{"id":20549,"date":"2026-10-02T09:07:44","date_gmt":"2026-10-02T01:07:44","guid":{"rendered":"https:\/\/aobosteel.com\/?page_id=20549"},"modified":"2026-10-02T09:07:44","modified_gmt":"2026-10-02T01:07:44","slug":"gb-high-speed-steel-grades","status":"publish","type":"page","link":"https:\/\/aobosteel.com\/es\/gb-high-speed-steel-grades\/","title":{"rendered":"Grados de acero r\u00e1pido GB: requisitos de temple y dureza"},"content":{"rendered":"\n\n<style>\n\n:root{\n    --aobo-accent:#2563eb; --aobo-accent-dark:#1e1e2e; --aobo-blue:#0c56d0; --aobo-blue-dark:#073b91;\n    --aobo-text:#333; --aobo-muted:#888; --aobo-border:#e5e7eb; --aobo-border-dark:#ddd;\n    --aobo-stripe:#f7f7f9; --aobo-hover:#e8f0fe; --aobo-radius:8px; --aobo-radius-sm:6px;\n    --aobo-orange:#f59e0b; --aobo-fill:#e9ecef;\n  }\n  *{box-sizing:border-box;}\n  html{-webkit-text-size-adjust:100%;}\n  body{margin:0;background:#fff;color:var(--aobo-text);\n    font-family:-apple-system,BlinkMacSystemFont,\"Segoe UI\",Roboto,\"Helvetica Neue\",Arial,sans-serif;\n    font-size:15px;line-height:1.6;}\n\n  \/* Root scope \u2014 WordPress theme guard *\/\n  .ts-props{color:var(--aobo-text);background:transparent;padding:0;box-sizing:border-box;line-height:1.6;}\n  .ts-props *{box-sizing:border-box;}\n  .ts-props button,.ts-props input[type=\"text\"]{\n    background:none !important;border:none !important;border-radius:0 !important;padding:0 !important;\n    margin:0 !important;font-size:inherit !important;font-weight:inherit !important;\n    letter-spacing:normal !important;text-transform:none !important;box-shadow:none !important;\n    line-height:inherit !important;text-decoration:none !important;}\n\n  .aobo-wrap{max-width:1160px;margin:0 auto;}\n\n  \/* Hero *\/\n  .ts-hero{background:#fff;border:1px solid var(--aobo-border);border-radius:var(--aobo-radius);overflow:hidden;}\n  .ts-hero-top{padding:1.5em;background:var(--aobo-stripe);border-bottom:1px solid var(--aobo-border);}\n  .ts-kicker{display:inline-flex;align-items:center;gap:6px;color:var(--aobo-accent);background:var(--aobo-hover);\n    border:1px solid var(--aobo-border);border-radius:var(--aobo-radius-sm);padding:4px 8px;\n    font-size:.85em;font-weight:600;margin-bottom:.8em;}\n  .ts-kicker span{width:6px;height:6px;background:var(--aobo-orange);border-radius:50%;display:inline-block;}\n  .ts-hero h1{margin:0;font-size:2rem;line-height:1.3;color:var(--aobo-text);text-align:center;}\n  .ts-hero-top p{margin:.6em auto 0;max-width:820px;font-size:.9em;line-height:1.6;color:var(--aobo-muted);text-align:center;}\n\n  \/* Tool area *\/\n  .ts-tool-area{padding:1.5em;}\n\n  \/* Legend *\/\n  .ts-legend{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:1em;}\n  .ts-legend > span{display:inline-flex;align-items:center;gap:5px;font-size:.8em;color:var(--aobo-muted);\n    background:var(--aobo-stripe);border:1px solid var(--aobo-border);border-radius:var(--aobo-radius-sm);\n    padding:3px 8px;}\n  .ts-legend b{color:var(--aobo-text);font-weight:600;}\n  .ts-legend .ts-dot{width:9px;height:9px;border-radius:50%;background:var(--aobo-accent);display:inline-block;\n    padding:0;border:0;gap:0;}\n\n  \/* Controls *\/\n  .ts-controls{display:flex;flex-wrap:wrap;gap:10px;align-items:center;background:var(--aobo-stripe);\n    border:1px solid var(--aobo-border);border-radius:var(--aobo-radius);padding:1em;margin-bottom:1.2em;}\n  .ts-search{flex:1 1 220px;max-width:340px;position:relative;}\n  .ts-props .ts-search input{width:100% !important;border:1px solid var(--aobo-border-dark) !important;\n    border-radius:var(--aobo-radius-sm) !important;padding:.5em .6em .5em 2em !important;\n    font-size:.92em !important;color:var(--aobo-text) !important;background:#fff !important;\n    outline:none !important;box-shadow:none !important;}\n  .ts-props .ts-search input:focus{border-color:var(--aobo-accent) !important;\n    box-shadow:0 0 0 2px rgba(37,99,235,.12) !important;}\n  .ts-search::before{content:\"\";position:absolute;left:.7em;top:50%;transform:translateY(-50%);\n    width:13px;height:13px;background:var(--aobo-muted);\n    -webkit-mask:url(\"data:image\/svg+xml;utf8,<svg xmlns='http:\/\/www.w3.org\/2000\/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2'><circle cx='11' cy='11' r='8'\/><path d='m21 21-4.3-4.3'\/><\/svg>\") center\/contain no-repeat;\n    mask:url(\"data:image\/svg+xml;utf8,<svg xmlns='http:\/\/www.w3.org\/2000\/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2'><circle cx='11' cy='11' r='8'\/><path d='m21 21-4.3-4.3'\/><\/svg>\") center\/contain no-repeat;}\n  .ts-chips{display:flex;flex-wrap:wrap;gap:6px;}\n  .ts-props .ts-chip{border:1px solid var(--aobo-border-dark) !important;background:#fff !important;\n    color:var(--aobo-text) !important;border-radius:999px !important;padding:.4em .9em !important;\n    font-size:.8em !important;font-weight:600 !important;cursor:pointer !important;transition:all .15s !important;}\n  .ts-props .ts-chip:hover{background:var(--aobo-hover) !important;border-color:var(--aobo-accent) !important;}\n  .ts-props .ts-chip.on{background:var(--aobo-accent) !important;border-color:var(--aobo-accent) !important;color:#fff !important;}\n  .ts-count{font-size:.8em;color:var(--aobo-muted);margin-left:auto;white-space:nowrap;}\n\n  \/* Table *\/\n  .ts-table-wrap{overflow-x:auto;border:1px solid var(--aobo-border);border-radius:var(--aobo-radius);\n    background:#fff;box-shadow:0 1px 2px rgba(16,24,40,.04);}\n  table.ts-table{border-collapse:collapse;width:100%;min-width:880px;font-size:.88em;}\n  .ts-table thead th{position:sticky;top:0;z-index:2;background:var(--aobo-accent-dark);color:#fff;\n    border-bottom:0;border-right:1px solid rgba(255,255,255,.1);text-align:center;padding:.6em .7em;\n    font-size:.82em;font-weight:600;text-transform:none;letter-spacing:.02em;cursor:pointer;\n    white-space:nowrap;user-select:none;}\n  .ts-table thead th:last-child{border-right:0;}\n  .ts-table thead th .ts-arr{color:#ffd166;font-weight:700;margin-left:3px;}\n  .ts-table tbody td{padding:.55em .7em;border-bottom:1px solid var(--aobo-border);text-align:center;\n    vertical-align:middle;white-space:nowrap;}\n  .ts-table tbody tr:nth-child(even){background:var(--aobo-stripe);}\n  .ts-table tbody tr:hover{background:var(--aobo-hover);}\n  .ts-table tbody tr.ts-group td{background:#e8ecf1;font-weight:700;font-size:.78em;letter-spacing:.05em;\n    text-transform:uppercase;color:#3c4043;padding:.55em .7em;border-bottom:1px solid var(--aobo-border);\n    text-align:left;}\n  .ts-table tbody tr:not(.ts-group).ts-hide{display:none;}\n  td.ts-grade{font-weight:700;font-size:.95em;text-align:left;white-space:nowrap;color:var(--aobo-text);}\n  .ts-meter{display:inline-flex;align-items:center;gap:7px;}\n  .ts-meter i{display:inline-block;width:44px;height:6px;border-radius:3px;background:var(--aobo-fill);overflow:hidden;}\n  .ts-meter i b{display:block;height:100%;border-radius:3px;background:linear-gradient(90deg,#4d94ff,var(--aobo-accent));}\n  .ts-meter span{font-size:.9em;font-weight:600;min-width:14px;}\n  .ts-hr{font-variant-numeric:tabular-nums;font-weight:500;}\n  .ts-num{font-variant-numeric:tabular-nums;}\n  .ts-sup{font-size:9px;color:var(--aobo-accent);vertical-align:super;line-height:0;}\n\n  \/* Footnotes *\/\n  .ts-notes-list{margin:1.2em 0 0;background:#fff;border:1px solid var(--aobo-border);\n    border-left:3px solid var(--aobo-accent);border-radius:0 var(--aobo-radius) var(--aobo-radius) 0;\n    padding:1em 1.2em 1em 2.2em;font-size:.82em;color:var(--aobo-muted);line-height:1.7;}\n  .ts-notes-list li{margin-bottom:.3em;}\n  .ts-notes-list sup{color:var(--aobo-accent);font-size:10px;}\n\n  \/* Figure *\/\n  .ts-fig{margin:1.2em 0 0;background:#fff;border:1px solid var(--aobo-border);border-radius:var(--aobo-radius);padding:1em;}\n  .ts-fig img{display:block;width:100%;height:auto;border-radius:6px;}\n  .ts-fig figcaption{font-size:.8em;color:var(--aobo-muted);margin-top:.6em;line-height:1.6;}\n  .ts-fig figcaption b{color:var(--aobo-text);}\n\n  \/* Info cards *\/\n  .ts-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:14px;margin-top:1.2em;}\n  .ts-grid .ts-card{background:#fff;border:1px solid var(--aobo-border);border-left:3px solid var(--aobo-accent);\n    border-radius:0 var(--aobo-radius) var(--aobo-radius) 0;padding:1em 1.2em;}\n  .ts-grid h2{font-size:1em;margin:0 0 .4em;color:var(--aobo-text);}\n  .ts-grid p{font-size:.82em;color:var(--aobo-muted);margin:0;line-height:1.7;}\n  .ts-grid p b{color:var(--aobo-text);font-weight:600;}\n\n  \/* Disclaimer *\/\n  .ts-disclaimer{margin-top:1.2em;background:#fff;border:1px solid var(--aobo-border);\n    border-left:3px solid var(--aobo-accent);border-radius:0 var(--aobo-radius) var(--aobo-radius) 0;\n    padding:1em 1.2em;}\n  .ts-disclaimer h3{margin:0 0 .5em;font-size:.95em;color:var(--aobo-text);display:flex;align-items:center;gap:6px;}\n  .ts-disclaimer h3::before{content:\"\\2139\";font-size:1em;color:var(--aobo-accent);}\n  .ts-disclaimer p{margin:0 0 .5em;max-width:none;color:var(--aobo-muted);line-height:1.7;}\n  .ts-disclaimer p:last-child{margin-bottom:0;}\n\n  \/* Empty \/ source *\/\n  .ts-empty{display:none;text-align:center;color:var(--aobo-muted);padding:2em 1em;font-size:.9em;}\n  .ts-empty.show{display:block;}\n  .ts-source{margin-top:.8em;color:var(--aobo-muted);font-size:.82em;line-height:1.58;}\n\n  @media (max-width:860px){\n    .ts-hero-top,.ts-tool-area{padding:1em;}\n    .ts-controls{flex-direction:column;align-items:stretch;}\n    .ts-search{max-width:none;}\n    .ts-count{margin-left:0;}\n    .ts-hero h1{font-size:1.5rem;}\n  }\n  @media (max-width:520px){\n    .ts-hero-top,.ts-tool-area{padding:.8em;}\n    table.ts-table{font-size:.82em;}\n    .ts-table thead th,.ts-table tbody td{padding:.4em .4em;}\n  }\n  table.ts-table thead th{cursor:default;}\n  table.ts-table td.ts-grade{font-weight:700;}\n  table.ts-table td.ts-type{white-space:normal;text-align:left;font-size:.92em;color:#555;min-width:150px;}\n  table.ts-table td.ts-long{white-space:normal;text-align:left;vertical-align:top;font-size:.92em;color:#444;\n    min-width:260px;line-height:1.55;}\n  table.ts-table td.ts-safe{white-space:normal;text-align:left;vertical-align:top;}\n  table.ts-table tbody tr:hover{background:var(--aobo-hover);}\n  table.ts-table tbody tr.ts-group:hover td{background:#e8ecf1;}\n  .ts-sec{margin:1.8em 0 .5em;font-size:1.02em;color:var(--aobo-text);font-weight:700;}\n  .ts-sec span{display:block;font-size:.8em;font-weight:400;color:var(--aobo-muted);margin-top:.15em;line-height:1.6;}\n  .ts-table-wrap{margin-top:.6em;}\n  .ts-tcap{margin:.5em 0 0;font-size:.78em;color:var(--aobo-muted);line-height:1.6;}\n  .ts-props a{color:var(--aobo-blue) !important;text-decoration:none !important;}\n  .ts-props a:hover{text-decoration:underline !important;}\n  .ts-rel{margin-top:1.2em;background:#fff;border:1px solid var(--aobo-border);\n    border-left:3px solid var(--aobo-blue);border-radius:0 var(--aobo-radius) var(--aobo-radius) 0;padding:1em 1.2em;}\n  .ts-rel h3{margin:0 0 .5em;font-size:.95em;color:var(--aobo-text);}\n  .ts-rel p{margin:0;font-size:.85em;line-height:1.9;color:var(--aobo-muted);}\n  .ts-rel p a{font-weight:600;}\n<\/style>\n<style id=\"aobo-dl-css\">\n.aobo-ht-ref.ts-props .ts-dl{display:flex !important;flex-wrap:wrap;align-items:center;gap:1em;\n  background:var(--aobo-stripe) !important;border:1px solid var(--aobo-border) !important;\n  border-radius:var(--aobo-radius) !important;padding:1.1em 1.3em !important;margin:1.5em 0 !important;}\n.aobo-ht-ref.ts-props .ts-dl-txt{flex:1 1 340px;font-size:.95em;color:var(--aobo-text) !important;line-height:1.55;}\n.aobo-ht-ref.ts-props .ts-dl-txt strong{display:block;font-weight:700 !important;margin-bottom:.2em;color:var(--aobo-text) !important;}\n.aobo-ht-ref.ts-props a.ts-dl-btn{display:inline-flex !important;align-items:center;gap:.5em;\n  background:var(--aobo-blue) !important;color:#fff !important;border:1px solid var(--aobo-blue) !important;\n  border-radius:var(--aobo-radius-sm) !important;padding:.75em 1.35em !important;font-size:.95em !important;\n  font-weight:600 !important;text-decoration:none !important;white-space:nowrap;box-shadow:none !important;\n  line-height:1.3 !important;text-transform:none !important;}\n.aobo-ht-ref.ts-props a.ts-dl-btn:hover,.aobo-ht-ref.ts-props a.ts-dl-btn:focus{background:var(--aobo-blue-dark) !important;\n  border-color:var(--aobo-blue-dark) !important;color:#fff !important;}\n.aobo-ht-ref.ts-props a.ts-dl-btn svg{width:1.05em;height:1.05em;fill:none;stroke:currentColor;stroke-width:2;flex:0 0 auto;}\n@media (max-width:640px){.aobo-ht-ref.ts-props a.ts-dl-btn{width:100%;justify-content:center;}}\n<\/style>\n<script id=\"aobo-dl-ga4\">\ndocument.addEventListener('click', function (e) {\n  var a = e.target.closest ? e.target.closest('a.ts-dl-btn') : null;\n  if (!a || typeof window.gtag !== 'function') return;\n  window.gtag('event', 'pdf_download', {\n    file_name: 'Aobo-Steel-GB-High-Speed-Steel-Grades.pdf',\n    link_url: a.href,\n    page_path: window.location.pathname\n  });\n}, false);\n<\/script>\n<style id=\"aobo-ds\">\n.entry-content[class]{--ds-font-body: Lora,serif;--ds-font-head: Lato,sans-serif;--ds-blue: #0c56d0;--ds-blue-deep: #082d6f;--ds-blue-dark: #073b91;--ds-blue-soft: #eaf2ff;--ds-blue-pale: #f7fbff;--ds-border: #d7e5fb;--ds-border-soft: #e8eef8;--ds-text: #203044;--ds-muted: #617087;--ds-orange: #f59b23;--ds-shadow: 0 18px 45px rgba(12,86,208,0.10);--ds-shadow-sm: 0 12px 32px rgba(12,86,208,0.07);font-family: var(--ds-font-body);line-height: 1.7;-webkit-text-size-adjust: 100%;box-sizing: border-box}.entry-content[class] *,.entry-content[class] *::before,.entry-content[class] *::after{box-sizing: border-box}.entry-content[class] h1{font-family: var(--ds-font-head) !important;font-size: clamp(24px,4vw,min(50px,var(--h1-max,50px))) !important;line-height: 1.08 !important;letter-spacing: 0 !important;font-weight: 400 !important;margin: 0 0 16px !important}.entry-content[class] h2{font-family: var(--ds-font-head) !important;font-size: 30px !important;line-height: 1.25 !important;letter-spacing: 0 !important;font-weight: 400 !important;margin: 44px 0 16px !important}.entry-content[class] h3{font-family: var(--ds-font-head) !important;font-size: 23px !important;line-height: 1.3 !important;letter-spacing: 0 !important;font-weight: 400 !important;margin: 30px 0 12px !important}.entry-content[class] h4{font-family: var(--ds-font-head) !important;font-size: 19px !important;line-height: 1.35 !important;letter-spacing: 0 !important;font-weight: 700 !important;margin: 24px 0 10px !important}.entry-content[class] p,.entry-content[class] li,.entry-content[class] dd,.entry-content[class] dt{font-family: var(--ds-font-body) !important;font-size: 17px !important;line-height: 1.7 !important}.entry-content[class] figcaption,.entry-content[class] small,.entry-content[class] .aobo-figure figcaption{font-size: 15px !important;line-height: 1.6 !important}.entry-content[class] table{width: 100%;border-collapse: collapse;background: #ffffff}.entry-content[class] table th,.entry-content[class] table thead th,.entry-content[class] table thead td{background: var(--ds-blue-soft) !important;color: var(--ds-blue-deep) !important;font-family: var(--ds-font-head) !important;font-size: 15px !important;font-weight: 700 !important;line-height: 1.45 !important;text-align: center !important;text-transform: none !important;letter-spacing: 0 !important;padding: 14px 16px !important;border: 0 !important;border-bottom: 1px solid var(--ds-border) !important;vertical-align: top !important;position: static !important}.entry-content[class] table td{font-family: var(--ds-font-body) !important;font-size: 15px !important;line-height: 1.55 !important;padding: 14px 16px !important;border: 0;border-bottom: 1px solid var(--ds-border-soft) !important;vertical-align: top !important;white-space: normal !important;text-align: center !important}.entry-content[class] table tbody tr:last-child td{border-bottom: 0 !important}.entry-content[class] table th.ds-text,.entry-content[class] table td.ds-text{text-align: left !important}.entry-content[class] table tbody tr:nth-child(even){background: #fafcff !important}.entry-content[class] table tbody tr:hover{background: #f2f7ff !important}.entry-content[class] table tbody td:first-child{color: var(--ds-blue-deep);font-weight: 700}.entry-content[class] .aobo-table-wrap,.entry-content[class] .ts-table-wrap{overflow-x: auto;margin: 22px 0 28px;border: 1px solid var(--ds-border);border-radius: 18px;box-shadow: var(--ds-shadow-sm);background: #ffffff}.entry-content[class] h1,.entry-content[class] h2,.entry-content[class] h3,.entry-content[class] h4{color: var(--ds-blue-deep)}.entry-content[class] p,.entry-content[class] li{color: var(--ds-text)}.entry-content[class] a{color: var(--ds-blue);font-weight: 700;text-decoration: none}.entry-content[class] a:hover,.entry-content[class] a:focus{color: var(--ds-orange)}.entry-content[class] .aobo-final-cta h1,.entry-content[class] .aobo-final-cta h2,.entry-content[class] .aobo-final-cta h3,.entry-content[class] .aobo-final-cta p,.entry-content[class] .aobo-cta h1,.entry-content[class] .aobo-cta h2,.entry-content[class] .aobo-cta h3,.entry-content[class] .aobo-cta p,.entry-content[class] .aobo-cta-buttons,.entry-content[class] .aobo-cta-buttons *,.entry-content[class] .aobo-esr .stat-band h2,.entry-content[class] .aobo-esr .stat-band h3,.entry-content[class] .aobo-esr .stat-band p,.entry-content[class] .aobo-esr .closing h2,.entry-content[class] .aobo-esr .closing h3,.entry-content[class] .aobo-esr .closing p,.entry-content[class] .footcta h2,.entry-content[class] .footcta h3,.entry-content[class] .footcta p,.entry-content[class] .bg-dark h2,.entry-content[class] .bg-dark h3,.entry-content[class] .bg-dark p,.entry-content[class] .ht-header h2,.entry-content[class] .ht-header h3,.entry-content[class] .ts-cta h2,.entry-content[class] .ts-cta h3,.entry-content[class] .aobo-sup .stats h2,.entry-content[class] .aobo-sup .stats h3,.entry-content[class] .aobo-sup .stats p,.entry-content[class] .aobo-sup .cta h2,.entry-content[class] .aobo-sup .cta h3,.entry-content[class] .aobo-sup .cta p{color: inherit}.entry-content[class] .aobo-final-cta p,.entry-content[class] .aobo-cta p,.entry-content[class] .aobo-sup .cta p{color: rgba(255,255,255,0.92)}.entry-content[class] .has-ast-global-color-0-background-color,.entry-content[class] .has-ast-global-color-0-background-color *,.entry-content[class] .contact-container,.entry-content[class] .contact-container *{color: #ffffff !important}.entry-content[class] .has-ast-global-color-0-background-color .label-text,.entry-content[class] .has-ast-global-color-0-background-color .label-text *,.entry-content[class] .contact-container .label-text{color: rgba(255,255,255,0.72) !important}.entry-content[class] .aobo-cta h1,.entry-content[class] .aobo-cta h2,.entry-content[class] .aobo-cta h3,.entry-content[class] .aobo-cta h4,.entry-content[class] .cta h1,.entry-content[class] .cta h2,.entry-content[class] .cta h3,.entry-content[class] .cta h4,.entry-content[class] .aobo-final-cta h1,.entry-content[class] .aobo-final-cta h2,.entry-content[class] .aobo-final-cta h3,.entry-content[class] .aobo-final-cta h4{color: #ffffff !important}.entry-content[class] .aobo-cta p,.entry-content[class] .aobo-cta li,.entry-content[class] .cta p,.entry-content[class] .cta li,.entry-content[class] .aobo-final-cta p,.entry-content[class] .aobo-final-cta li{color: rgba(255,255,255,0.93) !important}.entry-content[class] .aobo-cta p a,.entry-content[class] .aobo-cta li a,.entry-content[class] .cta p a,.entry-content[class] .cta li a,.entry-content[class] .aobo-final-cta p a,.entry-content[class] .aobo-final-cta li a{color: #ffffff !important;text-decoration: underline}.entry-content[class] .aobo-btn-inquiry{color: #ffffff !important}.entry-content[class] .aobo-cta .aobo-btn-inquiry,.entry-content[class] .aobo-final-cta .aobo-btn-inquiry{color: var(--ds-blue) !important}.entry-content[class] .aobo-wrap,.entry-content[class] .aobo-article{max-width: 1180px;margin: 0 auto;padding: 0}.entry-content[class] img{max-width: 100%;height: auto}.entry-content[class] figure{margin: 26px auto 34px;max-width: 860px}.entry-content[class] figure img{display: block;width: 100%;border: 1px solid var(--ds-border);border-radius: 18px;box-shadow: var(--ds-shadow-sm);background: #ffffff}.entry-content[class] .aobo-hero{background: linear-gradient(135deg,#ffffff 0%,#f7fbff 56%,#eaf2ff 100%);border: 1px solid var(--ds-border);border-radius: 28px;padding: 42px 38px;margin-bottom: 24px;box-shadow: var(--ds-shadow);overflow: hidden;position: relative}.entry-content[class] .aobo-hero::after{content: \"\";position: absolute;right: -90px;top: -90px;width: 260px;height: 260px;border-radius: 50%;background: rgba(12,86,208,0.08)}.entry-content[class] .aobo-hero h1,.entry-content[class] .aobo-hero p{position: relative;z-index: 2}.entry-content[class] .aobo-note-box{margin: 34px 0;padding: 22px 24px;border: 1px solid var(--ds-border);border-left: 5px solid var(--ds-orange);border-radius: 16px;background: #fbfdff}.entry-content[class] .aobo-note-box p{margin: 0 0 14px;color: var(--ds-muted) !important;font-style: italic}.entry-content[class] .aobo-note-box p:last-child{margin-bottom: 0}.entry-content[class] .aobo-btn{display: inline-flex;align-items: center;justify-content: center;min-height: 42px;padding: 10px 16px;border-radius: 999px;text-align: center;text-decoration: none;font-family: var(--ds-font-head) !important;font-weight: 700;font-size: 14px !important;line-height: 1.2;transition: all 0.2s ease;cursor: pointer;white-space: nowrap}.entry-content[class] .aobo-btn-primary{background: var(--ds-blue);border: 1px solid var(--ds-blue);color: #ffffff !important}.entry-content[class] .aobo-btn-secondary{background: #ffffff;border: 1px solid var(--ds-border);color: var(--ds-blue) !important}.entry-content[class] .aobo-btn:hover{transform: translateY(-1px)}.entry-content[class] .aobo-supply-actions{display: flex;flex-wrap: wrap;gap: 12px;margin-top: 18px}.entry-content[class] .aobo-supply-actions .aobo-btn{min-width: 190px}.entry-content[class] .aobo-final-cta{margin-top: 34px;padding: 34px;border-radius: 28px;background: linear-gradient(135deg,#073b91 0%,#0c56d0 100%);box-shadow: 0 18px 45px rgba(12,86,208,0.20);display: flex;align-items: center;justify-content: space-between;gap: 20px;flex-wrap: wrap}.entry-content[class] .aobo-final-cta h2{margin: 0 0 12px !important;font-size: 26px !important;color: #ffffff !important}.entry-content[class] .aobo-final-cta p{margin: 0}.entry-content[class] .aobo-final-cta .aobo-btn-primary{background: #ffffff;border-color: #ffffff;color: var(--ds-blue) !important}.entry-content[class] .aobo-final-cta .aobo-btn-secondary{background: transparent;border-color: rgba(255,255,255,0.75);color: #ffffff !important}.entry-content[class] .ts-hero{background: transparent !important;border: 0 !important;border-radius: 0 !important;box-shadow: none !important}.entry-content[class] .ts-hero-top{background: linear-gradient(135deg,#ffffff 0%,#f7fbff 56%,#eaf2ff 100%) !important;border: 1px solid var(--ds-border) !important;border-radius: 28px !important;padding: 42px 38px !important;margin: 0 0 24px !important;box-shadow: var(--ds-shadow) !important;position: relative;overflow: hidden;text-align: left !important}.entry-content[class] .ts-hero-top h1,.entry-content[class] .ts-hero-top p,.entry-content[class] .ts-hero h1{text-align: left !important}.entry-content[class] .ts-hero-top p{max-width: none !important;margin: 0 0 12px !important}.entry-content[class] .ts-tool-area{padding: 0 !important}.entry-content[class] .ts-sec{font-family: var(--ds-font-head) !important;font-size: 30px !important;line-height: 1.25 !important;font-weight: 400 !important;color: var(--ds-blue-deep) !important;margin: 44px 0 16px !important}.entry-content[class] .ts-sec > span{display: block !important;font-family: var(--ds-font-body) !important;font-size: 17px !important;line-height: 1.7 !important;font-weight: 400 !important;color: var(--ds-text) !important;margin: 0 0 16px !important}.entry-content[class] .ts-kicker{display: inline-flex !important;align-items: center;gap: 7px;margin: 0 0 14px !important;padding: 6px 14px !important;border: 1px solid var(--ds-border) !important;border-radius: 999px !important;background: #ffffff !important;color: var(--ds-blue) !important;font-family: var(--ds-font-head) !important;font-size: 13px !important;font-weight: 700 !important;letter-spacing: 0 !important;text-transform: none !important}.entry-content[class] .ts-p,.entry-content[class] .card-desc,.entry-content[class] .aobo-strip-intro,.entry-content[class] .schema-faq-answer{font-family: var(--ds-font-body) !important;font-size: 17px !important;line-height: 1.7 !important;font-weight: 400 !important}.entry-content[class] .lead,.entry-content[class] .fund-lead{font-family: var(--ds-font-body) !important;font-size: 19px !important;line-height: 1.65 !important;font-weight: 400 !important}.entry-content[class] .ts-h2{font-family: var(--ds-font-head) !important;font-size: 30px !important;line-height: 1.25 !important;font-weight: 400 !important;color: var(--ds-blue-deep) !important;margin: 44px 0 16px !important}.entry-content[class] .ts-h3{font-family: var(--ds-font-head) !important;font-size: 23px !important;line-height: 1.3 !important;font-weight: 400 !important;color: var(--ds-blue-deep) !important;margin: 30px 0 12px !important}.entry-content[class] .card-grade{font-family: var(--ds-font-head) !important;font-size: 23px !important;line-height: 1.25 !important;font-weight: 700 !important}.entry-content[class] .schema-faq-question{font-family: var(--ds-font-head) !important;font-size: 19px !important;line-height: 1.4 !important;font-weight: 700 !important;color: var(--ds-blue-deep) !important}.entry-content[class] .ts-source,.entry-content[class] .ts-hint,.entry-content[class] .ts-placeholder,.entry-content[class] .ht-spec-label,.entry-content[class] .ht-spec-value,.entry-content[class] .ht-step-indicator,.entry-content[class] .ht-badge,.entry-content[class] .idx,.entry-content[class] .xlink,.entry-content[class] .cat-note,.entry-content[class] .aobo-card-note,.entry-content[class] .card-desig,.entry-content[class] .k,.entry-content[class] .v,.entry-content[class] .note,.entry-content[class] .aobo-note{font-family: var(--ds-font-head) !important;font-size: 15px !important;line-height: 1.6 !important;font-weight: 400 !important}.entry-content[class] .ht-spec-label,.entry-content[class] .idx,.entry-content[class] .k{font-weight: 700 !important}.entry-content[class] .aobo-note,.entry-content[class] .note{font-family: var(--ds-font-body) !important;color: var(--ds-muted) !important}.entry-content[class] .chip{font-family: var(--ds-font-head) !important;font-size: 13px !important;font-weight: 700 !important}.entry-content[class] .kicker,.entry-content[class] .eyebrow,.entry-content[class] .aobo-eyebrow{display: inline-flex !important;align-items: center;gap: 7px;margin: 0 0 14px !important;padding: 6px 14px !important;border: 1px solid var(--ds-border) !important;border-radius: 999px !important;background: #ffffff !important;color: var(--ds-blue) !important;font-family: var(--ds-font-head) !important;font-size: 13px !important;font-weight: 700 !important;letter-spacing: 0 !important;text-transform: none !important}@media (max-width: 760px){.entry-content[class] h1{font-size: clamp(22px,6.4vw,min(34px,var(--h1-max,34px))) !important}.entry-content[class] h2{font-size: 25px !important}.entry-content[class] h3{font-size: 20px !important}.entry-content[class] h4{font-size: 17px !important}.entry-content[class] p,.entry-content[class] li{font-size: 16px !important}.entry-content[class] table th,.entry-content[class] table td{font-size: 14px !important;padding: 11px 12px !important}.entry-content[class] .aobo-hero{padding: 30px 22px}.entry-content[class] .aobo-final-cta{padding: 26px 22px}.entry-content[class] .aobo-final-cta .aobo-btn{width: 100%}}\n<\/style>\n<section class=\"aobo-ht-ref ts-props\">\n<div class=\"aobo-wrap\">\n<div class=\"ts-hero\">\n<div class=\"ts-hero-top\">\n<div class=\"ts-kicker\"><span><\/span>High Speed Steel | GB Grades | Hardening<\/div>\n<h1 style=\"--h1-max:46px\">GB High Speed Steel Grades: Hardening and Hardness Requirements<\/h1>\n<p>A Chinese high speed steel is ordered by its GB grade name, and the name is the composition. The letters run in the order tungsten, molybdenum, chromium, vanadium and cobalt, and the number after each letter is the nominal percentage of that element, so W6Mo5Cr4V2 is a 6 per cent tungsten, 5 per cent molybdenum, 4 per cent chromium, 2 per cent vanadium grade, the Chinese designation for the grade the rest of the world calls M2. The tables below give the hardening and tempering cycle published for these grades and the minimum hardness the national standard requires of each one.<\/p><\/div>\n<div class=\"ts-tool-area\">\n\n<h2 class=\"ts-h2\">How the GB grade names are built<\/h2>\n<p class=\"ts-p\">The GB grade name is a composition in short form, and once the order of the letters is known the name can be read without a table. W is tungsten, Mo is molybdenum, Cr is chromium, V is vanadium and Co is cobalt, and each letter is followed by the nominal percentage of that element. A grade that carries no cobalt is a plain high speed steel; the ones with cobalt are the grades that keep their hardness at the highest cutting speeds. A leading C in front of the name marks a high carbon version of the same base composition, so CW6Mo5Cr4V2 is the high carbon form of W6Mo5Cr4V2. Al at the end marks an aluminium bearing grade, and Si marks silicon.<\/p>\n<p class=\"ts-p\">GB\/T 9943-2008 is the Chinese standard that lists these grades and sets a minimum hardness for each of them. The tables below are the two views a buyer or a heat treater needs from that family: the first is the hardening cycle published for the common grades, and the second is the hardness the standard requires across the full grade list.<\/p>\n\n<h2 class=\"ts-h2\">Hardening and tempering temperatures<\/h2>\n<p class=\"ts-p\">The grades split into a tungsten group and a tungsten-molybdenum group, and the split shows up in the preheat. The tungsten grades W18Cr4V and W18Cr4VCo5 preheat from 820 to 870 &#176;C, while the tungsten-molybdenum grades start lower, at 730 to 840 &#176;C, because molybdenum lowers the critical temperatures. The austenitizing temperature is given twice on every row, once for a salt bath and once for a box furnace, and the two figures differ because a salt bath heats the tool faster and is run at the lower end of the window.<\/p>\n<p class=\"ts-p\">Every grade in the table is oil quenched and then tempered twice in the range given on its row. Tempering temperature tracks the cobalt content, the cobalt free grades tempering at 540 to 560 &#176;C and the high cobalt grades at 530 to 550 &#176;C.<\/p>\n<h3 class=\"ts-h3\">Preheat, austenitizing, quench medium and tempering temperature<\/h3>\n<div class=\"ts-table-wrap\">\n<table class=\"ts-table\" style=\"min-width:1180px;\">\n<thead><tr><th>Grade<\/th><th>Preheat<br>&#176;C<\/th><th>Austenitizing,<br>salt bath &#176;C<\/th><th>Austenitizing,<br>box furnace &#176;C<\/th><th>Tempering<br>&#176;C<\/th><th>Hardness HRC &#8805;<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>W18Cr4V<\/td><td>820-870<\/td><td>1270-1285<\/td><td>1270-1285<\/td><td>540-560<\/td><td>63<\/td><\/tr>\n<tr><td>W18Cr4VCo5<\/td><td>820-870<\/td><td>1270-1290<\/td><td>1280-1300<\/td><td>540-560<\/td><td>63<\/td><\/tr>\n<tr><td>W18Cr4V2Co8<\/td><td>820-870<\/td><td>1270-1290<\/td><td>1280-1300<\/td><td>540-560<\/td><td>63<\/td><\/tr>\n<tr><td>W12Cr4V5Co5<\/td><td>820-870<\/td><td>1220-1240<\/td><td>1230-1250<\/td><td>530-550<\/td><td>65<\/td><\/tr>\n<tr><td>W6Mo5Cr4V2<\/td><td>730-840<\/td><td>1210-1230<\/td><td>1210-1230<\/td><td>540-560<\/td><td>63 box furnace, 64 salt bath<\/td><\/tr>\n<tr><td>CW6Mo5Cr4V2<\/td><td>730-840<\/td><td>1190-1210<\/td><td>1200-1220<\/td><td>540-560<\/td><td>65<\/td><\/tr>\n<tr><td>W6Mo5Cr4V3<\/td><td>730-840<\/td><td>1190-1210<\/td><td>1200-1220<\/td><td>540-560<\/td><td>64<\/td><\/tr>\n<tr><td>CW6Mo5Cr4V3<\/td><td>730-840<\/td><td>1190-1210<\/td><td>1200-1220<\/td><td>540-560<\/td><td>64<\/td><\/tr>\n<tr><td>W2Mo9Cr4V2<\/td><td>730-840<\/td><td>1190-1210<\/td><td>1200-1220<\/td><td>540-560<\/td><td>65<\/td><\/tr>\n<tr><td>W6Mo5Cr4V2Co5<\/td><td>730-840<\/td><td>1190-1210<\/td><td>1200-1220<\/td><td>540-560<\/td><td>64<\/td><\/tr>\n<tr><td>W7Mo4Cr4V2Co5<\/td><td>730-840<\/td><td>1180-1200<\/td><td>1190-1210<\/td><td>530-550<\/td><td>66<\/td><\/tr>\n<tr><td>W2Mo9Cr4VCo8<\/td><td>730-840<\/td><td>1170-1190<\/td><td>1180-1200<\/td><td>530-550<\/td><td>66<\/td><\/tr>\n<tr><td>W9Mo3Cr4V<\/td><td>820-870<\/td><td>1210-1230<\/td><td>1220-1240<\/td><td>540-560<\/td><td>63 box furnace, 64 salt bath<\/td><\/tr>\n<tr><td>W6Mo5Cr4V2Al<\/td><td>820-870<\/td><td>1230-1240<\/td><td>1230-1240<\/td><td>540-560<\/td><td>65<\/td><\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p class=\"ts-tcap\"><em>Source, \u5200\u5177\u6750\u6599\u901f\u67e5\u624b\u518c, Table 2-15, High speed tool steel grades and hardness, printed pages 38-39. Every grade in the table is oil quenched. The hardness column is the value the grade is required to reach after the quench and temper cycle listed on the same row. This is a reference summary of published practice and not an Aobo Steel specification.<\/em><\/p>\n\n<h2 class=\"ts-h2\">The hardness the standard requires<\/h2>\n<p class=\"ts-p\">Where the first table gives the cycle, the second gives the floor the grade has to reach. GB\/T 9943-2008 sets a minimum Rockwell C hardness for every grade in the standard, and the values run in a narrow band from 63 to 66 HRC. The plain and low alloy grades sit at the bottom of that band and the high carbon, aluminium bearing and cobalt bearing grades sit at the top, which is the same order as their wear resistance and their red hardness.<\/p>\n<h3 class=\"ts-h3\">Minimum hardness by grade, GB\/T 9943-2008<\/h3>\n<div class=\"ts-table-wrap\">\n<table class=\"ts-table\" style=\"min-width:560px;\">\n<thead><tr><th>Grade<\/th><th>Hardness HRC &#8805;<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>W3Mo3Cr4V2<\/td><td>63<\/td><\/tr>\n<tr><td>W4Mo3Cr4VSi<\/td><td>63<\/td><\/tr>\n<tr><td>W18Cr4V<\/td><td>63<\/td><\/tr>\n<tr><td>W2Mo8Cr4V<\/td><td>63<\/td><\/tr>\n<tr><td>W2Mo9Cr4V2<\/td><td>64<\/td><\/tr>\n<tr><td>W6Mo5Cr4V2<\/td><td>64<\/td><\/tr>\n<tr><td>CW3Mo3Cr4V2<\/td><td>64<\/td><\/tr>\n<tr><td>W6Mo6Cr4V2<\/td><td>64<\/td><\/tr>\n<tr><td>W9Mo3Cr4V<\/td><td>64<\/td><\/tr>\n<tr><td>W6Mo5Cr4V3<\/td><td>64<\/td><\/tr>\n<tr><td>CW6Mo5Cr4V3<\/td><td>64<\/td><\/tr>\n<tr><td>W6Mo5Cr4V2Al<\/td><td>65<\/td><\/tr>\n<tr><td>W12Cr4V5Co5<\/td><td>65<\/td><\/tr>\n<tr><td>W6Mo5Cr4V2Co5<\/td><td>64<\/td><\/tr>\n<tr><td>W6Mo5Cr4V3Co8<\/td><td>65<\/td><\/tr>\n<tr><td>W7Mo5Cr4V2Co5<\/td><td>66<\/td><\/tr>\n<tr><td>W2Mo9Cr4VCo8<\/td><td>66<\/td><\/tr>\n<tr><td>W10Mo4Cr4V3Co8<\/td><td>66<\/td><\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p class=\"ts-tcap\"><em>Source, \u5200\u5177\u6750\u6599\u901f\u67e5\u624b\u518c, Table 2-17, Hardness requirements for high speed steel in China (GB\/T 9943-2008), printed page 40. The source prints the grades in two side by side pairs and repeats W6Mo5Cr4V2 in both halves; the grade is listed once here at HRC 64. This is a reference summary of published practice and not an Aobo Steel specification.<\/em><\/p>\n\n<h2 class=\"ts-h2\">How to read the two tables<\/h2>\n<p class=\"ts-p\">Both tables are read against the same grade name, so a row in the first table can be matched to the same grade in the second. The temperatures are in degrees Celsius and the two austenitizing columns are alternatives, not a range to span: a shop with a salt bath uses the salt bath figure and a shop with a box furnace uses the box furnace figure. The hardness figure in the first table is the value obtained on that cycle, and the hardness figure in the second is the minimum the standard allows for the grade, so the two agree on every grade that appears in both.<\/p>\n<p class=\"ts-p\">Two points are worth checking before either table goes onto a process sheet. The hardness in both tables is a minimum after a full quench and a double temper, not a hardness that can be reached by tempering alone, and it applies to a correctly austenitized and fully hardened section. The austenitizing windows are also narrow, from 20 to 40 &#176;C wide on most rows, so a furnace that cannot hold the set point inside that band will move the result more than any tempering change will.<\/p>\n\n<h2 class=\"ts-h2\">Related reference data<\/h2>\n<p class=\"ts-p\">The tungsten-molybdenum grade that most buyers meet first is W6Mo5Cr4V2, the Chinese designation for <a href=\"https:\/\/aobosteel.com\/m2-tool-steel\/\">M2 high speed steel<\/a>, and the cobalt bearing grades W6Mo5Cr4V2Co5 and W2Mo9Cr4VCo8 are the Chinese designations for the grades sold as <a href=\"https:\/\/aobosteel.com\/m35-tool-steel\/\">M35 tool steel<\/a> and <a href=\"https:\/\/aobosteel.com\/m42-tool-steel\/\">M42 tool steel<\/a>. The specification each standard allows for M2 is set out on <a href=\"https:\/\/aobosteel.com\/m2-steel-specifications\/\">M2 high speed steel specifications by standard<\/a>, and the loss of hardness these grades show when they are held at temperature is on <a href=\"https:\/\/aobosteel.com\/high-speed-steel-softening-chart\/\">high speed steel softening chart<\/a>.<\/p>\n<div class=\"ts-dl\">\n          <div class=\"ts-dl-txt\"><strong>GB high speed steel hardening data, printable PDF<\/strong>\n          The hardening and tempering cycle and the GB\/T 9943-2008 minimum hardness for the GB high speed steel grades, in one PDF with our contact details.<\/div>\n          <a class=\"ts-dl-btn\" href=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/10\/Aobo-Steel-GB-High-Speed-Steel-Grades.pdf\" download>\n            <svg viewBox=\"0 0 24 24\" aria-hidden=\"true\"><path d=\"M12 3v12m0 0 4.5-4.5M12 15l-4.5-4.5M4 20h16\"\/><\/svg>\n            Download PDF\n          <\/a>\n        <\/div>\n<p class=\"ts-source\">Compiled from \u5200\u5177\u6750\u6599\u901f\u67e5\u624b\u518c, Table 2-15 on printed pages 38-39 and Table 2-17 on printed page 40. Every figure was read from the page image and then checked against the searchable text of the file, grade by grade. The tables are reproduced as published, with the repeated W6Mo5Cr4V2 row in the second table shown once, and they are a reference summary of published practice rather than an Aobo Steel specification, so confirm the cycle for the grade and the section before it is written into a process sheet.<\/p>\n<\/div><\/div><\/div><\/section>\n\n\n\n","protected":false},"excerpt":{"rendered":"<p>High Speed Steel | GB Grades | Hardening GB High Speed Steel Grades: Hardening and Hardness Requirements A Chinese high speed steel is ordered by its GB grade name, and the name is the composition. The letters run in the order tungsten, molybdenum, chromium, vanadium and cobalt, and the number after each letter is the [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"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":"","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":"default","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-20549","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.6 (Yoast SEO v28.6) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>GB High Speed Steel Grades and Hardness (GB\/T 9943-2008)<\/title>\n<meta name=\"description\" content=\"Hardening and tempering temperatures, quench medium and the minimum hardness GB\/T 9943-2008 requires for Chinese high speed steel grades from W18Cr4V to W6Mo5Cr4V2.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/aobosteel.com\/es\/gb-high-speed-steel-grades\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"GB High Speed Steel Grades: Hardening and Hardness Requirements\" \/>\n<meta property=\"og:description\" content=\"Hardening and tempering temperatures, quench medium and the minimum hardness GB\/T 9943-2008 requires for Chinese high speed steel grades from W18Cr4V to W6Mo5Cr4V2.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/aobosteel.com\/es\/gb-high-speed-steel-grades\/\" \/>\n<meta property=\"og:site_name\" content=\"AoboSteel\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/profile.php?id=61565368220197\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Tiempo de lectura\" \/>\n\t<meta name=\"twitter:data1\" content=\"6 minutos\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"TechArticle\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/gb-high-speed-steel-grades\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/gb-high-speed-steel-grades\\\/\"},\"author\":{\"name\":\"Evan\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/#\\\/schema\\\/person\\\/96118415c30ca6bb52eaf1127b052ef7\"},\"headline\":\"GB High Speed Steel Grades: Hardening and Hardness Requirements\",\"datePublished\":\"2026-10-02T01:07:44+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/gb-high-speed-steel-grades\\\/\"},\"wordCount\":1308,\"publisher\":{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/#organization\"},\"inLanguage\":\"es\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/gb-high-speed-steel-grades\\\/\",\"url\":\"https:\\\/\\\/aobosteel.com\\\/gb-high-speed-steel-grades\\\/\",\"name\":\"GB High Speed Steel Grades and Hardness (GB\\\/T 9943-2008)\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/#website\"},\"datePublished\":\"2026-10-02T01:07:44+00:00\",\"description\":\"Hardening and tempering temperatures, quench medium and the minimum hardness GB\\\/T 9943-2008 requires for Chinese high speed steel grades from W18Cr4V to W6Mo5Cr4V2.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/gb-high-speed-steel-grades\\\/#breadcrumb\"},\"inLanguage\":\"es\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/aobosteel.com\\\/gb-high-speed-steel-grades\\\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/gb-high-speed-steel-grades\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u9996\u9875\",\"item\":\"https:\\\/\\\/aobosteel.com\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"GB High Speed Steel Grades: Hardening and Hardness Requirements\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/#website\",\"url\":\"https:\\\/\\\/aobosteel.com\\\/\",\"name\":\"AoboSteel\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/aobosteel.com\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"es\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/#organization\",\"name\":\"AoboSteel\",\"url\":\"https:\\\/\\\/aobosteel.com\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"es\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/aobosteel.com\\\/wp-content\\\/uploads\\\/2025\\\/01\\\/cropped-aobo-steel-1.avif\",\"contentUrl\":\"https:\\\/\\\/aobosteel.com\\\/wp-content\\\/uploads\\\/2025\\\/01\\\/cropped-aobo-steel-1.avif\",\"width\":1052,\"height\":592,\"caption\":\"AoboSteel\"},\"image\":{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/#\\\/schema\\\/logo\\\/image\\\/\"},\"sameAs\":[\"https:\\\/\\\/www.facebook.com\\\/profile.php?id=61565368220197\",\"https:\\\/\\\/www.linkedin.com\\\/in\\\/aobosteel-evan\\\/\"]},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/#\\\/schema\\\/person\\\/96118415c30ca6bb52eaf1127b052ef7\",\"name\":\"Evan\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"es\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/8e402f2e6f36093f0bf1855dbf79269cde23cd659c44eefdd7ecf7ff9c05786f?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/8e402f2e6f36093f0bf1855dbf79269cde23cd659c44eefdd7ecf7ff9c05786f?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/8e402f2e6f36093f0bf1855dbf79269cde23cd659c44eefdd7ecf7ff9c05786f?s=96&d=mm&r=g\",\"caption\":\"Evan\"},\"sameAs\":[\"http:\\\/\\\/www.aobosteel.com\",\"https:\\\/\\\/www.facebook.com\\\/profile.php?id=61565368220197\",\"https:\\\/\\\/www.instagram.com\\\/aobosteel\\\/\",\"https:\\\/\\\/www.linkedin.com\\\/in\\\/aobosteel-evan\\\/\",\"https:\\\/\\\/x.com\\\/AobosteelEvan\",\"https:\\\/\\\/www.youtube.com\\\/@aobosteel\"],\"url\":\"https:\\\/\\\/aobosteel.com\\\/es\\\/blog\\\/author\\\/admin\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"GB High Speed Steel Grades and Hardness (GB\/T 9943-2008)","description":"Hardening and tempering temperatures, quench medium and the minimum hardness GB\/T 9943-2008 requires for Chinese high speed steel grades from W18Cr4V to W6Mo5Cr4V2.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/aobosteel.com\/es\/gb-high-speed-steel-grades\/","og_locale":"es_ES","og_type":"article","og_title":"GB High Speed Steel Grades: Hardening and Hardness Requirements","og_description":"Hardening and tempering temperatures, quench medium and the minimum hardness GB\/T 9943-2008 requires for Chinese high speed steel grades from W18Cr4V to W6Mo5Cr4V2.","og_url":"https:\/\/aobosteel.com\/es\/gb-high-speed-steel-grades\/","og_site_name":"AoboSteel","article_publisher":"https:\/\/www.facebook.com\/profile.php?id=61565368220197","twitter_card":"summary_large_image","twitter_misc":{"Tiempo de lectura":"6 minutos"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"TechArticle","@id":"https:\/\/aobosteel.com\/gb-high-speed-steel-grades\/#article","isPartOf":{"@id":"https:\/\/aobosteel.com\/gb-high-speed-steel-grades\/"},"author":{"name":"Evan","@id":"https:\/\/aobosteel.com\/#\/schema\/person\/96118415c30ca6bb52eaf1127b052ef7"},"headline":"GB High Speed Steel Grades: Hardening and Hardness Requirements","datePublished":"2026-10-02T01:07:44+00:00","mainEntityOfPage":{"@id":"https:\/\/aobosteel.com\/gb-high-speed-steel-grades\/"},"wordCount":1308,"publisher":{"@id":"https:\/\/aobosteel.com\/#organization"},"inLanguage":"es"},{"@type":"WebPage","@id":"https:\/\/aobosteel.com\/gb-high-speed-steel-grades\/","url":"https:\/\/aobosteel.com\/gb-high-speed-steel-grades\/","name":"GB High Speed Steel Grades and Hardness (GB\/T 9943-2008)","isPartOf":{"@id":"https:\/\/aobosteel.com\/#website"},"datePublished":"2026-10-02T01:07:44+00:00","description":"Hardening and tempering temperatures, quench medium and the minimum hardness GB\/T 9943-2008 requires for Chinese high speed steel grades from W18Cr4V to W6Mo5Cr4V2.","breadcrumb":{"@id":"https:\/\/aobosteel.com\/gb-high-speed-steel-grades\/#breadcrumb"},"inLanguage":"es","potentialAction":[{"@type":"ReadAction","target":["https:\/\/aobosteel.com\/gb-high-speed-steel-grades\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/aobosteel.com\/gb-high-speed-steel-grades\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"\u9996\u9875","item":"https:\/\/aobosteel.com\/"},{"@type":"ListItem","position":2,"name":"GB High Speed Steel Grades: Hardening and Hardness Requirements"}]},{"@type":"WebSite","@id":"https:\/\/aobosteel.com\/#website","url":"https:\/\/aobosteel.com\/","name":"AoboSteel","description":"","publisher":{"@id":"https:\/\/aobosteel.com\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/aobosteel.com\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"es"},{"@type":"Organization","@id":"https:\/\/aobosteel.com\/#organization","name":"AoboSteel","url":"https:\/\/aobosteel.com\/","logo":{"@type":"ImageObject","inLanguage":"es","@id":"https:\/\/aobosteel.com\/#\/schema\/logo\/image\/","url":"https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/01\/cropped-aobo-steel-1.avif","contentUrl":"https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/01\/cropped-aobo-steel-1.avif","width":1052,"height":592,"caption":"AoboSteel"},"image":{"@id":"https:\/\/aobosteel.com\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/profile.php?id=61565368220197","https:\/\/www.linkedin.com\/in\/aobosteel-evan\/"]},{"@type":"Person","@id":"https:\/\/aobosteel.com\/#\/schema\/person\/96118415c30ca6bb52eaf1127b052ef7","name":"Evan","image":{"@type":"ImageObject","inLanguage":"es","@id":"https:\/\/secure.gravatar.com\/avatar\/8e402f2e6f36093f0bf1855dbf79269cde23cd659c44eefdd7ecf7ff9c05786f?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/8e402f2e6f36093f0bf1855dbf79269cde23cd659c44eefdd7ecf7ff9c05786f?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/8e402f2e6f36093f0bf1855dbf79269cde23cd659c44eefdd7ecf7ff9c05786f?s=96&d=mm&r=g","caption":"Evan"},"sameAs":["http:\/\/www.aobosteel.com","https:\/\/www.facebook.com\/profile.php?id=61565368220197","https:\/\/www.instagram.com\/aobosteel\/","https:\/\/www.linkedin.com\/in\/aobosteel-evan\/","https:\/\/x.com\/AobosteelEvan","https:\/\/www.youtube.com\/@aobosteel"],"url":"https:\/\/aobosteel.com\/es\/blog\/author\/admin\/"}]}},"uagb_featured_image_src":{"full":false,"thumbnail":false,"medium":false,"medium_large":false,"large":false,"1536x1536":false,"2048x2048":false,"trp-custom-language-flag":false},"uagb_author_info":{"display_name":"Evan","author_link":"https:\/\/aobosteel.com\/es\/blog\/author\/admin\/"},"uagb_comment_info":0,"uagb_excerpt":"High Speed Steel | GB Grades | Hardening GB High Speed Steel Grades: Hardening and Hardness Requirements A Chinese high speed steel is ordered by its GB grade name, and the name is the composition. The letters run in the order tungsten, molybdenum, chromium, vanadium and cobalt, and the number after each letter is the&hellip;","rttpg_featured_image_url":null,"rttpg_author":{"display_name":"Evan","author_link":"https:\/\/aobosteel.com\/es\/blog\/author\/admin\/"},"rttpg_comment":0,"rttpg_category":null,"rttpg_excerpt":"High Speed Steel | GB Grades | Hardening GB High Speed Steel Grades: Hardening and Hardness Requirements A Chinese high speed steel is ordered by its GB grade name, and the name is the composition. The letters run in the order tungsten, molybdenum, chromium, vanadium and cobalt, and the number after each letter is the&hellip;","_links":{"self":[{"href":"https:\/\/aobosteel.com\/es\/wp-json\/wp\/v2\/pages\/20549","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/aobosteel.com\/es\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/aobosteel.com\/es\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/aobosteel.com\/es\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/aobosteel.com\/es\/wp-json\/wp\/v2\/comments?post=20549"}],"version-history":[{"count":1,"href":"https:\/\/aobosteel.com\/es\/wp-json\/wp\/v2\/pages\/20549\/revisions"}],"predecessor-version":[{"id":20550,"href":"https:\/\/aobosteel.com\/es\/wp-json\/wp\/v2\/pages\/20549\/revisions\/20550"}],"wp:attachment":[{"href":"https:\/\/aobosteel.com\/es\/wp-json\/wp\/v2\/media?parent=20549"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}