{"id":15065,"date":"2026-05-07T09:02:44","date_gmt":"2026-05-07T01:02:44","guid":{"rendered":"https:\/\/aobosteel.com\/?page_id=15065"},"modified":"2026-06-25T10:20:54","modified_gmt":"2026-06-25T02:20:54","slug":"a2-tool-steel-hardness","status":"publish","type":"page","link":"https:\/\/aobosteel.com\/pt\/a2-tool-steel-hardness\/","title":{"rendered":"Dureza do a\u00e7o ferramenta A2: 57\u201362 HRC, tabela de revenimento e dados de recozimento."},"content":{"rendered":"<section class=\"aobo-a2-hardness-page\">\n  <style>\n    .aobo-a2-hardness-page {\n      --aobo-blue: #0c56d0;\n      --aobo-blue-dark: #073b8e;\n      --aobo-blue-soft: #eaf2ff;\n      --aobo-border: #d7e5fb;\n      --aobo-text: #203044;\n      --aobo-muted: #617087;\n      --aobo-orange: #f59b23;\n      --aobo-white: #ffffff;\n      --aobo-shadow: 0 18px 45px rgba(12, 86, 208, 0.10);\n      font-family:inherit;\n      color: var(--aobo-text);\n      line-height: 1.7;\n      background: transparent;\n      padding: 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No estado recozido, a liga A2 \u00e9 normalmente fornecida com uma dureza de cerca de 200-250 HB para usinagem antes do tratamento t\u00e9rmico. Ap\u00f3s a t\u00eampera, a liga A2 pode atingir cerca de 63,5-65 HRC e, com tratamento subzero ou criog\u00eanico, a dureza ap\u00f3s a t\u00eampera pode aumentar ligeiramente para cerca de 65-66 HRC.<\/p>\n      <p>A dureza final selecionada para o a\u00e7o A2 depende do equil\u00edbrio entre resist\u00eancia ao desgaste e tenacidade. Uma dureza maior melhora a reten\u00e7\u00e3o do fio e a resist\u00eancia \u00e0 abras\u00e3o, enquanto uma dureza menor reduz o risco de lascamento e fissuras sob impacto ou carga lateral.<\/p>\n    <\/header>\n\n    <main class=\"aobo-article\">\n      <section class=\"aobo-supply-block\" aria-label=\"Consulta e detalhes do produto em a\u00e7o ferramenta A2\">\n        <div class=\"aobo-supply-image\">\n          <img decoding=\"async\" src=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/03\/A2-MATERIAL.webp\" alt=\"Barra de a\u00e7o ferramenta A2\" loading=\"lazy\">\n        <\/div>\n        <div class=\"aobo-supply-content\">\n          <h2>Precisa de A2 com uma dureza de trabalho espec\u00edfica?<\/h2>\n          <p>A Aobo Steel fornece a\u00e7o A2 recozido, pronto para tratamento t\u00e9rmico at\u00e9 atingir a dureza HRC desejada. Informe-nos as dimens\u00f5es e a quantidade para receber um or\u00e7amento ou consulte os detalhes completos do produto.<\/p>\n          <div class=\"aobo-supply-actions\">\n            <a class=\"aobo-btn aobo-btn-primary popmake-16052\" href=\"javascript:void(0);\">Enviar consulta<\/a>\n            <a class=\"aobo-btn aobo-btn-secondary\" href=\"https:\/\/aobosteel.com\/pt\/a2-tool-steel\/\">Veja os detalhes do a\u00e7o ferramenta A2.<\/a>\n          <\/div>\n        <\/div>\n      <\/section>\n\n      <h2>Qual \u00e9 a dureza do a\u00e7o ferramenta A2?<\/h2>\n      <p>A dureza do a\u00e7o ferramenta A2 depende de como o a\u00e7o \u00e9 tratado para uso final: recozido, temperado, tratado criogenicamente ou revenido.<\/p>\n      <div class=\"aobo-table-wrap\">\n        <table class=\"aobo-table\">\n          <thead>\n            <tr><th>Condi\u00e7\u00e3o do a\u00e7o ferramenta A2<\/th><th>Dureza t\u00edpica<\/th><th>Significado<\/th><\/tr>\n          <\/thead>\n          <tbody>\n            <tr><td>Condi\u00e7\u00e3o de recozimento<\/td><td>200-250 HB<\/td><td>Macio o suficiente para usinagem<\/td><\/tr>\n            <tr><td>Condi\u00e7\u00e3o de recozimento adequada<\/td><td>Geralmente at\u00e9 cerca de 235 HB<\/td><td>condi\u00e7\u00e3o de usinabilidade controlada<\/td><\/tr>\n            <tr><td>condi\u00e7\u00e3o ap\u00f3s t\u00eampera<\/td><td>63,5-65 HRC<\/td><td>Muito duro, mas quebradi\u00e7o demais para uso normal.<\/td><\/tr>\n            <tr><td>Resfriado rapidamente com tratamento subzero ou criog\u00eanico<\/td><td>65-66 HRC<\/td><td>Maior dureza devido \u00e0 transforma\u00e7\u00e3o da austenita retida.<\/td><\/tr>\n            <tr><td>Condi\u00e7\u00f5es de trabalho temperadas<\/td><td>57-62 HRC<\/td><td>Faixa de dureza pr\u00e1tica normal<\/td><\/tr>\n            <tr><td>Prioridade de resist\u00eancia ao desgaste<\/td><td>60-62 HRC<\/td><td>Utilizado em pun\u00e7\u00f5es, matrizes, calibradores e ferramentas de desgaste.<\/td><\/tr>\n            <tr><td>Prioridade de resist\u00eancia<\/td><td>56-58 HRC<\/td><td>Utilizado em situa\u00e7\u00f5es onde lascas, impactos ou rachaduras s\u00e3o uma preocupa\u00e7\u00e3o.<\/td><\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n      <p>Para compradores e fabricantes de ferramentas, a dureza mais \u00fatil do a\u00e7o A2 \u00e9 a dureza final de trabalho ap\u00f3s o revenimento.<\/p>\n\n      <h2>Dureza do a\u00e7o ferramenta A2 por condi\u00e7\u00e3o<\/h2>\n      <h3>1. Condi\u00e7\u00e3o de recozimento<\/h3>\n      <p>O a\u00e7o ferramenta A2 \u00e9 geralmente fornecido em estado recozido antes da usinagem e do tratamento t\u00e9rmico final. A dureza t\u00edpica do a\u00e7o recozido \u00e9 de cerca de 200-250 HB. Muitas especifica\u00e7\u00f5es controlam a dureza do A2 recozido em torno de 201-229 HB, com limites superiores \u00e0s vezes em torno de 235 HB ou 248 HBW, dependendo da norma e das condi\u00e7\u00f5es de fornecimento.<\/p>\n\n      <h3>2. Condi\u00e7\u00e3o ap\u00f3s t\u00eampera<\/h3>\n      <p>Ap\u00f3s a austenitiza\u00e7\u00e3o e t\u00eampera, o a\u00e7o A2 atinge alta dureza. A dureza exata ap\u00f3s a t\u00eampera depende principalmente da temperatura de t\u00eampera.<\/p>\n      <div class=\"aobo-table-wrap\">\n        <table class=\"aobo-table\">\n          <thead>\n            <tr><th>Temperatura de austenitiza\u00e7\u00e3o<\/th><th>Dureza t\u00edpica ap\u00f3s t\u00eampera<\/th><\/tr>\n          <\/thead>\n          <tbody>\n            <tr><td>1700\u00b0F \/ 925\u00b0C<\/td><td>Aproximadamente 63,5 HRC<\/td><\/tr>\n            <tr><td>1750\u00b0F \/ 955\u00b0C<\/td><td>Aproximadamente 64,5 HRC<\/td><\/tr>\n            <tr><td>1775-1800\u00b0F \/ 970-980\u00b0C<\/td><td>Aproximadamente 64-65 HRC<\/td><\/tr>\n            <tr><td>Tratamento subzero ou criog\u00eanico ap\u00f3s o resfriamento brusco<\/td><td>Aproximadamente 65-66 HRC<\/td><\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n      <p>O resfriamento convencional pode deixar cerca de 16-18% de austenita retida em A2. O tratamento subzero ou criog\u00eanico pode transformar parte dessa austenita retida em martensita, aumentando ligeiramente a dureza.<\/p>\n      <p>No entanto, o a\u00e7o A2 temperado \u00e9 altamente tensionado e quebradi\u00e7o. Ele deve ser revenido antes do uso.<\/p>\n\n      <h3>3. Condi\u00e7\u00f5es de trabalho temperadas<\/h3>\n      <p>Ap\u00f3s o revenimento, o a\u00e7o A2 \u00e9 comumente utilizado com uma dureza de aproximadamente 57-62 HRC. Essa \u00e9 a principal faixa de dureza para ferramentas industriais.<\/p>\n      <p>Para matrizes de estampagem, pun\u00e7\u00f5es, calibradores, ferramentas de conforma\u00e7\u00e3o e ferramentas de trabalho a frio resistentes ao desgaste, uma dureza de 58-62 HRC \u00e9 comum. Se a ferramenta estiver exposta a impactos, cargas laterais ou lascamento de borda, a dureza \u00e9 frequentemente reduzida para 56-58 HRC para melhorar a tenacidade.<\/p>\n\n      <h2>Tabela de t\u00eampera do a\u00e7o ferramenta A2: HRC por temperatura<\/h2>\n      <p>O a\u00e7o A2 deve ser revenido logo ap\u00f3s a t\u00eampera, normalmente quando a pe\u00e7a esfria a cerca de 50-66 \u00b0C (120-150 \u00b0F). O revenido reduz as tens\u00f5es residuais, melhora a tenacidade e define a dureza final. O revenido duplo \u00e9 comumente utilizado quando a estabilidade dimensional \u00e9 importante.<\/p>\n      <div class=\"aobo-table-wrap\">\n        <table class=\"aobo-table\">\n          <thead>\n            <tr><th>Temperatura de condicionamento ou t\u00eampera<\/th><th>Dureza t\u00edpica<\/th><\/tr>\n          <\/thead>\n          <tbody>\n            <tr><td>Ap\u00f3s t\u00eampera<\/td><td>63,5-65 HRC<\/td><\/tr>\n            <tr><td>Resfriado rapidamente com tratamento subzero ou criog\u00eanico<\/td><td>At\u00e9 cerca de 65-66 HRC<\/td><\/tr>\n            <tr><td>345-350\u00b0F \/ 175\u00b0C<\/td><td>Aproximadamente 59,7-63 HRC<\/td><\/tr>\n            <tr><td>400\u00b0F \/ 204\u00b0C<\/td><td>Aproximadamente 59,5-60 HRC<\/td><\/tr>\n            <tr><td>400\u00b0F \/ 204\u00b0C ap\u00f3s tratamento criog\u00eanico<\/td><td>Aproximadamente 61-62 HRC<\/td><\/tr>\n            <tr><td>600\u00b0F \/ 315\u00b0C<\/td><td>Aproximadamente 55,5 HRC<\/td><\/tr>\n            <tr><td>900\u00b0F \/ 480\u00b0C<\/td><td>Cerca de 51 HRC<\/td><\/tr>\n            <tr><td>950-1000\u00b0F \/ 510-540\u00b0C<\/td><td>Aproximadamente 54-57 HRC<\/td><\/tr>\n            <tr><td>1100\u00b0F \/ 595\u00b0C<\/td><td>Aproximadamente 46-47 HRC<\/td><\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n      <p>Normalmente, o alum\u00ednio A2 perde dureza com o aumento da temperatura de revenido. Uma exce\u00e7\u00e3o \u00e9 a faixa de t\u00eampera secund\u00e1ria em torno de 510-540 \u00b0C (950-1000 \u00b0F), onde carbonetos de liga finos podem elevar a dureza novamente para cerca de 54-57 HRC.<\/p>\n      <p>Para a maioria das ferramentas de trabalho a frio que exigem alta resist\u00eancia ao desgaste, temperaturas de revenido mais baixas s\u00e3o usadas para manter o a\u00e7o A2 em 58-62 HRC. Para ferramentas que exigem maior tenacidade ou estabilidade, temperaturas de revenido mais altas podem ser selecionadas, mas a dureza final geralmente ser\u00e1 menor.<\/p>\n\n      <h2>Como o tratamento t\u00e9rmico controla a dureza do a\u00e7o ferramenta A2<\/h2>\n      <p>A dureza A2 \u00e9 controlada principalmente pela temperatura de austenitiza\u00e7\u00e3o, taxa de t\u00eampera, austenita retida, tamanho da se\u00e7\u00e3o transversal e temperatura de revenido.<\/p>\n      <div class=\"aobo-table-wrap\">\n        <table class=\"aobo-table\">\n          <thead>\n            <tr><th>Fator<\/th><th>Efeito na dureza A2<\/th><\/tr>\n          <\/thead>\n          <tbody>\n            <tr><td>Temperatura de austenitiza\u00e7\u00e3o<\/td><td>Controla o potencial de endurecimento<\/td><\/tr>\n            <tr><td>Taxa de resfriamento<\/td><td>Controla a forma\u00e7\u00e3o de martensita<\/td><\/tr>\n            <tr><td>Tamanho da se\u00e7\u00e3o<\/td><td>Afeta a dureza do n\u00facleo<\/td><\/tr>\n            <tr><td>Austenita retida<\/td><td>O excesso de austenita retida reduz a dureza e a estabilidade.<\/td><\/tr>\n            <tr><td>Tratamento subzero ou criog\u00eanico<\/td><td>Pode aumentar ligeiramente a dureza<\/td><\/tr>\n            <tr><td>Temperatura de t\u00eampera<\/td><td>Determina o HRC de trabalho final<\/td><\/tr>\n            <tr><td>t\u00eampera dupla<\/td><td>Melhora a estabilidade ap\u00f3s a transforma\u00e7\u00e3o da austenita retida.<\/td><\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n      <p>Se a temperatura de austenitiza\u00e7\u00e3o for muito baixa, a liga A2 pode n\u00e3o atingir a dureza m\u00e1xima. Se a temperatura for muito alta, o excesso de austenita retida pode reduzir a dureza e a estabilidade dimensional.<\/p>\n      <p>O A2 \u00e9 um a\u00e7o ferramenta de t\u00eampera ao ar. Por conter cromo e molibd\u00eanio em quantidade suficiente para promover uma t\u00eampera profunda, ele atinge alta dureza com menor risco de distor\u00e7\u00e3o do que os a\u00e7os de t\u00eampera em \u00f3leo, como o A2. <a href=\"https:\/\/aobosteel.com\/pt\/o1-tool-steel\/\">O1<\/a>.<\/p>\n      <p>A dimens\u00e3o da se\u00e7\u00e3o ainda importa. O a\u00e7o A2 geralmente endurece eficazmente em se\u00e7\u00f5es transversais s\u00f3lidas de at\u00e9 cerca de 114 mm (4,5 polegadas). Acima de cerca de 127 mm (5 polegadas), o n\u00facleo pode resfriar muito lentamente e n\u00e3o atingir a mesma dureza da superf\u00edcie.<\/p>\n      <div class=\"aobo-note-box\">\n        <p>Para obter informa\u00e7\u00f5es detalhadas sobre temperaturas de austenitiza\u00e7\u00e3o, ciclos de revenido, m\u00e9todos de t\u00eampera e considera\u00e7\u00f5es sobre estabilidade dimensional, consulte nosso documento completo. <a href=\"https:\/\/aobosteel.com\/pt\/a2-tool-steel-heat-treatment-guide\/\">Guia de Tratamento T\u00e9rmico de A\u00e7o para Ferramentas A2<\/a>.<\/p>\n      <\/div>\n\n      <h2>Dureza recomendada do a\u00e7o ferramenta A2 para diferentes aplica\u00e7\u00f5es<\/h2>\n      <p>A dureza A2 correta depende se a ferramenta requer maior resist\u00eancia ao desgaste ou maior tenacidade.<\/p>\n      <div class=\"aobo-table-wrap\">\n        <table class=\"aobo-table\">\n          <thead>\n            <tr><th>Aplicativo<\/th><th>Dureza recomendada<\/th><th>Raz\u00e3o<\/th><\/tr>\n          <\/thead>\n          <tbody>\n            <tr><td>Matrizes e pun\u00e7\u00f5es para estampagem, grandes tiragens<\/td><td>58-62 HRC<\/td><td>Melhor resist\u00eancia ao desgaste e reten\u00e7\u00e3o de fio.<\/td><\/tr>\n            <tr><td>Matrizes e pun\u00e7\u00f5es para estampagem, pequenas tiragens<\/td><td>58-60 HRC<\/td><td>Resist\u00eancia ao desgaste e tenacidade equilibradas<\/td><\/tr>\n            <tr><td>Pun\u00e7\u00f5es para perfura\u00e7\u00e3o e corte<\/td><td>58-60 HRC<\/td><td>Reduz o risco de quebra sob carga lateral.<\/td><\/tr>\n            <tr><td>Matrizes de dobra<\/td><td>58-60 HRC<\/td><td>Resist\u00eancia ao desgaste e tenacidade equilibradas<\/td><\/tr>\n            <tr><td>Desenho morre<\/td><td>58-62 HRC<\/td><td>Resiste a riscos e desgaste por deslizamento.<\/td><\/tr>\n            <tr><td>Forma\u00e7\u00e3o e jun\u00e7\u00e3o de rolos<\/td><td>58-62 HRC<\/td><td>Mant\u00e9m a resist\u00eancia ao desgaste e a precis\u00e3o.<\/td><\/tr>\n            <tr><td>Matrizes de estampagem a frio<\/td><td>56-60 HRC<\/td><td>Maior resist\u00eancia a impactos repetidos<\/td><\/tr>\n            <tr><td>Mandris de fia\u00e7\u00e3o<\/td><td>50-58 HRC<\/td><td>Melhor ductilidade sob alta press\u00e3o.<\/td><\/tr>\n            <tr><td>Matrizes de cunhagem<\/td><td>58-60 HRC<\/td><td>Resiste \u00e0 tens\u00e3o compressiva<\/td><\/tr>\n            <tr><td>Matrizes e pun\u00e7\u00f5es de relevo<\/td><td>58-61 HRC<\/td><td>Mant\u00e9m os detalhes e a resist\u00eancia ao desgaste da superf\u00edcie.<\/td><\/tr>\n            <tr><td>Matrizes e pun\u00e7\u00f5es para extrus\u00e3o a frio<\/td><td>56-62 HRC<\/td><td>Depende da carga e do projeto da ferramenta.<\/td><\/tr>\n            <tr><td>Bases de matrizes, bigornas e hastes de pun\u00e7\u00e3o<\/td><td>56-58 HRC<\/td><td>Melhor absor\u00e7\u00e3o de impacto<\/td><\/tr>\n            <tr><td>l\u00e2minas de corte a frio<\/td><td>58-63 HRC<\/td><td>L\u00e2mina de corte dur\u00e1vel<\/td><\/tr>\n            <tr><td>Penas e pinos de nocaute<\/td><td>59-63 HRC<\/td><td>Resiste ao desgaste e \u00e0 deforma\u00e7\u00e3o da ponta.<\/td><\/tr>\n            <tr><td>Cilindros de laminador a frio<\/td><td>58-62 HRC<\/td><td>resist\u00eancia uniforme ao desgaste<\/td><\/tr>\n            <tr><td>Calibradores, esquadros, r\u00e9guas e gabaritos.<\/td><td>58-62 HRC<\/td><td>Resist\u00eancia ao desgaste e estabilidade dimensional<\/td><\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n      <p>Se uma ferramenta A2 lascar repetidamente sob forte impacto, reduzir a dureza pode ajudar, mas apenas at\u00e9 certo ponto. Em aplica\u00e7\u00f5es de choque intenso, uma classe de dureza mais alta, como... <a href=\"https:\/\/aobosteel.com\/pt\/s7-tool-steel\/\">S7<\/a> Pode ser uma escolha melhor do que amolecer demais o A2.<\/p>\n\n      <h2>Dureza do a\u00e7o ferramenta A2 em compara\u00e7\u00e3o com D2 e O1<\/h2>\n      <p>A2, <a href=\"https:\/\/aobosteel.com\/pt\/d2-tool-steel\/\">D2<\/a>, O a\u00e7o O1 e o a\u00e7o HRC podem atingir valores semelhantes, mas n\u00e3o apresentam o mesmo desempenho no mesmo n\u00edvel de dureza.<\/p>\n      <div class=\"aobo-table-wrap\">\n        <table class=\"aobo-table\">\n          <thead>\n            <tr><th>Grau<\/th><th>Tipo de t\u00eampera<\/th><th>Dureza de trabalho t\u00edpica<\/th><th>Principal for\u00e7a<\/th><th>Limita\u00e7\u00e3o principal<\/th><\/tr>\n          <\/thead>\n          <tbody>\n            <tr><td>O1<\/td><td>Endurecimento por \u00f3leo<\/td><td>58-60 HRC<\/td><td>Boa resist\u00eancia e tratamento t\u00e9rmico simples.<\/td><td>Menor desgaste e maior risco de distor\u00e7\u00e3o<\/td><\/tr>\n            <tr><td>A2<\/td><td>Endurecimento ao ar<\/td><td>58-62 HRC<\/td><td>Equil\u00edbrio entre resist\u00eancia ao desgaste, tenacidade e estabilidade dimensional.<\/td><td>N\u00e3o t\u00e3o resistente ao desgaste quanto o D2.<\/td><\/tr>\n            <tr><td>D2<\/td><td>Endurecimento ao ar<\/td><td>58-62 HRC<\/td><td>Alta resist\u00eancia ao desgaste<\/td><td>Menor resist\u00eancia e maior risco de lascamento<\/td><\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n      <p>O a\u00e7o D2 possui maior teor de carbono e cromo, formando carbonetos mais duros. Isso confere ao D2 melhor resist\u00eancia ao desgaste, por\u00e9m menor tenacidade. O a\u00e7o O1 possui menos carbonetos de liga, resultando em menor resist\u00eancia ao desgaste, mas oferecendo boa tenacidade em aplica\u00e7\u00f5es adequadas.<\/p>\n      <p>O A2 situa-se entre eles. \u00c9 mais resistente que o D2 e dimensionalmente mais est\u00e1vel que o O1. \u00c9 por isso que o A2 \u00e9 frequentemente escolhido quando o D2 \u00e9 muito quebradi\u00e7o e o O1 n\u00e3o \u00e9 suficientemente est\u00e1vel ou resistente ao desgaste.<\/p>\n      <p>Se voc\u00ea estiver comparando resist\u00eancia ao desgaste, tenacidade e estabilidade dimensional em aplica\u00e7\u00f5es reais de ferramentas, tamb\u00e9m pode consultar nossos guias detalhados sobre <a href=\"https:\/\/aobosteel.com\/pt\/d2-vs-a2-tool-steel\/\">A\u00e7o ferramenta A2 vs D2<\/a> e <a href=\"https:\/\/aobosteel.com\/pt\/a2-vs-o1-tool-steel\/\">A\u00e7o ferramenta A2 vs O1<\/a>.<\/p>\n\n      <h2>Problemas comuns quando o a\u00e7o ferramenta A2 n\u00e3o atinge a dureza necess\u00e1ria<\/h2>\n      <p>Quando o a\u00e7o A2 n\u00e3o atinge a dureza esperada, o problema geralmente est\u00e1 relacionado ao controle do tratamento t\u00e9rmico, \u00e0 dimens\u00e3o da se\u00e7\u00e3o transversal ou \u00e0 condi\u00e7\u00e3o da superf\u00edcie.<\/p>\n      <div class=\"aobo-table-wrap\">\n        <table class=\"aobo-table\">\n          <thead>\n            <tr><th>Problema<\/th><th>Causa prov\u00e1vel<\/th><th>Resultado<\/th><\/tr>\n          <\/thead>\n          <tbody>\n            <tr><td>Baixa dureza ap\u00f3s t\u00eampera<\/td><td>Temperatura de austenitiza\u00e7\u00e3o muito baixa<\/td><td>Resposta de endurecimento insuficiente<\/td><\/tr>\n            <tr><td>Baixa dureza ap\u00f3s austenitiza\u00e7\u00e3o em alta temperatura<\/td><td>Austenita retida em excesso<\/td><td>A austenita retida macia reduz a dureza medida.<\/td><\/tr>\n            <tr><td>Superf\u00edcie macia, mas n\u00facleo duro<\/td><td>Descarboneta\u00e7\u00e3o<\/td><td>A perda de carbono na superf\u00edcie impede a dureza total da superf\u00edcie.<\/td><\/tr>\n            <tr><td>N\u00facleo macio em se\u00e7\u00e3o grande<\/td><td>A taxa de resfriamento est\u00e1 muito lenta.<\/td><td>O n\u00facleo pode n\u00e3o se transformar completamente em martensita.<\/td><\/tr>\n            <tr><td>Dureza final muito baixa<\/td><td>Temperatura de t\u00eampera muito alta<\/td><td>A martensita \u00e9 excessivamente amolecida.<\/td><\/tr>\n            <tr><td>Pontos moles localizados ap\u00f3s o lixamento<\/td><td>Queimadura por moagem ou t\u00eampera excessiva<\/td><td>A dureza da superf\u00edcie torna-se irregular.<\/td><\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n      <p>Um erro comum \u00e9 assumir que uma temperatura de austenitiza\u00e7\u00e3o mais alta sempre significa maior dureza. Na liga A2, o superaquecimento pode aumentar a austenita retida e reduzir a dureza final.<\/p>\n      <p>A descarboneta\u00e7\u00e3o superficial \u00e9 outra causa comum. Se o A2 for aquecido sem a devida prote\u00e7\u00e3o, a superf\u00edcie pode perder carbono. O n\u00facleo pode atingir a dureza correta, mas a superf\u00edcie permanece macia.<\/p>\n      <p>Se\u00e7\u00f5es de grande dimens\u00e3o tamb\u00e9m podem causar problemas de dureza. O alum\u00ednio A2 possui boa capacidade de endurecimento em profundidade, mas se\u00e7\u00f5es muito grandes ainda podem resfriar muito lentamente no centro. Acima de aproximadamente 127 mm (5 polegadas), a dureza do n\u00facleo pode ser menor que a dureza da superf\u00edcie sob resfriamento em ar parado.<\/p>\n      <p>A t\u00eampera inadequada tamb\u00e9m pode reduzir a dureza. Se a temperatura de t\u00eampera for muito alta para a dureza desejada, o valor final de HRC ser\u00e1 menor. Se a retifica\u00e7\u00e3o ap\u00f3s o tratamento t\u00e9rmico gerar calor excessivo, pode criar zonas localizadas mais macias ou dureza superficial irregular.<\/p>\n    <\/main>\n\n    <section class=\"aobo-related-pages\" aria-label=\"P\u00e1ginas relacionadas ao a\u00e7o ferramenta A2\">\n      <h2>P\u00e1ginas relacionadas<\/h2>\n      <div class=\"aobo-related-grid\">\n        <a class=\"aobo-related-card\" href=\"https:\/\/aobosteel.com\/pt\/a2-tool-steel-properties\/\">\n          <strong>Propriedades do a\u00e7o para ferramentas A2<\/strong>\n          <span>Informa\u00e7\u00f5es completas sobre a composi\u00e7\u00e3o qu\u00edmica, dureza, resist\u00eancia ao desgaste, tenacidade e classes equivalentes do A2 para sele\u00e7\u00e3o do material.<\/span>\n        <\/a>\n        <a class=\"aobo-related-card\" href=\"https:\/\/aobosteel.com\/pt\/a2-tool-steel-heat-treatment-guide\/\">\n          <strong>Guia de Tratamento T\u00e9rmico de A\u00e7o para Ferramentas A2<\/strong>\n          <span>Pr\u00e9-aquecimento, austenitiza\u00e7\u00e3o, t\u00eampera ao ar e revenido duplo em etapas para atingir uma dureza est\u00e1vel de 58 a 62 HRC.<\/span>\n        <\/a>\n        <a class=\"aobo-related-card\" href=\"https:\/\/aobosteel.com\/pt\/a2-tool-steel-machining-fabrication-guide\/\">\n          <strong>Guia de Usinagem de A\u00e7o Ferramenta A2<\/strong>\n          <span>Velocidades de corte, classifica\u00e7\u00f5es de usinabilidade, pr\u00e1ticas de fura\u00e7\u00e3o, retifica\u00e7\u00e3o, eletroeros\u00e3o e soldagem para A2 recozido e temperado<\/span>\n        <\/a>\n        <a class=\"aobo-related-card\" href=\"https:\/\/aobosteel.com\/pt\/a2-tool-steel-applications\/\">\n          <strong>Aplica\u00e7\u00f5es do a\u00e7o ferramenta A2<\/strong>\n          <span>Onde o A2 se encaixa nas ferramentas de trabalho a frio e como selecion\u00e1-lo pelo modo de falha, em vez de apenas pelas propriedades do material.<\/span>\n        <\/a>\n      <\/div>\n    <\/section>\n\n    <section class=\"aobo-final-cta\">\n      <div>\n        <h2>Precisa de a\u00e7o A2 com a dureza de trabalho adequada?<\/h2>\n        <p>Envie-nos a especifica\u00e7\u00e3o, tamanho, quantidade, dureza desejada, aplica\u00e7\u00e3o e condi\u00e7\u00e3o de falha. A Aobo Steel pode ajudar a encontrar o a\u00e7o ferramenta A2 ou outro que atenda \u00e0s suas necessidades de resist\u00eancia ao desgaste, lascamento, trincas ou estabilidade dimensional.<\/p>\n      <\/div>\n      <a class=\"aobo-btn popmake-16052\" href=\"javascript:void(0);\">Enviar consulta<\/a>\n    <\/section>\n  <\/div>\n<\/section>","protected":false},"excerpt":{"rendered":"<p>A2 Tool Steel Hardness Guide A2 Tool Steel Hardness Chart and Heat Treatment HRC Guide A2 tool steel typically has a hardness of 57-62 HRC after hardening and tempering, which is the standard working hardness range for punches, dies, gauges, forming tools, and other cold-work tooling applications. In the annealed condition, A2 is typically supplied [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":15068,"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":"normal-width-container","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"disabled","ast-breadcrumbs-content":"","ast-featured-img":"disabled","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"class_list":["post-15065","page","type-page","status-publish","has-post-thumbnail","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.1 (Yoast SEO v28.1) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>A2 Tool Steel Hardness: 57\u201362 HRC, Tempering Chart &amp; Annealed Data<\/title>\n<meta name=\"description\" content=\"A2 tool steel reaches 57\u201362 HRC after tempering. Full hardness data by condition: annealed (200\u2013250 HB), as-quenched (63.5\u201365 HRC), and a complete tempering chart with HRC by temperature.\" \/>\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\/a2-tool-steel-hardness\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"A2 Tool Steel Hardness: 57\u201362 HRC, Tempering Chart &amp; Annealed Data\" \/>\n<meta property=\"og:description\" content=\"A2 tool steel reaches 57\u201362 HRC after tempering. 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