{"id":13540,"date":"2026-03-12T12:03:35","date_gmt":"2026-03-12T04:03:35","guid":{"rendered":"https:\/\/aobosteel.com\/?page_id=13540"},"modified":"2026-03-12T19:20:34","modified_gmt":"2026-03-12T11:20:34","slug":"h13-vs-skd61-tool-steel","status":"publish","type":"page","link":"https:\/\/aobosteel.com\/pt\/h13-vs-skd61-tool-steel\/","title":{"rendered":"A\u00e7o ferramenta H13 vs SKD61: S\u00e3o iguais? | Aobo Steel"},"content":{"rendered":"<div class=\"wp-block-uagb-container uagb-block-b19fe397 alignfull uagb-is-root-container\"><div class=\"uagb-container-inner-blocks-wrap\">\n<h1 class=\"wp-block-heading has-text-align-center\" id=\"h-h13-vs-skd61-tool-steel\">A\u00e7o ferramenta H13 vs SKD61<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">H13 e SKD61 s\u00e3o duas designa\u00e7\u00f5es de a\u00e7o ferramenta para trabalho a quente definidas em normas diferentes, mas geralmente tratadas como equivalentes em aplica\u00e7\u00f5es internacionais de ferramentas. Como n\u00e3o s\u00e3o especificadas pelo mesmo sistema, engenheiros e compradores devem verificar os limites qu\u00edmicos e a certifica\u00e7\u00e3o antes de consider\u00e1-las substitutas diretas.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Para uma vis\u00e3o geral mais ampla das equival\u00eancias entre padr\u00f5es e compara\u00e7\u00f5es de notas, consulte o <a href=\"https:\/\/aobosteel.com\/pt\/h13-equivalent-comparison-guide\/\">Guia de Equival\u00eancia e Compara\u00e7\u00e3o do H13<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">H13 e SKD61 s\u00e3o a mesma coisa?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Na pr\u00e1tica industrial, o SKD61 \u00e9 geralmente considerado o equivalente japon\u00eas do H13. Ambos os a\u00e7os pertencem \u00e0 mesma fam\u00edlia de a\u00e7os-ferramenta para trabalho a quente, \u00e0 base de cromo-molibd\u00eanio-van\u00e1dio, e s\u00e3o destinados a ferramentas expostas a altas temperaturas, tens\u00f5es mec\u00e2nicas e ciclos t\u00e9rmicos.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Estritamente falando, por\u00e9m, eles n\u00e3o s\u00e3o id\u00eanticos. H13 e SKD61 s\u00e3o definidos por normas diferentes, e suas faixas de composi\u00e7\u00e3o qu\u00edmica permitidas n\u00e3o s\u00e3o exatamente as mesmas. Por esse motivo, a substitui\u00e7\u00e3o deve ser confirmada de acordo com a especifica\u00e7\u00e3o exigida e o relat\u00f3rio de ensaio do material para o lote fornecido.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Designa\u00e7\u00f5es regionais<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">H13 \u00e9 uma designa\u00e7\u00e3o americana de a\u00e7o ferramenta para trabalho a quente, definida pelas normas ASTM A681 e AISI. Pertence \u00e0 s\u00e9rie H de a\u00e7os cromo para trabalho a quente.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">SKD61 \u00e9 definido pela norma JIS G4404, a norma industrial japonesa para a\u00e7os-ferramenta. \u00c9 a designa\u00e7\u00e3o japonesa mais comumente associada ao H13 em discuss\u00f5es sobre ferramentas para trabalho a quente.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Compara\u00e7\u00e3o da composi\u00e7\u00e3o qu\u00edmica<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A tabela abaixo mostra as faixas de composi\u00e7\u00e3o t\u00edpicas definidas pelas duas normas.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>Elemento<\/td><td>ASTM A681 H13 (peso %)<\/td><td>JIS G4404 SKD61 (peso %)<\/td><\/tr><tr><td>Carbono (C)<\/td><td>0,32 \u2013 0,45<\/td><td>0,32 \u2013 0,42<\/td><\/tr><tr><td>Sil\u00edcio (Si)<\/td><td>0,80 \u2013 1,25<\/td><td>0,80 \u2013 1,20<\/td><\/tr><tr><td>Mangan\u00eas (Mn)<\/td><td>0,20 \u2013 0,60<\/td><td>0,50 (m\u00e1ximo \/ nominal)<\/td><\/tr><tr><td>Cromo (Cr)<\/td><td>4,75 \u2013 5,50<\/td><td>4.50 \u2013 5.50<\/td><\/tr><tr><td>Molibd\u00eanio (Mo)<\/td><td>1,10 \u2013 1,75<\/td><td>1.00 \u2013 1.50<\/td><\/tr><tr><td>Van\u00e1dio (V)<\/td><td>0,80 \u2013 1,20<\/td><td>0,80 \u2013 1,20<\/td><\/tr><tr><td>F\u00f3sforo (P)<\/td><td>0,030 m\u00e1ximo<\/td><td>0,030 m\u00e1ximo<\/td><\/tr><tr><td>Enxofre (S)<\/td><td>0,030 m\u00e1ximo<\/td><td>0,030 m\u00e1ximo<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">A grande sobreposi\u00e7\u00e3o nas \u00e1reas da qu\u00edmica \u00e9 o principal motivo pelo qual as duas categorias s\u00e3o frequentemente referenciadas de forma cruzada no com\u00e9rcio internacional.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nota sobre propriedades mec\u00e2nicas:<br>Propriedades mec\u00e2nicas como dureza, resist\u00eancia e tenacidade ao impacto dependem muito do tratamento t\u00e9rmico e das pr\u00e1ticas de fabrica\u00e7\u00e3o, e n\u00e3o apenas da classifica\u00e7\u00e3o do material.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Semelhan\u00e7as entre H13 e SKD61<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Mesma fam\u00edlia de ligas. Ambas as classes s\u00e3o a\u00e7os-ferramenta para trabalho a quente, \u00e0 base de cromo-molibd\u00eanio-van\u00e1dio, destinados ao servi\u00e7o em altas temperaturas.<\/li>\n\n\n\n<li>Composi\u00e7\u00e3o qu\u00edmica semelhante. As faixas de liga especificadas s\u00e3o muito similares, especialmente em cromo, molibd\u00eanio e van\u00e1dio. Essa similaridade na composi\u00e7\u00e3o da liga \u00e9 o motivo pelo qual s\u00e3o frequentemente consideradas equivalentes.<\/li>\n\n\n\n<li>Ambientes de servi\u00e7o semelhantes. Ambas as classes s\u00e3o utilizadas em ambientes exigentes de ferramentas para trabalho a quente, como fundi\u00e7\u00e3o sob press\u00e3o, forjamento, extrus\u00e3o a quente, pinos de n\u00facleo e mandris.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Principais diferen\u00e7as entre H13 e SKD61<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Embora as duas categorias sejam bastante equivalentes, suas especifica\u00e7\u00f5es n\u00e3o s\u00e3o id\u00eanticas.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Faixa de carbono. O SKD61 possui uma faixa de carbono ligeiramente mais estreita, com um limite superior de 0,42%, enquanto o H13 permite at\u00e9 0,45%.<\/li>\n\n\n\n<li>Limite de molibd\u00eanio. A norma H13 permite at\u00e9 1,75% de molibd\u00eanio, enquanto a SKD61 limita a 1,50%.<\/li>\n\n\n\n<li>Teor m\u00ednimo de cromo. A norma H13 especifica um teor m\u00ednimo de cromo ligeiramente superior, de 4,75%, enquanto a SKD61 come\u00e7a em 4,50%.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Essas diferen\u00e7as s\u00e3o pequenas, mas mostram que H13 e SKD61 s\u00e3o classes equivalentes, e n\u00e3o especifica\u00e7\u00f5es id\u00eanticas.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Considera\u00e7\u00f5es sobre substitui\u00e7\u00e3o<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Em muitas aplica\u00e7\u00f5es de ferramentas, H13 e SKD61 podem ser substitu\u00eddos um pelo outro sem grandes diferen\u00e7as pr\u00e1ticas. No entanto, a substitui\u00e7\u00e3o deve ser verificada em rela\u00e7\u00e3o \u00e0 norma exigida.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Por exemplo, um lote de H13 contendo 1,70% de molibd\u00eanio estaria em conformidade com a norma ASTM A681, mas ficaria fora do limite de molibd\u00eanio SKD61 segundo a norma JIS G4404. Nesse caso, o material est\u00e1 em conformidade com uma norma, mas n\u00e3o com a outra.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Por esse motivo, engenheiros e compradores devem confirmar se o calor fornecido corresponde \u00e0s especifica\u00e7\u00f5es exigidas pelo desenho, pedido de compra ou cliente final.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Conclus\u00e3o<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/aobosteel.com\/pt\/h13-tool-steel\/\">H13<\/a> Os a\u00e7os SKD61 e SKD62 s\u00e3o classes de a\u00e7os para trabalho a quente intimamente relacionadas, definidas por normas americanas e japonesas. Sua composi\u00e7\u00e3o qu\u00edmica e condi\u00e7\u00f5es de servi\u00e7o previstas s\u00e3o suficientemente semelhantes para que sejam frequentemente tratados como equivalentes em aplica\u00e7\u00f5es de ferramentas.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"h-\">No entanto, n\u00e3o s\u00e3o normas perfeitamente id\u00eanticas. Verificar o relat\u00f3rio de ensaio do material e os limites de especifica\u00e7\u00e3o ajuda a garantir que o lote fornecido atenda \u00e0 designa\u00e7\u00e3o exigida.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-related-pages\">P\u00e1ginas relacionadas<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/aobosteel.com\/pt\/is-h13-the-same-as-1-2344\/\">H13 \u00e9 o mesmo que 1.2344?<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/aobosteel.com\/pt\/h13-vs-4cr5mosiv1\/\">H13 vs 4Cr5MoSiV1<\/a><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-faq\">Perguntas frequentes<\/h2>\n\n\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1773287985283\"><strong class=\"schema-faq-question\"><strong>O a\u00e7o ferramenta H13 \u00e9 o mesmo que o SKD61?<\/strong><\/strong> <p class=\"schema-faq-answer\">Embora sejam frequentemente tratados como equivalentes no uso industrial, eles n\u00e3o s\u00e3o id\u00eanticos. S\u00e3o definidos por normas diferentes e possuem faixas de valores qu\u00edmicos permitidos ligeiramente diferentes.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1773288046296\"><strong class=\"schema-faq-question\"><strong>Qual a diferen\u00e7a entre ASTM H13 e JIS SKD61?<\/strong><\/strong> <p class=\"schema-faq-answer\">O H13 \u00e9 um a\u00e7o ferramenta americano para trabalho a quente, definido pelas normas ASTM A681 e AISI. O SKD61 \u00e9 definido pela norma JIS G4404, a norma industrial japonesa para a\u00e7os ferramenta.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1773288046899\"><strong class=\"schema-faq-question\"><strong>Posso substituir o SKD61 pelo H13?<\/strong><\/strong> <p class=\"schema-faq-answer\">Em muitas aplica\u00e7\u00f5es, eles podem ser substitu\u00eddos sem grandes diferen\u00e7as pr\u00e1ticas. No entanto, os engenheiros devem verificar se o lote espec\u00edfico do material est\u00e1 em conformidade com os limites e padr\u00f5es qu\u00edmicos exigidos.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1773288047844\"><strong class=\"schema-faq-question\"><strong>Quais s\u00e3o as diferen\u00e7as qu\u00edmicas entre H13 e SKD61?<\/strong><\/strong> <p class=\"schema-faq-answer\">A norma H13 permite n\u00edveis m\u00e1ximos mais elevados de carbono (0,45% em vez de 0,42%) e molibd\u00eanio (1,75% em vez de 1,50%). A norma H13 tamb\u00e9m especifica um teor m\u00ednimo de cromo ligeiramente superior, de 4,75%.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1773288087348\"><strong class=\"schema-faq-question\"><strong>Para que s\u00e3o utilizados os a\u00e7os ferramenta H13 e SKD61?<\/strong><\/strong> <p class=\"schema-faq-answer\">Ambos s\u00e3o utilizados em ferramentas de alta temperatura expostas a tens\u00f5es mec\u00e2nicas e ciclos t\u00e9rmicos. As aplica\u00e7\u00f5es comuns incluem fundi\u00e7\u00e3o sob press\u00e3o, forjamento, extrus\u00e3o a quente, pinos de n\u00facleo e mandris.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1773288098442\"><strong class=\"schema-faq-question\"><strong>Por que o SKD61 \u00e9 considerado o equivalente japon\u00eas do H13?<\/strong><\/strong> <p class=\"schema-faq-answer\">S\u00e3o considerados equivalentes porque pertencem \u00e0 mesma fam\u00edlia de ligas de cromo-molibd\u00eanio-van\u00e1dio. Seus projetos qu\u00edmicos e ambientes de servi\u00e7o previstos apresentam sobreposi\u00e7\u00e3o significativa.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1773288108228\"><strong class=\"schema-faq-question\"><strong>Os materiais H13 e SKD61 possuem as mesmas propriedades mec\u00e2nicas?<\/strong><\/strong> <p class=\"schema-faq-answer\">Propriedades mec\u00e2nicas como dureza e tenacidade dependem mais do tratamento t\u00e9rmico e do processo de fabrica\u00e7\u00e3o do que da classifica\u00e7\u00e3o da classe em si. Ambos os materiais s\u00e3o projetados para ambientes de servi\u00e7o exigentes semelhantes.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1773288109213\"><strong class=\"schema-faq-question\"><strong>O que deve ser verificado antes de substituir esses a\u00e7os para ferramentas?<\/strong><\/strong> <p class=\"schema-faq-answer\">A substitui\u00e7\u00e3o deve ser confirmada de acordo com as especifica\u00e7\u00f5es exigidas e o relat\u00f3rio de ensaio do material para o lote fornecido. Isso garante que o metal atenda \u00e0s necessidades espec\u00edficas do pedido de compra.<\/p> <\/div> <\/div>\n<\/div><\/div>","protected":false},"excerpt":{"rendered":"<p>H13 vs SKD61 Tool Steel H13 and SKD61 are two hot-work tool steel designations defined in different standards but commonly treated as equivalent grades in international tooling applications. Because they are not specified under the same system, engineers and buyers should verify chemical limits and certification before treating them as direct substitutes. For a broader [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"content-type":"","_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"disabled","ast-breadcrumbs-content":"","ast-featured-img":"","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-13540","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.9 (Yoast SEO v27.9) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>H13 vs SKD61 Tool Steel: Are They the Same? | Aobo Steel<\/title>\n<meta name=\"description\" content=\"Compare H13 vs SKD61 tool steel. Learn whether SKD61 is equivalent to H13, the key chemical differences, and when the two grades can be substituted in hot-work tooling.\" \/>\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\/pt\/h13-vs-skd61-tool-steel\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"H13 vs SKD61 Tool Steel: Are They the Same? | Aobo Steel\" \/>\n<meta property=\"og:description\" content=\"Compare H13 vs SKD61 tool steel. Learn whether SKD61 is equivalent to H13, the key chemical differences, and when the two grades can be substituted in hot-work tooling.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/aobosteel.com\/pt\/h13-vs-skd61-tool-steel\/\" \/>\n<meta property=\"og:site_name\" content=\"AoboSteel\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/profile.php?id=61565368220197\" \/>\n<meta property=\"article:modified_time\" content=\"2026-03-12T11:20:34+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. tempo de leitura\" \/>\n\t<meta name=\"twitter:data1\" content=\"5 minutos\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"TechArticle\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/h13-vs-skd61-tool-steel\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/h13-vs-skd61-tool-steel\\\/\"},\"author\":{\"name\":\"Evan\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/#\\\/schema\\\/person\\\/96118415c30ca6bb52eaf1127b052ef7\"},\"headline\":\"H13 vs SKD61 Tool Steel: Are They the Same? | Aobo Steel\",\"datePublished\":\"2026-03-12T04:03:35+00:00\",\"dateModified\":\"2026-03-12T11:20:34+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/h13-vs-skd61-tool-steel\\\/\"},\"wordCount\":904,\"publisher\":{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/#organization\"},\"inLanguage\":\"pt-BR\"},{\"@type\":[\"WebPage\",\"FAQPage\"],\"@id\":\"https:\\\/\\\/aobosteel.com\\\/h13-vs-skd61-tool-steel\\\/\",\"url\":\"https:\\\/\\\/aobosteel.com\\\/h13-vs-skd61-tool-steel\\\/\",\"name\":\"H13 vs SKD61 Tool Steel: Are They the Same? | Aobo Steel\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/#website\"},\"datePublished\":\"2026-03-12T04:03:35+00:00\",\"dateModified\":\"2026-03-12T11:20:34+00:00\",\"description\":\"Compare H13 vs SKD61 tool steel. Learn whether SKD61 is equivalent to H13, the key chemical differences, and when the two grades can be substituted in hot-work tooling.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/h13-vs-skd61-tool-steel\\\/#breadcrumb\"},\"mainEntity\":[{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/h13-vs-skd61-tool-steel\\\/#faq-question-1773287985283\"},{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/h13-vs-skd61-tool-steel\\\/#faq-question-1773288046296\"},{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/h13-vs-skd61-tool-steel\\\/#faq-question-1773288046899\"},{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/h13-vs-skd61-tool-steel\\\/#faq-question-1773288047844\"},{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/h13-vs-skd61-tool-steel\\\/#faq-question-1773288087348\"},{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/h13-vs-skd61-tool-steel\\\/#faq-question-1773288098442\"},{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/h13-vs-skd61-tool-steel\\\/#faq-question-1773288108228\"},{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/h13-vs-skd61-tool-steel\\\/#faq-question-1773288109213\"}],\"inLanguage\":\"pt-BR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/aobosteel.com\\\/h13-vs-skd61-tool-steel\\\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/h13-vs-skd61-tool-steel\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u9996\u9875\",\"item\":\"https:\\\/\\\/aobosteel.com\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"H13 vs SKD61 Tool Steel: Are They the Same? | Aobo Steel\"}]},{\"@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\":\"pt-BR\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/#organization\",\"name\":\"AoboSteel\",\"url\":\"https:\\\/\\\/aobosteel.com\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"pt-BR\",\"@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\":\"pt-BR\",\"@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\\\/pt\\\/blog\\\/author\\\/admin\\\/\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/h13-vs-skd61-tool-steel\\\/#faq-question-1773287985283\",\"position\":1,\"url\":\"https:\\\/\\\/aobosteel.com\\\/h13-vs-skd61-tool-steel\\\/#faq-question-1773287985283\",\"name\":\"Is H13 tool steel the same as SKD61?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"While commonly treated as equivalents in industrial use, they are not identical. They are defined by different standards and have slightly different allowable chemical ranges.\",\"inLanguage\":\"pt-BR\"},\"inLanguage\":\"pt-BR\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/h13-vs-skd61-tool-steel\\\/#faq-question-1773288046296\",\"position\":2,\"url\":\"https:\\\/\\\/aobosteel.com\\\/h13-vs-skd61-tool-steel\\\/#faq-question-1773288046296\",\"name\":\"What is the difference between ASTM H13 and JIS SKD61?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"H13 is an American hot-work tool steel defined under ASTM A681 and AISI. SKD61 is defined under JIS G4404, the Japanese Industrial Standard for tool steels.\",\"inLanguage\":\"pt-BR\"},\"inLanguage\":\"pt-BR\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/h13-vs-skd61-tool-steel\\\/#faq-question-1773288046899\",\"position\":3,\"url\":\"https:\\\/\\\/aobosteel.com\\\/h13-vs-skd61-tool-steel\\\/#faq-question-1773288046899\",\"name\":\"Can I substitute SKD61 for H13?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"In many applications, they can be substituted without major practical differences. However, engineers must verify that the specific material batch complies with the required chemical limits and standards.\",\"inLanguage\":\"pt-BR\"},\"inLanguage\":\"pt-BR\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/h13-vs-skd61-tool-steel\\\/#faq-question-1773288047844\",\"position\":4,\"url\":\"https:\\\/\\\/aobosteel.com\\\/h13-vs-skd61-tool-steel\\\/#faq-question-1773288047844\",\"name\":\"What are the chemical differences between H13 and SKD61?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"H13 allows higher maximum levels of carbon (0.45% vs 0.42%) and molybdenum (1.75% vs 1.50%). H13 also specifies a slightly higher minimum chromium content of 4.75%.\",\"inLanguage\":\"pt-BR\"},\"inLanguage\":\"pt-BR\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/h13-vs-skd61-tool-steel\\\/#faq-question-1773288087348\",\"position\":5,\"url\":\"https:\\\/\\\/aobosteel.com\\\/h13-vs-skd61-tool-steel\\\/#faq-question-1773288087348\",\"name\":\"What are H13 and SKD61 tool steels used for?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Both are used for high-temperature tooling exposed to mechanical stress and thermal cycling. Common applications include die casting, forging, hot extrusion, core pins, and mandrels.\",\"inLanguage\":\"pt-BR\"},\"inLanguage\":\"pt-BR\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/h13-vs-skd61-tool-steel\\\/#faq-question-1773288098442\",\"position\":6,\"url\":\"https:\\\/\\\/aobosteel.com\\\/h13-vs-skd61-tool-steel\\\/#faq-question-1773288098442\",\"name\":\"Why is SKD61 considered the Japanese equivalent of H13?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"They are considered equivalents because they belong to the same chromium-molybdenum-vanadium alloy family. Their chemical designs and intended service environments have significant overlap.\",\"inLanguage\":\"pt-BR\"},\"inLanguage\":\"pt-BR\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/h13-vs-skd61-tool-steel\\\/#faq-question-1773288108228\",\"position\":7,\"url\":\"https:\\\/\\\/aobosteel.com\\\/h13-vs-skd61-tool-steel\\\/#faq-question-1773288108228\",\"name\":\"Do H13 and SKD61 have the same mechanical properties?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Mechanical properties like hardness and toughness depend more on heat treatment and manufacturing than on the grade designation alone. Both are designed for similar demanding service environments.\",\"inLanguage\":\"pt-BR\"},\"inLanguage\":\"pt-BR\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/h13-vs-skd61-tool-steel\\\/#faq-question-1773288109213\",\"position\":8,\"url\":\"https:\\\/\\\/aobosteel.com\\\/h13-vs-skd61-tool-steel\\\/#faq-question-1773288109213\",\"name\":\"What should be verified before substituting these tool steels?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Substitution should be confirmed against the required specification and the material test report for the supplied batch. This ensures the metal meets the specific needs of the purchase order.\",\"inLanguage\":\"pt-BR\"},\"inLanguage\":\"pt-BR\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"A\u00e7o ferramenta H13 vs SKD61: S\u00e3o iguais? | Aobo Steel","description":"Compare o a\u00e7o ferramenta H13 com o SKD61. Saiba se o SKD61 \u00e9 equivalente ao H13, as principais diferen\u00e7as qu\u00edmicas e quando os dois tipos de a\u00e7o podem ser usados como substitutos em ferramentas para trabalho a quente.","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\/pt\/h13-vs-skd61-tool-steel\/","og_locale":"pt_BR","og_type":"article","og_title":"H13 vs SKD61 Tool Steel: Are They the Same? | Aobo Steel","og_description":"Compare H13 vs SKD61 tool steel. Learn whether SKD61 is equivalent to H13, the key chemical differences, and when the two grades can be substituted in hot-work tooling.","og_url":"https:\/\/aobosteel.com\/pt\/h13-vs-skd61-tool-steel\/","og_site_name":"AoboSteel","article_publisher":"https:\/\/www.facebook.com\/profile.php?id=61565368220197","article_modified_time":"2026-03-12T11:20:34+00:00","twitter_card":"summary_large_image","twitter_misc":{"Est. tempo de leitura":"5 minutos"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"TechArticle","@id":"https:\/\/aobosteel.com\/h13-vs-skd61-tool-steel\/#article","isPartOf":{"@id":"https:\/\/aobosteel.com\/h13-vs-skd61-tool-steel\/"},"author":{"name":"Evan","@id":"https:\/\/aobosteel.com\/#\/schema\/person\/96118415c30ca6bb52eaf1127b052ef7"},"headline":"H13 vs SKD61 Tool Steel: Are They the Same? | Aobo Steel","datePublished":"2026-03-12T04:03:35+00:00","dateModified":"2026-03-12T11:20:34+00:00","mainEntityOfPage":{"@id":"https:\/\/aobosteel.com\/h13-vs-skd61-tool-steel\/"},"wordCount":904,"publisher":{"@id":"https:\/\/aobosteel.com\/#organization"},"inLanguage":"pt-BR"},{"@type":["WebPage","FAQPage"],"@id":"https:\/\/aobosteel.com\/h13-vs-skd61-tool-steel\/","url":"https:\/\/aobosteel.com\/h13-vs-skd61-tool-steel\/","name":"A\u00e7o ferramenta H13 vs SKD61: S\u00e3o iguais? | Aobo Steel","isPartOf":{"@id":"https:\/\/aobosteel.com\/#website"},"datePublished":"2026-03-12T04:03:35+00:00","dateModified":"2026-03-12T11:20:34+00:00","description":"Compare o a\u00e7o ferramenta H13 com o SKD61. Saiba se o SKD61 \u00e9 equivalente ao H13, as principais diferen\u00e7as qu\u00edmicas e quando os dois tipos de a\u00e7o podem ser usados como substitutos em ferramentas para trabalho a quente.","breadcrumb":{"@id":"https:\/\/aobosteel.com\/h13-vs-skd61-tool-steel\/#breadcrumb"},"mainEntity":[{"@id":"https:\/\/aobosteel.com\/h13-vs-skd61-tool-steel\/#faq-question-1773287985283"},{"@id":"https:\/\/aobosteel.com\/h13-vs-skd61-tool-steel\/#faq-question-1773288046296"},{"@id":"https:\/\/aobosteel.com\/h13-vs-skd61-tool-steel\/#faq-question-1773288046899"},{"@id":"https:\/\/aobosteel.com\/h13-vs-skd61-tool-steel\/#faq-question-1773288047844"},{"@id":"https:\/\/aobosteel.com\/h13-vs-skd61-tool-steel\/#faq-question-1773288087348"},{"@id":"https:\/\/aobosteel.com\/h13-vs-skd61-tool-steel\/#faq-question-1773288098442"},{"@id":"https:\/\/aobosteel.com\/h13-vs-skd61-tool-steel\/#faq-question-1773288108228"},{"@id":"https:\/\/aobosteel.com\/h13-vs-skd61-tool-steel\/#faq-question-1773288109213"}],"inLanguage":"pt-BR","potentialAction":[{"@type":"ReadAction","target":["https:\/\/aobosteel.com\/h13-vs-skd61-tool-steel\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/aobosteel.com\/h13-vs-skd61-tool-steel\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"\u9996\u9875","item":"https:\/\/aobosteel.com\/"},{"@type":"ListItem","position":2,"name":"H13 vs SKD61 Tool Steel: Are They the Same? | Aobo Steel"}]},{"@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":"pt-BR"},{"@type":"Organization","@id":"https:\/\/aobosteel.com\/#organization","name":"AoboSteel","url":"https:\/\/aobosteel.com\/","logo":{"@type":"ImageObject","inLanguage":"pt-BR","@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":"pt-BR","@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\/pt\/blog\/author\/admin\/"},{"@type":"Question","@id":"https:\/\/aobosteel.com\/h13-vs-skd61-tool-steel\/#faq-question-1773287985283","position":1,"url":"https:\/\/aobosteel.com\/h13-vs-skd61-tool-steel\/#faq-question-1773287985283","name":"O a\u00e7o ferramenta H13 \u00e9 o mesmo que o SKD61?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"While commonly treated as equivalents in industrial use, they are not identical. They are defined by different standards and have slightly different allowable chemical ranges.","inLanguage":"pt-BR"},"inLanguage":"pt-BR"},{"@type":"Question","@id":"https:\/\/aobosteel.com\/h13-vs-skd61-tool-steel\/#faq-question-1773288046296","position":2,"url":"https:\/\/aobosteel.com\/h13-vs-skd61-tool-steel\/#faq-question-1773288046296","name":"Qual a diferen\u00e7a entre ASTM H13 e JIS SKD61?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"H13 is an American hot-work tool steel defined under ASTM A681 and AISI. SKD61 is defined under JIS G4404, the Japanese Industrial Standard for tool steels.","inLanguage":"pt-BR"},"inLanguage":"pt-BR"},{"@type":"Question","@id":"https:\/\/aobosteel.com\/h13-vs-skd61-tool-steel\/#faq-question-1773288046899","position":3,"url":"https:\/\/aobosteel.com\/h13-vs-skd61-tool-steel\/#faq-question-1773288046899","name":"Posso substituir o SKD61 pelo H13?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"In many applications, they can be substituted without major practical differences. However, engineers must verify that the specific material batch complies with the required chemical limits and standards.","inLanguage":"pt-BR"},"inLanguage":"pt-BR"},{"@type":"Question","@id":"https:\/\/aobosteel.com\/h13-vs-skd61-tool-steel\/#faq-question-1773288047844","position":4,"url":"https:\/\/aobosteel.com\/h13-vs-skd61-tool-steel\/#faq-question-1773288047844","name":"Quais s\u00e3o as diferen\u00e7as qu\u00edmicas entre H13 e SKD61?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"H13 allows higher maximum levels of carbon (0.45% vs 0.42%) and molybdenum (1.75% vs 1.50%). H13 also specifies a slightly higher minimum chromium content of 4.75%.","inLanguage":"pt-BR"},"inLanguage":"pt-BR"},{"@type":"Question","@id":"https:\/\/aobosteel.com\/h13-vs-skd61-tool-steel\/#faq-question-1773288087348","position":5,"url":"https:\/\/aobosteel.com\/h13-vs-skd61-tool-steel\/#faq-question-1773288087348","name":"Para que s\u00e3o utilizados os a\u00e7os ferramenta H13 e SKD61?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Both are used for high-temperature tooling exposed to mechanical stress and thermal cycling. Common applications include die casting, forging, hot extrusion, core pins, and mandrels.","inLanguage":"pt-BR"},"inLanguage":"pt-BR"},{"@type":"Question","@id":"https:\/\/aobosteel.com\/h13-vs-skd61-tool-steel\/#faq-question-1773288098442","position":6,"url":"https:\/\/aobosteel.com\/h13-vs-skd61-tool-steel\/#faq-question-1773288098442","name":"Por que o SKD61 \u00e9 considerado o equivalente japon\u00eas do H13?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"They are considered equivalents because they belong to the same chromium-molybdenum-vanadium alloy family. Their chemical designs and intended service environments have significant overlap.","inLanguage":"pt-BR"},"inLanguage":"pt-BR"},{"@type":"Question","@id":"https:\/\/aobosteel.com\/h13-vs-skd61-tool-steel\/#faq-question-1773288108228","position":7,"url":"https:\/\/aobosteel.com\/h13-vs-skd61-tool-steel\/#faq-question-1773288108228","name":"Os materiais H13 e SKD61 possuem as mesmas propriedades mec\u00e2nicas?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Mechanical properties like hardness and toughness depend more on heat treatment and manufacturing than on the grade designation alone. Both are designed for similar demanding service environments.","inLanguage":"pt-BR"},"inLanguage":"pt-BR"},{"@type":"Question","@id":"https:\/\/aobosteel.com\/h13-vs-skd61-tool-steel\/#faq-question-1773288109213","position":8,"url":"https:\/\/aobosteel.com\/h13-vs-skd61-tool-steel\/#faq-question-1773288109213","name":"O que deve ser verificado antes de substituir esses a\u00e7os para ferramentas?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Substitution should be confirmed against the required specification and the material test report for the supplied batch. This ensures the metal meets the specific needs of the purchase order.","inLanguage":"pt-BR"},"inLanguage":"pt-BR"}]}},"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\/pt\/blog\/author\/admin\/"},"uagb_comment_info":0,"uagb_excerpt":"H13 vs SKD61 Tool Steel H13 and SKD61 are two hot-work tool steel designations defined in different standards but commonly treated as equivalent grades in international tooling applications. Because they are not specified under the same system, engineers and buyers should verify chemical limits and certification before treating them as direct substitutes. For a broader&hellip;","rttpg_featured_image_url":null,"rttpg_author":{"display_name":"Evan","author_link":"https:\/\/aobosteel.com\/pt\/blog\/author\/admin\/"},"rttpg_comment":0,"rttpg_category":null,"rttpg_excerpt":"H13 vs SKD61 Tool Steel H13 and SKD61 are two hot-work tool steel designations defined in different standards but commonly treated as equivalent grades in international tooling applications. Because they are not specified under the same system, engineers and buyers should verify chemical limits and certification before treating them as direct substitutes. For a broader&hellip;","_links":{"self":[{"href":"https:\/\/aobosteel.com\/pt\/wp-json\/wp\/v2\/pages\/13540","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/aobosteel.com\/pt\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/aobosteel.com\/pt\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/aobosteel.com\/pt\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/aobosteel.com\/pt\/wp-json\/wp\/v2\/comments?post=13540"}],"version-history":[{"count":0,"href":"https:\/\/aobosteel.com\/pt\/wp-json\/wp\/v2\/pages\/13540\/revisions"}],"wp:attachment":[{"href":"https:\/\/aobosteel.com\/pt\/wp-json\/wp\/v2\/media?parent=13540"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}