{"id":9390,"date":"2025-08-03T00:20:47","date_gmt":"2025-08-02T16:20:47","guid":{"rendered":"https:\/\/aobosteel.com\/?page_id=9390"},"modified":"2026-06-26T09:35:19","modified_gmt":"2026-06-26T01:35:19","slug":"h21-tool-steel","status":"publish","type":"page","link":"https:\/\/aobosteel.com\/pt\/h21-tool-steel\/","title":{"rendered":"A\u00e7o ferramenta H21 | 1.2581 | Fornecedor SKD7"},"content":{"rendered":"<div class=\"wp-block-cover alignfull\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"337\" class=\"wp-block-cover__image-background wp-image-7233 size-large\" alt=\"\" src=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/05\/banner3-1024x337.webp\" data-object-fit=\"cover\" srcset=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/05\/banner3-1024x337.webp 1024w, https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/05\/banner3-300x99.webp 300w, https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/05\/banner3-768x253.webp 768w, https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/05\/banner3-1536x506.webp 1536w, https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/05\/banner3-18x6.webp 18w, https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/05\/banner3.webp 1920w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><span aria-hidden=\"true\" class=\"wp-block-cover__background has-background-dim\" style=\"background-color:#4e4b40\"><\/span><div class=\"wp-block-cover__inner-container is-layout-constrained wp-block-cover-is-layout-constrained\">\n<div class=\"wp-block-uagb-container uagb-block-29fc5c3c alignfull uagb-is-root-container\"><div class=\"uagb-container-inner-blocks-wrap\">\n<div class=\"wp-block-uagb-advanced-heading uagb-block-c196a237\"><h6 class=\"uagb-heading-text\"><a href=\"https:\/\/aobosteel.com\/pt\/\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-1-color\">In\u00edcio<\/mark> <\/a>&gt; <a href=\"https:\/\/aobosteel.com\/pt\/tool-steels\/\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-1-color\">Cat\u00e1logo de A\u00e7os para Ferramentas<\/mark><u> <\/u><\/a>A\u00e7o ferramenta H21<\/h6><\/div>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-d1ce38c5\"><h5 class=\"uagb-heading-text\"><em>Aobo Steel | Fornecedor global de a\u00e7o para ferramentas na China<\/em><\/h5><\/div>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-5b6189ba\"><h2 class=\"uagb-heading-text\">A\u00e7o ferramenta AISI H21 | 1.2581 | A\u00e7o para trabalho a quente com alto teor de tungst\u00eanio SKD5<\/h2><\/div>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-914bcd03\"><h5 class=\"uagb-heading-text\">\u2713100% Testado por Ultrassom para Garantia de Qualidade | Classe D\/d Garantida pela norma SEP 1921-82<\/h5><\/div>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-84cd4af9\"><h5 class=\"uagb-heading-text\">\u2713Otimizado para matrizes de extrus\u00e3o a quente e fundi\u00e7\u00e3o de lat\u00e3o | Resist\u00eancia t\u00e9rmica superior<\/h5><\/div>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-20e20150\"><h5 class=\"uagb-heading-text\">\u2713Entrega no estado recozido<\/h5><\/div>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-33ee52f8\"><h5 class=\"uagb-heading-text\">\u2713Superf\u00edcie: Escama preta, torneada, acabamento bruto ou polida<\/h5><\/div>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button popmake-16052\"><a class=\"wp-block-button__link wp-element-button\">Consulta r\u00e1pida sobre o material H21<\/a><\/div>\n<\/div>\n<\/div><\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-group is-layout-constrained wp-block-group-is-layout-constrained\">\n<p class=\"wp-block-paragraph\">O a\u00e7o ferramenta H21 \u00e9 um a\u00e7o ferramenta para trabalho a quente \u00e0 base de tungst\u00eanio, classificado no grupo H da AISI. Esses tipos de a\u00e7os estiveram entre as primeiras op\u00e7\u00f5es de alta liga desenvolvidas para aplica\u00e7\u00f5es exigentes em ferramentas de alta temperatura. <\/p>\n\n\n\n<h2 id=\"1-eael-table-of-content\" class=\"wp-block-heading\">1. Composi\u00e7\u00e3o qu\u00edmica do a\u00e7o para ferramentas H21<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">O desempenho do a\u00e7o H21 \u00e9 amplamente determinado pelos seus elementos de liga. Uma composi\u00e7\u00e3o t\u00edpica inclui:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Carbono (C):<\/strong>&nbsp;0,26% \u2013 0,36% (Fornece temperabilidade e resist\u00eancia ao desgaste)<\/li>\n\n\n\n<li><strong>Mangan\u00eas (Mn):<\/strong>&nbsp;0,15% \u2013 0,40% (Melhora a temperabilidade, atua como desoxidante\/dessulfurizante)<\/li>\n\n\n\n<li><strong>Sil\u00edcio (Si):<\/strong>&nbsp;0,15% \u2013 0,50% (Aumenta a resist\u00eancia e a dureza, atua como desoxidante)<\/li>\n\n\n\n<li><strong>Cromo (Cr):<\/strong>&nbsp;3.00% \u2013 3.75% (Aumenta a resist\u00eancia \u00e0 oxida\u00e7\u00e3o e corros\u00e3o em alta temperatura)<\/li>\n\n\n\n<li><strong>Van\u00e1dio (V):<\/strong>&nbsp;0,30% \u2013 0,60% (Forma carbonetos duros, aumentando a resist\u00eancia ao desgaste e a resist\u00eancia ao calor)<\/li>\n\n\n\n<li><strong>Tungst\u00eanio (W):<\/strong>&nbsp;8.50% \u2013 10.00% (Elemento chave para dureza a quente, resist\u00eancia a altas temperaturas e resist\u00eancia ao desgaste)<\/li>\n<\/ul>\n\n\n\n<h2 id=\"2-eael-table-of-content\" class=\"wp-block-heading\">2. Propriedades do a\u00e7o para ferramentas H21<\/h2>\n\n\n\n<h3 id=\"3-eael-table-of-content\" class=\"wp-block-heading\">2.1 Dureza e Resist\u00eancia ao Calor<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">O a\u00e7o H21 \u00e9 reconhecido por sua boa resist\u00eancia ao calor e capacidade de manter a dureza em temperaturas elevadas, um fator cr\u00edtico em aplica\u00e7\u00f5es de trabalho a quente.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Dureza temperada:<\/strong>&nbsp;Ap\u00f3s a austenitiza\u00e7\u00e3o e <a href=\"https:\/\/aobosteel.com\/pt\/knowledge-hub\/what-is-tempering\/\">t\u00eampera<\/a> (Por exemplo, 2 horas a 595 \u00b0C \/ 1100 \u00b0F), pode-se atingir uma dureza de aproximadamente 529 HB. Aumentar a temperatura de revenido (por exemplo, para 650 \u00b0C \/ 1200 \u00b0F) reduz a dureza para aproximadamente 437 HB.<\/li>\n\n\n\n<li><strong>Dureza a quente:<\/strong>&nbsp;Em temperaturas de opera\u00e7\u00e3o, a dureza diminui. Por exemplo, a dureza a quente pode ser em torno de 280 HB a 595 \u00b0C (1100 \u00b0F) e 211 HB a 650 \u00b0C (1200 \u00b0F). (Com base em dados t\u00edpicos com dureza inicial \u00e0 temperatura ambiente de 444 HB).<\/li>\n<\/ul>\n\n\n\n<h3 id=\"4-eael-table-of-content\" class=\"wp-block-heading\">2.2 Tenacidade e Ductilidade<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Embora ofere\u00e7a boa resist\u00eancia ao calor, a tenacidade e a resist\u00eancia ao choque do H21 s\u00e3o geralmente menores em compara\u00e7\u00e3o com o a\u00e7o \u00e0 base de cromo.&nbsp;<a href=\"https:\/\/aobosteel.com\/pt\/hot-work-tool-steels\/\">a\u00e7os para trabalho a quente<\/a>, como&nbsp;<a href=\"https:\/\/aobosteel.com\/pt\/h11-tool-steel\/\">H11<\/a>&nbsp;ou&nbsp;<a href=\"https:\/\/aobosteel.com\/pt\/h13-tool-steel\/\">H13<\/a>. Suas caracter\u00edsticas de choque tamb\u00e9m s\u00e3o consideradas inferiores ao H19.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A temperatura de revenimento escolhida e a taxa de resfriamento ap\u00f3s o endurecimento, como por exemplo, \u00f3leo. <a href=\"https:\/\/aobosteel.com\/pt\/knowledge-hub\/what-is-quenching\/\">t\u00eampera <\/a>Em contraste com um resfriamento mais lento, a resist\u00eancia ao impacto (teste Izod ou Charpy com entalhe em V) \u00e9 significativamente influenciada.<\/li>\n\n\n\n<li>As propriedades de tor\u00e7\u00e3o podem variar significativamente dependendo dos par\u00e2metros espec\u00edficos do tratamento t\u00e9rmico usados para atingir a dureza alvo, normalmente dentro da faixa de 42-55 HRC.<\/li>\n<\/ul>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-7387b849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"810\" height=\"810\" src=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/07\/H21-TOOL-STEEL.avif\" alt=\"A\u00c7O PARA FERRAMENTAS H21\" class=\"wp-image-9156\" srcset=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/07\/H21-TOOL-STEEL.avif 810w, https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/07\/H21-TOOL-STEEL-300x300.avif 300w, https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/07\/H21-TOOL-STEEL-150x150.avif 150w, https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/07\/H21-TOOL-STEEL-768x768.avif 768w, https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/07\/H21-TOOL-STEEL-12x12.avif 12w\" sizes=\"auto, (max-width: 810px) 100vw, 810px\" \/><figcaption class=\"wp-element-caption\">A\u00e7o para ferramentas H21<\/figcaption><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"has-ast-global-color-0-color has-text-color has-link-color wp-elements-e31ffddc1b0b39d41f21db8b0c3fd2ef wp-block-paragraph\"><strong>Voc\u00ea est\u00e1 procurando a\u00e7o ferramenta H21? Preencha o formul\u00e1rio abaixo para entrar em contato conosco hoje mesmo.<\/strong><\/p>\n\n\n\n<div class=\"wp-block-contact-form-7-contact-form-selector\">\n<div class=\"wpcf7 no-js\" id=\"wpcf7-f16042-o1\" lang=\"en-US\" dir=\"ltr\" data-wpcf7-id=\"16042\">\n<div class=\"screen-reader-response\"><p role=\"status\" aria-live=\"polite\" aria-atomic=\"true\"><\/p> <ul><\/ul><\/div>\n<form action=\"\/pt\/wp-json\/wp\/v2\/pages\/9390#wpcf7-f16042-o1\" method=\"post\" class=\"wpcf7-form init\" aria-label=\"Formul\u00e1rio de contato\" novalidate=\"novalidate\" data-status=\"init\" data-trp-original-action=\"\/pt\/wp-json\/wp\/v2\/pages\/9390#wpcf7-f16042-o1\">\n<fieldset class=\"hidden-fields-container\"><input type=\"hidden\" name=\"_wpcf7\" value=\"16042\" \/><input type=\"hidden\" name=\"_wpcf7_version\" value=\"6.1.6\" \/><input type=\"hidden\" name=\"_wpcf7_locale\" value=\"en_US\" \/><input type=\"hidden\" name=\"_wpcf7_unit_tag\" value=\"wpcf7-f16042-o1\" \/><input type=\"hidden\" name=\"_wpcf7_container_post\" value=\"0\" \/><input type=\"hidden\" name=\"_wpcf7_posted_data_hash\" value=\"\" \/>\n<\/fieldset>\n<p><span class=\"wpcf7-form-control-wrap\" data-name=\"your-name\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-text wpcf7-validates-as-required\" autocomplete=\"name\" aria-required=\"true\" aria-invalid=\"false\" placeholder=\"Seu nome *\" value=\"\" type=\"text\" name=\"your-name\" \/><\/span>\n<\/p>\n<p><span class=\"wpcf7-form-control-wrap\" data-name=\"your-email\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-email wpcf7-validates-as-required wpcf7-text wpcf7-validates-as-email\" autocomplete=\"email\" aria-required=\"true\" aria-invalid=\"false\" placeholder=\"E-mail *\" value=\"\" type=\"email\" name=\"your-email\" \/><\/span>\n<\/p>\n<p><span class=\"wpcf7-form-control-wrap\" data-name=\"your-message\"><textarea cols=\"40\" rows=\"4\" maxlength=\"2000\" class=\"wpcf7-form-control wpcf7-textarea wpcf7-validates-as-required\" aria-required=\"true\" aria-invalid=\"false\" placeholder=\"Mensagem *\" name=\"your-message\"><\/textarea><\/span>\n<\/p>\n<p><input class=\"wpcf7-form-control wpcf7-submit has-spinner\" type=\"submit\" value=\"Enviar consulta\" \/>\n<\/p><p style=\"display: none !important;\" class=\"akismet-fields-container\" data-prefix=\"_wpcf7_ak_\"><label>\u0394<textarea name=\"_wpcf7_ak_hp_textarea\" cols=\"45\" rows=\"8\" maxlength=\"100\"><\/textarea><\/label><input type=\"hidden\" id=\"ak_js_1\" name=\"_wpcf7_ak_js\" value=\"201\"\/><script>\ndocument.getElementById( \"ak_js_1\" ).setAttribute( \"value\", ( new Date() ).getTime() );\n<\/script>\n<\/p><input type='hidden' class='wpcf7-pum' value='{\"closepopup\":false,\"closedelay\":0,\"openpopup\":true,\"openpopup_id\":16052}' \/><div class=\"wpcf7-response-output\" aria-hidden=\"true\"><\/div>\n<input type=\"hidden\" name=\"trp-form-language\" value=\"pt\"\/><\/form>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n<h2 id=\"5-eael-table-of-content\" class=\"wp-block-heading\">3. Tratamento t\u00e9rmico<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Alcan\u00e7ar o desempenho ideal do a\u00e7o para ferramentas H21 depende fortemente de um processo preciso de tratamento t\u00e9rmico. Este procedimento desenvolve a dureza, a resist\u00eancia ao desgaste e a tenacidade necess\u00e1rias para aplica\u00e7\u00f5es exigentes de trabalho a quente.<\/p>\n\n\n\n<h3 id=\"6-eael-table-of-content\" class=\"wp-block-heading\">3.1 Pr\u00e9-aquecimento<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Antes do processo principal de t\u00eampera, o a\u00e7o para ferramentas H21 deve ser cuidadosamente pr\u00e9-aquecido.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Temperatura:<\/strong>&nbsp;Aquecer uniformemente a 760\u2013815 \u00b0C (1400\u20131500 \u00b0F).<\/li>\n\n\n\n<li><strong>Prop\u00f3sito:<\/strong>&nbsp;Esta etapa crucial minimiza o choque t\u00e9rmico e previne trincas, especialmente em componentes com formas complexas ou espessuras variadas. O aquecimento lento e uniforme garante que a temperatura seja distribu\u00edda uniformemente por todo o a\u00e7o, preparando-o para as altas temperaturas da austenitiza\u00e7\u00e3o.<\/li>\n<\/ul>\n\n\n\n<h3 id=\"7-eael-table-of-content\" class=\"wp-block-heading\">3.2 Austenitiza\u00e7\u00e3o (endurecimento)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ap\u00f3s o pr\u00e9-aquecimento, o a\u00e7o \u00e9 levado \u00e0 temperatura de austenitiza\u00e7\u00e3o.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Temperatura:<\/strong>&nbsp;Aquecer a 1095\u20131205 \u00b0C.<\/li>\n\n\n\n<li><strong>Prop\u00f3sito:<\/strong>\u00a0Nessa etapa, a microestrutura do a\u00e7o se transforma em austenita. Isso permite que o carbono e elementos de liga cr\u00edticos, como o tungst\u00eanio (W) e o cromo (Cr), se dissolvam na estrutura, o que \u00e9 fundamental para alcan\u00e7ar a dureza ap\u00f3s o resfriamento.<\/li>\n<\/ul>\n\n\n\n<h4 id=\"8-eael-table-of-content\" class=\"wp-block-heading\">Imers\u00e3o em temperatura de austenitiza\u00e7\u00e3o<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Manter o a\u00e7o na temperatura de austenitiza\u00e7\u00e3o (imers\u00e3o) \u00e9 essencial.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Dura\u00e7\u00e3o:<\/strong>&nbsp;Normalmente de 2 a 5 horas, dependendo da espessura da se\u00e7\u00e3o transversal (reserve tempo suficiente, por exemplo, 1 hora por polegada de espessura).<\/li>\n\n\n\n<li><strong>Prop\u00f3sito:<\/strong>&nbsp;O alto teor de tungst\u00eanio e cromo do H21 forma carbonetos est\u00e1veis. O tempo de imers\u00e3o suficiente garante que esses carbonetos se dissolvam completamente e se distribuam uniformemente na austenita, resultando em uma estrutura uniforme pronta para t\u00eampera.<\/li>\n<\/ul>\n\n\n\n<h3 id=\"9-eael-table-of-content\" class=\"wp-block-heading\">3.3 T\u00eampera (resfriamento)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">O resfriamento r\u00e1pido transforma a austenita em a\u00e7o duro e martens\u00edtico.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>M\u00e9todos:<\/strong>&nbsp;O a\u00e7o H21 pode ser temperado no ar ou no \u00f3leo.<\/li>\n\n\n\n<li><strong>Considera\u00e7\u00f5es:<\/strong>&nbsp;Devido \u00e0 sua alta temperabilidade, o H21 endurece rapidamente, mesmo com resfriamento a ar mais lento. A t\u00eampera a ar \u00e9 frequentemente preferida, pois reduz significativamente o risco de distor\u00e7\u00e3o e trincas por t\u00eampera em compara\u00e7\u00e3o com a t\u00eampera em \u00f3leo mais severa, especialmente para pe\u00e7as maiores ou complexas. A t\u00eampera em \u00f3leo pode ser utilizada se a dureza m\u00e1xima for o objetivo principal. A taxa de resfriamento deve ser suficientemente r\u00e1pida para evitar a forma\u00e7\u00e3o de estruturas mais macias, como perlita ou bainita.<\/li>\n<\/ul>\n\n\n\n<h3 id=\"10-eael-table-of-content\" class=\"wp-block-heading\">3.4 T\u00eampera<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">O a\u00e7o H21 temperado \u00e9 extremamente duro, mas tamb\u00e9m quebradi\u00e7o. O revenimento \u00e9 necess\u00e1rio para refinar suas propriedades.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Temperatura:<\/strong>&nbsp;Reaque\u00e7a o a\u00e7o a 595\u2013675 \u00b0C.<\/li>\n\n\n\n<li><strong>Prop\u00f3sito:<\/strong>&nbsp;O revenimento reduz a fragilidade e melhora significativamente a tenacidade e a ductilidade, mantendo uma dureza substancial. A temperatura e o tempo espec\u00edficos utilizados determinar\u00e3o o equil\u00edbrio final entre dureza e tenacidade.<\/li>\n\n\n\n<li><strong>Temperamentos m\u00faltiplos:<\/strong>&nbsp;Para a\u00e7os-ferramenta de alta liga, como o H21, a realiza\u00e7\u00e3o de dois ou mais ciclos de revenimento \u00e9 uma pr\u00e1tica comum. Isso garante a estabilidade estrutural, transforma a austenita retida e pode contribuir para o endurecimento secund\u00e1rio, melhorando ainda mais o desempenho em temperaturas elevadas.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\">Tabela de Dureza e Temperatura de Revenimento para A\u00e7o H21<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Temperatura de t\u00eampera<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>Rockwell C<\/strong><\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Como extinto<\/td><td class=\"has-text-align-center\" data-align=\"center\">55<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">600\u00b0F\/315\u00b0C<\/td><td class=\"has-text-align-center\" data-align=\"center\">51<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">700\u00b0F\/370\u00b0C<\/td><td class=\"has-text-align-center\" data-align=\"center\">52<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">800\u00b0F\/425\u00b0C<\/td><td class=\"has-text-align-center\" data-align=\"center\">52<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">900\u00b0F\/480\u00b0C<\/td><td class=\"has-text-align-center\" data-align=\"center\">54<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">1000\u00b0F\/540\u00b0C<\/td><td class=\"has-text-align-center\" data-align=\"center\">54<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">1100\u00b0F\/595\u00b0C<\/td><td class=\"has-text-align-center\" data-align=\"center\">51<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">1200\u00b0F\/650\u00b0C<\/td><td class=\"has-text-align-center\" data-align=\"center\">40<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">1300\u00b0F\/705\u00b0C<\/td><td class=\"has-text-align-center\" data-align=\"center\">32<\/td><\/tr><\/tbody><\/table><figcaption class=\"wp-element-caption\">Condi\u00e7\u00f5es experimentais: 1. TEMPERATURA DE PR\u00c9-AQUECIMENTO 1500\u00b0F\/815\u00b0C 2. TEMPERATURA DE ENDURECIMENTO 2125\u00b0F\/1160\u00b0C 3. T\u00caMPERA EM \u00d3LEO OU SAL 4. QU\u00cdMICA Carbono 0,33% Mangan\u00eas 0,25% Sil\u00edcio 0,45% Cromo 3,30% Van\u00e1dio 0,45% Tungst\u00eanio 9,15%<\/figcaption><\/figure>\n\n\n\n<h3 id=\"11-eael-table-of-content\" class=\"wp-block-heading\">3.5 Controles de Processo Importantes<\/h3>\n\n\n\n<h4 id=\"12-eael-table-of-content\" class=\"wp-block-heading\">3.5.1 Preven\u00e7\u00e3o da descarboneta\u00e7\u00e3o<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">O a\u00e7o H21 \u00e9 propenso \u00e0 descarboneta\u00e7\u00e3o, ou perda de carbono da superf\u00edcie, em altas temperaturas de tratamento t\u00e9rmico, resultando em uma camada superficial macia e fraca.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Solu\u00e7\u00e3o:<\/strong>&nbsp;Medidas de prote\u00e7\u00e3o s\u00e3o essenciais durante a austenitiza\u00e7\u00e3o. Isso inclui o uso de fornos de atmosfera controlada, banhos de sal ou o envolvimento das pe\u00e7as em material protetor, como folha de a\u00e7o inoxid\u00e1vel.<\/li>\n<\/ul>\n\n\n\n<h4 id=\"13-eael-table-of-content\" class=\"wp-block-heading\">3.5.2 Resfriamento ap\u00f3s forjamento<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Devido \u00e0 alta temperabilidade do H21, os forjados devem ser resfriados lentamente (por exemplo, resfriamento em forno ou enterramento em isolamento) imediatamente ap\u00f3s a opera\u00e7\u00e3o de forjamento.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Raz\u00e3o:<\/strong>&nbsp;Evite a normaliza\u00e7\u00e3o (resfriamento a ar a partir de altas temperaturas), pois isso pode causar o endurecimento parcial ou total do a\u00e7o, levando \u00e0 fragilidade e potencial forma\u00e7\u00e3o de trincas antes do processo de t\u00eampera e revenimento pretendido. O resfriamento lento garante uma estrutura mais adequada para o tratamento t\u00e9rmico subsequente.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Esta abordagem estruturada para o tratamento t\u00e9rmico do a\u00e7o para ferramentas H21 garante que o material ofere\u00e7a o alto desempenho necess\u00e1rio para as aplica\u00e7\u00f5es de ferramentas de trabalho a quente pretendidas. O controle preciso de cada par\u00e2metro \u00e9 fundamental para o sucesso.<\/p>\n\n\n\n<h2 id=\"14-eael-table-of-content\" class=\"wp-block-heading\">4. Aplica\u00e7\u00f5es do a\u00e7o para ferramentas H21<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Gra\u00e7as \u00e0 sua dureza a quente e resist\u00eancia ao desgaste, o a\u00e7o H21 \u00e9 usado em v\u00e1rios processos de trabalho a quente:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Matrizes e insertos de forjamento<\/li>\n\n\n\n<li>Pun\u00e7\u00f5es, perfuradores e mandris para trabalho a quente<\/li>\n\n\n\n<li>Ferramentas de extrus\u00e3o a quente<\/li>\n\n\n\n<li>L\u00e2minas de cisalhamento a quente (especialmente para aplica\u00e7\u00f5es severas, \u00e0s vezes junto com H25)<\/li>\n\n\n\n<li>Matrizes de fundi\u00e7\u00e3o sob press\u00e3o (especialmente para lat\u00e3o)<\/li>\n\n\n\n<li>Matrizes de cunhagem (especialmente onde alguma resist\u00eancia ao desgaste pode ser trocada por melhor resist\u00eancia \u00e0 quebra em se\u00e7\u00f5es finas)<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">O H21 \u00e9 frequentemente considerado uma escolha adequada para ferramentas destinadas a produ\u00e7\u00f5es m\u00e9dias.<\/p>\n\n\n\n<h2 id=\"15-eael-table-of-content\" class=\"wp-block-heading\">5. Graus equivalentes de a\u00e7o para ferramentas H21<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Europeu (EN)<\/strong>: X30WCrV9-3 (1.2581)<\/li>\n\n\n\n<li><strong>Alemanha (DIN)<\/strong>: 1.2581<\/li>\n\n\n\n<li><strong>Jap\u00e3o (JIS)<\/strong>: SKD5<\/li>\n\n\n\n<li><strong>Fran\u00e7a (AFNOR)<\/strong>: 32CDV12-28<\/li>\n\n\n\n<li><strong>China (GB)<\/strong>: 3Cr2W8V<\/li>\n<\/ul>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button has-custom-width wp-block-button__width-100 popmake-16052\"><a class=\"wp-block-button__link wp-element-button\">Abrir formul\u00e1rio de solicita\u00e7\u00e3o de cota\u00e7\u00e3o<\/a><\/div>\n<\/div>\n<\/div>\n\n\n\n<script type=\"application\/ld+json\">{\n    \"@context\": \"https:\\\/\\\/schema.org\\\/\",\n    \"@type\": \"Product\",\n    \"name\": \"Forged H21 \\\/ 1.2581 \\\/ SKD5 Tungsten Hot Work Tool Steel Round Bar\",\n    \"image\": \"https:\\\/\\\/aobosteel.com\\\/wp-content\\\/uploads\\\/2025\\\/07\\\/H21-TOOL-STEEL.avif\",\n    \"description\": \"Premium Forged H21 (1.2581 \\\/ SKD5) Tungsten Hot Work Tool Steel directly from Aobo Steel factory. Exceptional red hardness and high-temperature wear resistance. Ideal for hot extrusion dies. 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These types of steels were among the earliest high-alloy options developed for demanding high-temperature tooling applications. 1. H21 Tool Steel Chemical Composition The performance of H21 steel is largely determined by its alloying elements. A typical composition includes: 2. H21 Tool [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":9156,"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":"disabled","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"class_list":["post-9390","page","type-page","status-publish","has-post-thumbnail","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.0 (Yoast SEO v28.0) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>H21 Tool Steel | 1.2581 | SKD7 Supplier - AoboSteel<\/title>\n<meta name=\"description\" content=\"Explore H21 tool steel, a tungsten-based hot-work tool steel ideal for high-temperature applications. 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