{"id":9390,"date":"2025-08-03T00:20:47","date_gmt":"2025-08-02T16:20:47","guid":{"rendered":"https:\/\/aobosteel.com\/?page_id=9390"},"modified":"2026-01-29T00:25:37","modified_gmt":"2026-01-28T16:25:37","slug":"h21-tool-steel","status":"publish","type":"page","link":"https:\/\/aobosteel.com\/pt\/h21-tool-steel\/","title":{"rendered":"A\u00e7o para ferramentas H21 | 1.2581 | 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 hs-cta-trigger-button hs-cta-trigger-button-230288465624\"><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 para Ferramentas H21 \u00e9 um a\u00e7o para ferramentas de trabalho a quente \u00e0 base de tungst\u00eanio, classificado no grupo AISI H. Esses tipos de a\u00e7os estavam entre as primeiras op\u00e7\u00f5es de alta liga desenvolvidas para aplica\u00e7\u00f5es exigentes de ferramentas de alta temperatura.&nbsp;<a href=\"https:\/\/aobosteel.com\/pt\/\"><mark style=\"background-color:rgba(0, 0, 0, 0);color:#0693e3\" class=\"has-inline-color\">A\u00e7o Aobo<\/mark><\/a>, com nossa vasta experi\u00eancia em forjamento de a\u00e7o para ferramentas, entendemos as nuances dos materiais.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"1-eael-table-of-content\">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 class=\"wp-block-heading\" id=\"2-eael-table-of-content\">2. Propriedades do a\u00e7o para ferramentas H21<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"3-eael-table-of-content\">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 class=\"wp-block-heading\" id=\"4-eael-table-of-content\">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-leadin-hubspot-form-block\">\n\t\t\t\t\t\t<script>\n\t\t\t\t\t\t\twindow.hsFormsOnReady = window.hsFormsOnReady || [];\n\t\t\t\t\t\t\twindow.hsFormsOnReady.push(()=>{\n\t\t\t\t\t\t\t\thbspt.forms.create({\n\t\t\t\t\t\t\t\t\tportalId: 242461771,\n\t\t\t\t\t\t\t\t\tformId: \"1f7a4dcb-eb56-45e5-bd4f-5921cbf714c1\",\n\t\t\t\t\t\t\t\t\ttarget: \"#hbspt-form-1779915213000-5574082208\",\n\t\t\t\t\t\t\t\t\tregion: \"na2\",\n\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t})});\n\t\t\t\t\t\t<\/script>\n\t\t\t\t\t\t<div class=\"hbspt-form\" id=\"hbspt-form-1779915213000-5574082208\"><\/div><\/div>\n<\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"5-eael-table-of-content\">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 class=\"wp-block-heading\" id=\"6-eael-table-of-content\">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 class=\"wp-block-heading\" id=\"7-eael-table-of-content\">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>&nbsp;Nesta fase, a microestrutura do a\u00e7o se transforma em <mark style=\"background-color:rgba(0, 0, 0, 0);color:#0693e3\" class=\"has-inline-color\"><a href=\"https:\/\/aobosteel.com\/pt\/knowledge-hub\/what-is-austenite\/\">austenita<\/a><\/mark>. Isso permite que o carbono e elementos de liga cr\u00edticos, como tungst\u00eanio (W) e cromo (Cr), se dissolvam na estrutura, o que \u00e9 fundamental para atingir a dureza ap\u00f3s o resfriamento.<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"8-eael-table-of-content\">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 class=\"wp-block-heading\" id=\"9-eael-table-of-content\">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 class=\"wp-block-heading\" id=\"10-eael-table-of-content\">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 class=\"wp-block-heading\" id=\"11-eael-table-of-content\">3.5 Controles de Processo Importantes<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"12-eael-table-of-content\">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 class=\"wp-block-heading\" id=\"13-eael-table-of-content\">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 class=\"wp-block-heading\" id=\"14-eael-table-of-content\">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 class=\"wp-block-heading\" id=\"15-eael-table-of-content\">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>:&nbsp;<a href=\"https:\/\/aobosteel.com\/pt\/3cr2w8v-tool-steel\/\">3Cr2W8V<\/a><\/li>\n<\/ul>\n\n\n\n<div class=\"wp-block-group has-ast-global-color-8-background-color has-background is-layout-constrained wp-block-group-is-layout-constrained\">\n<h2 class=\"wp-block-heading has-text-align-center\">Precisa de a\u00e7o para ferramentas H21 de alto desempenho?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Aproveite os mais de 20 anos de experi\u00eancia da Aobo Steel em forjamento para suas aplica\u00e7\u00f5es cr\u00edticas em altas temperaturas. Nosso a\u00e7o ferramenta H21 oferece excepcional tenacidade e resist\u00eancia ao calor, garantindo confiabilidade e longevidade para suas ferramentas e matrizes.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Deixe que nossos especialistas forne\u00e7am consultoria personalizada, a\u00e7o H21 de qualidade superior e or\u00e7amentos competitivos.<\/p>\n\n\n\n<p class=\"has-ast-global-color-0-color has-text-color has-link-color wp-elements-9d4e054cfdf1fbf3c7a6f1e66d0b8bc7 wp-block-paragraph\"><strong>Pronto para otimizar suas opera\u00e7\u00f5es? Entre em contato conosco hoje mesmo! Preencha o formul\u00e1rio abaixo para come\u00e7ar e nossos especialistas entrar\u00e3o em contato em breve.<\/strong><\/p>\n\n\n\n<div class=\"wp-block-leadin-hubspot-form-block\">\n\t\t\t\t\t\t<script>\n\t\t\t\t\t\t\twindow.hsFormsOnReady = window.hsFormsOnReady || [];\n\t\t\t\t\t\t\twindow.hsFormsOnReady.push(()=>{\n\t\t\t\t\t\t\t\thbspt.forms.create({\n\t\t\t\t\t\t\t\t\tportalId: 242461771,\n\t\t\t\t\t\t\t\t\tformId: \"1f7a4dcb-eb56-45e5-bd4f-5921cbf714c1\",\n\t\t\t\t\t\t\t\t\ttarget: \"#hbspt-form-1779915213000-2518048643\",\n\t\t\t\t\t\t\t\t\tregion: \"na2\",\n\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t})});\n\t\t\t\t\t\t<\/script>\n\t\t\t\t\t\t<div class=\"hbspt-form\" id=\"hbspt-form-1779915213000-2518048643\"><\/div><\/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. 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These types of steels were among the earliest high-alloy options developed for demanding high-temperature tooling applications. At&nbsp;Aobo Steel, with our extensive experience in tool steel forging, we understand the nuances of materials. 1. H21 Tool Steel Chemical Composition The performance of [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":9156,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"content-type":"landing-page","_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 v27.6.1 (Yoast SEO v27.6) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>H21 Tool Steel | 1.2581 | SKD7 - 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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