top: 4px;\n }\n\n .answer-card {\n position: relative;\n overflow: hidden;\n padding: 24px;\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 .answer-card::after {\n content: \"\";\n position: absolute;\n right: -48px;\n bottom: -70px;\n width: 220px;\n height: 220px;\n border-radius: 50%;\n border: 18px solid rgba(3, 78, 206, 0.08);\n }\n\n .grade-header {\n position: relative;\n z-index: 1;\n display: flex;\n align-items: flex-start;\n justify-content: space-between;\n gap: 18px;\n margin-bottom: 14px;\n }\n\n .grade-name {\n margin: 0;\n color: var(--aobo-blue);\n font-size: 44px;\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 13px;\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 0 16px;\n max-width: 820px;\n color: #324b63;\n font-size: 15px;\n line-height: 1.6;\n font-weight: 700;\n }\n\n .answer-grid {\n position: relative;\n z-index: 1;\n display: grid;\n grid-template-columns: 1fr;\n gap: 14px;\n }\n\n .answer-box {\n border: 1px solid rgba(3, 78, 206, 0.14);\n border-radius: 20px;\n background: rgba(255, 255, 255, 0.88);\n overflow: hidden;\n backdrop-filter: blur(8px);\n }\n\n .box-head {\n display: flex;\n align-items: center;\n justify-content: space-between;\n gap: 10px;\n padding: 12px 14px;\n border-bottom: 1px solid rgba(216, 229, 242, 0.9);\n background: rgba(248, 251, 255, 0.92);\n }\n\n .box-head b {\n color: var(--aobo-blue-dark);\n font-size: 14px;\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 .answer-rows {\n display: grid;\n grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));\n gap: 8px;\n padding: 14px;\n }\n\n .answer-row {\n min-height: 50px;\n padding: 9px 11px;\n border: 1px solid #e1edf8;\n border-radius: 14px;\n background: #ffffff;\n }\n\n .answer-row span {\n display: block;\n margin-bottom: 4px;\n color: var(--aobo-blue);\n font-size: 11px;\n line-height: 1.2;\n font-weight: 900;\n text-transform: uppercase;\n letter-spacing: 0.03em;\n }\n\n .answer-row strong {\n display: block;\n color: #1f3244;\n font-size: 13px;\n line-height: 1.35;\n font-weight: 800;\n }\n\n .chips-wrap { padding: 14px; }\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 .detail-grid {\n display: grid;\n grid-template-columns: repeat(2, minmax(0, 1fr));\n gap: 20px;\n align-items: start;\n margin-top: 18px;\n }\n\n .half-card {\n min-height: 100%;\n }\n\n .info-card { overflow: hidden; }\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 .table-wrap {\n width: 100%;\n overflow-x: auto;\n }\n\n table {\n width: 100%;\n min-width: 640px;\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 { border-bottom: none; }\n\n .explain-area {\n margin-top: 24px;\n padding-top: 22px;\n border-top: 1px solid var(--aobo-border);\n }\n\n .explain-head {\n display: flex;\n align-items: flex-end;\n justify-content: space-between;\n gap: 18px;\n margin-bottom: 14px;\n }\n\n .explain-head h2 {\n margin: 0;\n color: var(--aobo-blue-dark);\n font-size: 22px;\n line-height: 1.2;\n }\n\n .explain-head p {\n margin: 0;\n max-width: 560px;\n color: var(--aobo-muted);\n font-size: 14px;\n line-height: 1.55;\n }\n\n .classification-strip {\n display: grid;\n grid-template-columns: repeat(4, 1fr);\n gap: 14px;\n margin-bottom: 18px;\n }\n\n .class-item {\n min-height: 112px;\n padding: 18px;\n border-radius: 20px;\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 .warning-box {\n padding: 18px;\n border-color: #ffd4bf;\n background: linear-gradient(180deg, #fff9f5 0%, #ffffff 100%);\n border-radius: 20px;\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: 1060px) {\n .answer-topbar,\n .answer-grid,\n .detail-grid,\n .classification-strip {\n grid-template-columns: 1fr;\n }\n\n .full-width-card {\n grid-column: auto;\n }\n }\n\n @media (max-width: 640px) {\n .aobo-equivalent-finder {\n margin: 0 auto;\n }\n\n .tool-hero { padding: 28px 18px 24px; }\n .tool-hero h1 { font-size: 32px; }\n .tool-body { padding: 0; }\n .grade-header { flex-direction: column; }\n .grade-name { font-size: 38px; }\n .answer-card { padding: 18px; }\n .selector-panel { padding: 16px; }\n .answer-rows { grid-template-columns: 1fr; }\n .explain-head {\n align-items: flex-start;\n flex-direction: column;\n }\n }\n\n <\/style>\n<\/head>\n<body>\n <main class=\"aobo-equivalent-finder\">\n <section class=\"tool-hero\">\n <h1>Tool Steel Equivalent Grade Finder<\/h1>\n <\/section>\n\n <section class=\"tool-body\">\n <div class=\"top-layout\">\n <article class=\"answer-card\" aria-live=\"polite\">\n <div class=\"answer-topbar\">\n <div class=\"selector-panel\">\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\">Select a grade to see the core equivalent answer immediately. Related grades, trade names, and specifications are placed below.<\/p>\n <\/div>\n\n <div class=\"grade-intro\">\n <div class=\"grade-header\">\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 here.<\/p>\n <\/div>\n <\/div>\n\n <div class=\"answer-grid\">\n <div class=\"answer-box\">\n <div class=\"box-head\">\n <b>Core Equivalent Grades<\/b>\n <span class=\"count-pill\" id=\"quickCoreCount\">0 items<\/span>\n <\/div>\n <div class=\"answer-rows\" id=\"topCoreRows\"><\/div>\n <\/div>\n <\/div>\n <\/article>\n <\/div>\n\n <div class=\"detail-grid\">\n <article class=\"info-card half-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 half-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\n <article class=\"info-card half-card\" id=\"tradeNamesCard\">\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 half-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 <\/div>\n\n <section class=\"explain-area\">\n <div class=\"explain-head\">\n <h2>How to Read the Result<\/h2>\n <p>The answer is shown first. This section explains how to separate direct equivalents from related grades, modified grades, and manufacturer trade names.<\/p>\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=\"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 <\/section>\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\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 topCoreRows = document.getElementById(\"topCoreRows\");\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 renderTopCoreRows(rows) {\n topCoreRows.innerHTML = \"\";\n\n if (!rows.length) {\n const empty = document.createElement(\"span\");\n empty.className = \"chip empty-state\";\n empty.textContent = \"No core equivalent grades listed in the current reference data.\";\n topCoreRows.appendChild(empty);\n return;\n }\n\n rows.forEach(function(row) {\n const item = document.createElement(\"div\");\n item.className = \"answer-row\";\n\n const label = document.createElement(\"span\");\n label.textContent = row[0];\n\n const value = document.createElement(\"strong\");\n value.textContent = row[1];\n\n item.appendChild(label);\n item.appendChild(value);\n topCoreRows.appendChild(item);\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 renderTopCoreRows(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(\"quickCoreCount\", 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>Aobo Steel Equivalent Grade Finder Tool Steel Equivalent Grade Finder Select steel grade Select a grade to see the core equivalent answer immediately. Related grades, trade names, and specifications are placed below. D2 Cold Work Core equivalent grade data will appear here. Core Equivalent Grades 0 items Related \/ Comparable Grades 0 items Modified Grades […]<\/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":"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-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<\/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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}\n\n .top-layout {\n margin-bottom: 22px;\n }\n\n .answer-card,\n .info-card,\n .class-item,\n .warning-box {\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 .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;\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 .answer-topbar {\n position: relative;\n z-index: 1;\n display: grid;\n grid-template-columns: minmax(250px, 320px) minmax(0, 1fr);\n gap: 22px;\n align-items: start;\n margin-bottom: 18px;\n }\n\n .selector-panel {\n padding: 18px;\n border: 1px solid rgba(3, 78, 206, 0.14);\n border-radius: 20px;\n background: rgba(255, 255, 255, 0.88);\n backdrop-filter: blur(8px);\n }\n\n .selector-panel .small-help {\n margin-bottom: 0;\n }\n\n .grade-intro {\n padding-top: 4px;\n }\n\n .answer-card {\n position: relative;\n overflow: hidden;\n padding: 24px;\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 .answer-card::after {\n content: \"\";\n position: absolute;\n right: -48px;\n bottom: -70px;\n width: 220px;\n height: 220px;\n border-radius: 50%;\n border: 18px solid rgba(3, 78, 206, 0.08);\n }\n\n .grade-header {\n position: relative;\n z-index: 1;\n display: flex;\n align-items: flex-start;\n justify-content: space-between;\n gap: 18px;\n margin-bottom: 14px;\n }\n\n .grade-name {\n margin: 0;\n color: var(--aobo-blue);\n font-size: 44px;\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 13px;\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 0 16px;\n max-width: 820px;\n color: #324b63;\n font-size: 15px;\n line-height: 1.6;\n font-weight: 700;\n }\n\n .answer-grid {\n position: relative;\n z-index: 1;\n display: grid;\n grid-template-columns: 1fr;\n gap: 14px;\n }\n\n .answer-box {\n border: 1px solid rgba(3, 78, 206, 0.14);\n border-radius: 20px;\n background: rgba(255, 255, 255, 0.88);\n overflow: hidden;\n backdrop-filter: blur(8px);\n }\n\n .box-head {\n display: flex;\n align-items: center;\n justify-content: space-between;\n gap: 10px;\n padding: 12px 14px;\n border-bottom: 1px solid rgba(216, 229, 242, 0.9);\n background: rgba(248, 251, 255, 0.92);\n }\n\n .box-head b {\n color: var(--aobo-blue-dark);\n font-size: 14px;\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 .answer-rows {\n display: grid;\n grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));\n gap: 8px;\n padding: 14px;\n }\n\n .answer-row {\n min-height: 50px;\n padding: 9px 11px;\n border: 1px solid #e1edf8;\n border-radius: 14px;\n background: #ffffff;\n }\n\n .answer-row span {\n display: block;\n margin-bottom: 4px;\n color: var(--aobo-blue);\n font-size: 11px;\n line-height: 1.2;\n font-weight: 900;\n text-transform: uppercase;\n letter-spacing: 0.03em;\n }\n\n .answer-row strong {\n display: block;\n color: #1f3244;\n font-size: 13px;\n line-height: 1.35;\n font-weight: 800;\n }\n\n .chips-wrap { padding: 14px; }\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 .detail-grid {\n display: grid;\n grid-template-columns: repeat(2, minmax(0, 1fr));\n gap: 20px;\n align-items: start;\n margin-top: 18px;\n }\n\n .half-card {\n min-height: 100%;\n }\n\n .info-card { overflow: hidden; }\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 .table-wrap {\n width: 100%;\n overflow-x: auto;\n }\n\n table {\n width: 100%;\n min-width: 640px;\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 { border-bottom: none; }\n\n .explain-area {\n margin-top: 24px;\n padding-top: 22px;\n border-top: 1px solid var(--aobo-border);\n }\n\n .explain-head {\n display: flex;\n align-items: flex-end;\n justify-content: space-between;\n gap: 18px;\n margin-bottom: 14px;\n }\n\n .explain-head h2 {\n margin: 0;\n color: var(--aobo-blue-dark);\n font-size: 22px;\n line-height: 1.2;\n }\n\n .explain-head p {\n margin: 0;\n max-width: 560px;\n color: var(--aobo-muted);\n font-size: 14px;\n line-height: 1.55;\n }\n\n .classification-strip {\n display: grid;\n grid-template-columns: repeat(4, 1fr);\n gap: 14px;\n margin-bottom: 18px;\n }\n\n .class-item {\n min-height: 112px;\n padding: 18px;\n border-radius: 20px;\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 .warning-box {\n padding: 18px;\n border-color: #ffd4bf;\n background: linear-gradient(180deg, #fff9f5 0%, #ffffff 100%);\n border-radius: 20px;\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: 1060px) {\n .answer-topbar,\n .answer-grid,\n .detail-grid,\n .classification-strip {\n grid-template-columns: 1fr;\n }\n\n .full-width-card {\n grid-column: auto;\n }\n }\n\n @media (max-width: 640px) {\n .aobo-equivalent-finder {\n margin: 0 auto;\n }\n\n .tool-hero { padding: 28px 18px 24px; }\n .tool-hero h1 { font-size: 32px; }\n .tool-body { padding: 0; }\n .grade-header { flex-direction: column; }\n .grade-name { font-size: 38px; }\n .answer-card { padding: 18px; }\n .selector-panel { padding: 16px; }\n .answer-rows { grid-template-columns: 1fr; }\n .explain-head {\n align-items: flex-start;\n flex-direction: column;\n }\n }\n\n <\/style>\n<\/head>\n<body>\n <main class=\"aobo-equivalent-finder\">\n <section class=\"tool-hero\">\n <h1>Tool Steel Equivalent Grade Finder<\/h1>\n <\/section>\n\n <section class=\"tool-body\">\n <div class=\"top-layout\">\n <article class=\"answer-card\" aria-live=\"polite\">\n <div class=\"answer-topbar\">\n <div class=\"selector-panel\">\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\">Select a grade to see the core equivalent answer immediately. Related grades, trade names, and specifications are placed below.<\/p>\n <\/div>\n\n <div class=\"grade-intro\">\n <div class=\"grade-header\">\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 here.<\/p>\n <\/div>\n <\/div>\n\n <div class=\"answer-grid\">\n <div class=\"answer-box\">\n <div class=\"box-head\">\n <b>Core Equivalent Grades<\/b>\n <span class=\"count-pill\" id=\"quickCoreCount\">0 items<\/span>\n <\/div>\n <div class=\"answer-rows\" id=\"topCoreRows\"><\/div>\n <\/div>\n <\/div>\n <\/article>\n <\/div>\n\n <div class=\"detail-grid\">\n <article class=\"info-card half-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 half-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\n <article class=\"info-card half-card\" id=\"tradeNamesCard\">\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 half-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 <\/div>\n\n <section class=\"explain-area\">\n <div class=\"explain-head\">\n <h2>How to Read the Result<\/h2>\n <p>The answer is shown first. This section explains how to separate direct equivalents from related grades, modified grades, and manufacturer trade names.<\/p>\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=\"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 <\/section>\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\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 topCoreRows = document.getElementById(\"topCoreRows\");\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 renderTopCoreRows(rows) {\n topCoreRows.innerHTML = \"\";\n\n if (!rows.length) {\n const empty = document.createElement(\"span\");\n empty.className = \"chip empty-state\";\n empty.textContent = \"No core equivalent grades listed in the current reference data.\";\n topCoreRows.appendChild(empty);\n return;\n }\n\n rows.forEach(function(row) {\n const item = document.createElement(\"div\");\n item.className = \"answer-row\";\n\n const label = document.createElement(\"span\");\n label.textContent = row[0];\n\n const value = document.createElement(\"strong\");\n value.textContent = row[1];\n\n item.appendChild(label);\n item.appendChild(value);\n topCoreRows.appendChild(item);\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 renderTopCoreRows(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(\"quickCoreCount\", 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>Aobo Steel Equivalent Grade Finder Tool Steel Equivalent Grade Finder Select steel grade Select a grade to see the core equivalent answer immediately. Related grades, trade names, and specifications are placed below. D2 Cold Work Core equivalent grade data will appear here. Core Equivalent Grades 0 items Related \/ Comparable Grades 0 items Modified Grades […]<\/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":"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-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<\/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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