{"id":14770,"date":"2026-04-22T10:10:05","date_gmt":"2026-04-22T02:10:05","guid":{"rendered":"https:\/\/aobosteel.com\/?page_id=14770"},"modified":"2026-06-25T10:09:31","modified_gmt":"2026-06-25T02:09:31","slug":"440c-stainless-steel-properties","status":"publish","type":"page","link":"https:\/\/aobosteel.com\/pt\/440c-stainless-steel-properties\/","title":{"rendered":"Propriedades, composi\u00e7\u00e3o, dureza, propriedades mec\u00e2nicas e usos do a\u00e7o inoxid\u00e1vel 440C"},"content":{"rendered":"<section class=\"aobo-440c-properties-page\">\n  <style>\n    .aobo-440c-properties-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      --aobo-page-width: 1180px;\n      font-family: inherit;\n      color: 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<\/style>\n\n  <div class=\"aobo-wrap\">\n    <header class=\"aobo-hero\">\n      <span class=\"aobo-eyebrow\">Propriedades do a\u00e7o inoxid\u00e1vel 440C<\/span>\n      <h1>Propriedades do a\u00e7o inoxid\u00e1vel 440C<\/h1>\n      <p>O a\u00e7o 440C \u00e9 um a\u00e7o inoxid\u00e1vel martens\u00edtico de alto carbono e alto cromo, projetado para oferecer m\u00e1xima dureza e resist\u00eancia ao desgaste entre os a\u00e7os resistentes \u00e0 corros\u00e3o. Ap\u00f3s tratamento t\u00e9rmico adequado, atinge at\u00e9 60 HRC e \u00e9 tipicamente utilizado entre 57 e 60 HRC, proporcionando alta resist\u00eancia \u00e0 abras\u00e3o, ao desgaste de borda e \u00e0 deforma\u00e7\u00e3o superficial sob carga de contato.<\/p>\n      <p>Seu alto teor de carbono tamb\u00e9m significa baixa ductilidade e resist\u00eancia ao impacto limitada. Isso faz do 440C um material para pe\u00e7as sujeitas a desgaste sob carga est\u00e1vel, n\u00e3o para aplica\u00e7\u00f5es estruturais ou sujeitas a impactos. Tudo nesta p\u00e1gina decorre dessa \u00fanica compensa\u00e7\u00e3o, portanto, \u00e9 \u00fatil interpretar as propriedades como um equil\u00edbrio, em vez de uma lista de pontos fortes.<\/p>\n    <\/header>\n\n    <main class=\"aobo-article\">\n      <section class=\"aobo-supply-block\" aria-label=\"Informa\u00e7\u00f5es sobre o a\u00e7o inoxid\u00e1vel 440C e detalhes do produto\">\n        <div class=\"aobo-supply-image\">\n          <img decoding=\"async\" src=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/04\/440C.avif\" alt=\"A\u00e7o inoxid\u00e1vel 440C fornecido pela Aobo Steel.\" loading=\"lazy\">\n        <\/div>\n        <div class=\"aobo-supply-content\">\n          <h2>Precisa de a\u00e7o 440C em barra ou chapa recozida?<\/h2>\n          <p>A Aobo Steel mant\u00e9m em estoque a\u00e7o inoxid\u00e1vel 440C com especifica\u00e7\u00f5es industriais, pronto para usinagem e tratamento t\u00e9rmico. Envie suas medidas para um or\u00e7amento ou consulte nossa linha de produtos padr\u00e3o.<\/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\/440c-stainless-steel\/\">Veja os detalhes de fornecimento do modelo 440C.<\/a>\n          <\/div>\n        <\/div>\n      <\/section>\n\n      <h2>Composi\u00e7\u00e3o qu\u00edmica do a\u00e7o inoxid\u00e1vel 440C<\/h2>\n      <p>A composi\u00e7\u00e3o do a\u00e7o 440C (UNS S44004) \u00e9 definida para equilibrar a temperabilidade, a forma\u00e7\u00e3o de carbonetos e a resist\u00eancia \u00e0 corros\u00e3o.<\/p>\n      <p>Composi\u00e7\u00e3o t\u00edpica (wt%):<\/p>\n      <div class=\"aobo-table-wrap\">\n        <table class=\"aobo-table\">\n          <thead>\n            <tr><th>Elemento<\/th><th>Conte\u00fado (%)<\/th><\/tr>\n          <\/thead>\n          <tbody>\n            <tr><td>Carbono (C)<\/td><td>0,95 a 1,20<\/td><\/tr>\n            <tr><td>Cromo (Cr)<\/td><td>16:00 \u00e0s 18:00<\/td><\/tr>\n            <tr><td>Molibd\u00eanio (Mo)<\/td><td>0,75 m\u00e1ximo<\/td><\/tr>\n            <tr><td>Mangan\u00eas (Mn)<\/td><td>1,00 m\u00e1ximo<\/td><\/tr>\n            <tr><td>Sil\u00edcio (Si)<\/td><td>1,00 m\u00e1ximo<\/td><\/tr>\n            <tr><td>F\u00f3sforo (P)<\/td><td>0,040 m\u00e1ximo<\/td><\/tr>\n            <tr><td>Enxofre (S)<\/td><td>0,030 m\u00e1ximo<\/td><\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n      <p>Os altos n\u00edveis de carbono e cromo produzem uma matriz martens\u00edtica que cont\u00e9m um grande volume de carbonetos ricos em cromo. Essa estrutura \u00e9 a fonte da dureza, resist\u00eancia ao desgaste e resist\u00eancia \u00e0 compress\u00e3o, e tamb\u00e9m \u00e9 a raz\u00e3o pela qual a tenacidade \u00e9 baixa. Interpretar as demais propriedades atrav\u00e9s da estrutura do carboneto \u00e9 a maneira mais r\u00e1pida de entender o a\u00e7o 440C.<\/p>\n\n      <h2>440A vs 440B vs 440C: Como o Carbono Altera a Classifica\u00e7\u00e3o<\/h2>\n      <p>A fam\u00edlia 440 compartilha uma base de cromo e se diferencia principalmente pelo teor de carbono. O carbono controla a dureza m\u00e1xima que a liga pode atingir e o quanto de tenacidade ela sacrifica.<\/p>\n      <div class=\"aobo-table-wrap\">\n        <table class=\"aobo-table\">\n          <thead>\n            <tr><th>Grau<\/th><th>Carbono (%)<\/th><th>Dureza M\u00e1xima<\/th><th>Resist\u00eancia ao desgaste<\/th><th>Resist\u00eancia Relativa<\/th><\/tr>\n          <\/thead>\n          <tbody>\n            <tr><td>440A<\/td><td>0,60 a 0,75<\/td><td>56 HRC<\/td><td>M\u00e9dio<\/td><td>Mais alto<\/td><\/tr>\n            <tr><td>440B<\/td><td>0,75 a 0,95<\/td><td>58 HRC<\/td><td>M\u00e9dio a alto<\/td><td>M\u00e9dio<\/td><\/tr>\n            <tr><td>440 \u00b0C<\/td><td>0,95 a 1,20<\/td><td>60 HRC<\/td><td>Alto<\/td><td>Inferior<\/td><\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n      <p>Mais carbono forma carbonetos ricos em cromo, que aumentam a dureza e a resist\u00eancia ao desgaste, mas reduzem a ductilidade e a resist\u00eancia ao impacto. O a\u00e7o 440A \u00e9 a escolha ideal quando a resist\u00eancia \u00e0 corros\u00e3o e a tenacidade s\u00e3o mais importantes do que a vida \u00fatil da aresta de corte. O a\u00e7o 440C \u00e9 a escolha ideal quando a dureza e a resist\u00eancia ao desgaste s\u00e3o prioridades e a pe\u00e7a pode ser projetada com uma tenacidade limitada. O a\u00e7o 440B situa-se entre os dois.<\/p>\n\n      <h2>A\u00e7o inoxid\u00e1vel 440C equivalente<\/h2>\n      <div class=\"aobo-table-wrap\">\n        <table class=\"aobo-table\">\n          <thead>\n            <tr><th>Sistema padr\u00e3o<\/th><th>Designa\u00e7\u00e3o<\/th><\/tr>\n          <\/thead>\n          <tbody>\n            <tr><td>AISI \/ SAE<\/td><td>440\u00b0C \/ 51440\u00b0C<\/td><\/tr>\n            <tr><td>ONU<\/td><td>S44004<\/td><\/tr>\n            <tr><td>EN \/ DIN<\/td><td>1.4125<\/td><\/tr>\n            <tr><td>Nome em ingl\u00eas<\/td><td>X105CrMo17<\/td><\/tr>\n            <tr><td>ASTM<\/td><td>A276 (Barras e Formas)<\/td><\/tr>\n            <tr><td>Metalurgia do P\u00f3<\/td><td>MIM 440C<\/td><\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n      <p>A liga EN 1.4125 (X105CrMo17) \u00e9 o equivalente europeu mais pr\u00f3ximo da AISI 440C, com uma faixa de carbono de aproximadamente 0,95 a 1,20% e uma faixa de cromo de 16 a 18%.<\/p>\n\n      <h2>Propriedades mec\u00e2nicas do a\u00e7o inoxid\u00e1vel 440C<\/h2>\n      <p>O comportamento mec\u00e2nico do a\u00e7o 440C varia drasticamente entre as condi\u00e7\u00f5es recozida e temperada. Na pr\u00e1tica, ele \u00e9 fornecido recozido para usinagem e, em seguida, submetido a tratamento t\u00e9rmico para atingir seu desempenho final.<\/p>\n      <div class=\"aobo-table-wrap\">\n        <table class=\"aobo-table\">\n          <thead>\n            <tr><th>Propriedade<\/th><th>Condi\u00e7\u00e3o recozida<\/th><th>Condi\u00e7\u00e3o endurecida e revenida<\/th><\/tr>\n          <\/thead>\n          <tbody>\n            <tr><td>Dureza<\/td><td>Aproximadamente 230 HB (m\u00e1ximo de 270 HB)<\/td><td>57 a 60 HRC<\/td><\/tr>\n            <tr><td>Resist\u00eancia \u00e0 trac\u00e7\u00e3o<\/td><td>Aproximadamente 758 MPa<\/td><td>Por volta de 1970 MPa<\/td><\/tr>\n            <tr><td>Resist\u00eancia ao escoamento<\/td><td>Aproximadamente 430 a 450 MPa<\/td><td>Aproximadamente de 1896 a 1900 MPa<\/td><\/tr>\n            <tr><td>Alongamento<\/td><td>13 a 14%<\/td><td>Sobre 2%<\/td><\/tr>\n            <tr><td>Redu\u00e7\u00e3o de \u00c1rea<\/td><td>Sobre 25%<\/td><td>Sobre 10%<\/td><\/tr>\n            <tr><td>Resist\u00eancia (Entalhe Charpy em V)<\/td><td>Normalmente n\u00e3o \u00e9 relatado<\/td><td>3 a 5 p\u00e9s-libra<\/td><\/tr>\n            <tr><td>Usinabilidade<\/td><td>Sobre o 40% (em compara\u00e7\u00e3o com o AISI 1212)<\/td><td>Muito ruim<\/td><\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n      <p>O m\u00f3dulo de elasticidade \u00e9 de cerca de 200 GPa, semelhante ao da maioria dos a\u00e7os e n\u00e3o um fator de sele\u00e7\u00e3o. Ap\u00f3s o tratamento t\u00e9rmico, o a\u00e7o adquire alta resist\u00eancia e dureza, enquanto a ductilidade e a resist\u00eancia ao impacto diminuem. O alongamento 2% e os baixos valores de Charpy s\u00e3o os n\u00fameros a serem considerados: o a\u00e7o 440C suporta bem a carga, mas n\u00e3o a redistribui, portanto, a falha sob sobrecarga ou impacto \u00e9 repentina em vez de gradual.<\/p>\n\n      <h2>Vis\u00e3o geral do tratamento t\u00e9rmico do a\u00e7o inoxid\u00e1vel 440C<\/h2>\n      <p>O desempenho do a\u00e7o 440C depende muito do tratamento t\u00e9rmico. Sua dureza, resist\u00eancia ao desgaste e estabilidade dimensional s\u00e3o alcan\u00e7adas por meio de t\u00eampera e revenido controlados.<\/p>\n      <div class=\"aobo-table-wrap\">\n        <table class=\"aobo-table\">\n          <thead>\n            <tr><th>Processo<\/th><th>Faixa de temperatura<\/th><th>Objetivo principal<\/th><\/tr>\n          <\/thead>\n          <tbody>\n            <tr><td>Recozimento<\/td><td>845 a 900\u00b0C<\/td><td>Amolecer a estrutura para usinagem<\/td><\/tr>\n            <tr><td>Pr\u00e9-aquecimento<\/td><td>Aproximadamente 790\u00b0C (v\u00e1rias etapas para pe\u00e7as grandes)<\/td><td>Reduzir o estresse t\u00e9rmico e a distor\u00e7\u00e3o.<\/td><\/tr>\n            <tr><td>Austenitiza\u00e7\u00e3o<\/td><td>1010 a 1065\u00b0C (at\u00e9 1095\u00b0C)<\/td><td>Dissolver carbonetos e possibilitar o endurecimento<\/td><\/tr>\n            <tr><td>Resfriamento<\/td><td>Ar ou \u00f3leo<\/td><td>Formam martensita e atingem a dureza.<\/td><\/tr>\n            <tr><td>Tratamento Subzero<\/td><td>Aproximadamente -75\u00b0C ou menos<\/td><td>Reduzir a austenita retida<\/td><\/tr>\n            <tr><td>T\u00eampera<\/td><td>Aproximadamente 150 a 370\u00b0C (tipicamente 315\u00b0C)<\/td><td>Ajuste a rigidez e alivie o estresse.<\/td><\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n      <p>A temperatura de revenido \u00e9 a principal vari\u00e1vel de controle para o resultado final. Para uma an\u00e1lise completa dos valores ap\u00f3s t\u00eampera e revenido, e por que os n\u00fameros relatados variam, consulte o [inserir refer\u00eancia aqui]. <a href=\"https:\/\/aobosteel.com\/pt\/440c-stainless-steel-hardened-hardness\/\">P\u00e1gina de dureza endurecida 440C<\/a>.<\/p>\n\n      <h2>Como as propriedades do 440C se traduzem em desempenho<\/h2>\n      <p>As propriedades principais s\u00f3 importam dentro de um contexto. Em servi\u00e7o real, o comportamento do a\u00e7o 440C \u00e9 determinado pelo equil\u00edbrio entre dureza, resist\u00eancia ao desgaste, resist\u00eancia \u00e0 corros\u00e3o e tenacidade. Nenhuma dessas propriedades pode ser analisada isoladamente, pois a mesma estrutura de carboneto que aumenta uma delas geralmente diminui outra.<\/p>\n\n      <h3>Resist\u00eancia ao desgaste<\/h3>\n      <p>O a\u00e7o 440C oferece alta resist\u00eancia ao desgaste gra\u00e7as a uma matriz martens\u00edtica dura combinada com um alto volume de carbonetos ricos em cromo. Com dureza de 57-60 HRC, ele resiste tanto ao desgaste adesivo quanto ao abrasivo. A matriz dura limita a deforma\u00e7\u00e3o da superf\u00edcie, a ades\u00e3o, o desgaste por atrito e o engripamento, enquanto os carbonetos resistem ao corte e ao sulcamento durante o contato por deslizamento ou rolamento. \u00c9 por isso que o 440C mant\u00e9m uma superf\u00edcie e um fio est\u00e1veis por mais tempo do que a maioria dos a\u00e7os inoxid\u00e1veis.<\/p>\n      <p>Os mesmos carbonetos definem o limite. Quando s\u00e3o grosseiros ou distribu\u00eddos de forma irregular, criam pontos de tens\u00e3o local que podem iniciar microfissuras sob contato c\u00edclico ou de rolamento. Nessa situa\u00e7\u00e3o, o modo de falha muda de desgaste constante para fadiga superficial. O tratamento t\u00e9rmico subzero melhora a estabilidade dimensional reduzindo a austenita retida, mas n\u00e3o altera esse mecanismo. O a\u00e7o 440C \u00e9 confi\u00e1vel sob carga est\u00e1vel, mas torna-se menos previs\u00edvel quando a fadiga de contato \u00e9 o fator determinante.<\/p>\n\n      <h3>Resist\u00eancia \u00e0 corros\u00e3o<\/h3>\n      <p>O a\u00e7o 440C oferece resist\u00eancia moderada \u00e0 corros\u00e3o e \u00e9 adequado para servi\u00e7os leves, como exposi\u00e7\u00e3o atmosf\u00e9rica, sistemas lubrificados e condi\u00e7\u00f5es industriais leves. A limita\u00e7\u00e3o, mais uma vez, reside nos carbonetos. Parte do cromo fica retido nos carbonetos e n\u00e3o consegue sustentar a camada passiva de \u00f3xido, resultando em uma pel\u00edcula protetora mais fr\u00e1gil do que em a\u00e7os austen\u00edticos.<\/p>\n      <p>O tratamento t\u00e9rmico altera ainda mais esse processo. Altas temperaturas de austenitiza\u00e7\u00e3o dissolvem mais liga e melhoram a resist\u00eancia \u00e0 corros\u00e3o, enquanto o revenimento pode reduzi-la, alterando a composi\u00e7\u00e3o local. O ajuste para melhor desempenho mec\u00e2nico pode, portanto, comprometer a estabilidade \u00e0 corros\u00e3o. O a\u00e7o 440C n\u00e3o deve ser usado em ambientes ricos em cloretos, meios qu\u00edmicos agressivos ou corros\u00e3o em altas temperaturas.<\/p>\n\n      <h3>Tenacidade e comportamento mec\u00e2nico<\/h3>\n      <p>No estado endurecido, o a\u00e7o 440C \u00e9 resistente, mas apresenta baix\u00edssima ductilidade, com um alongamento de aproximadamente 2%. Sob carga, ele n\u00e3o consegue redistribuir a tens\u00e3o, de modo que, quando um ponto local ultrapassa seu limite, a pe\u00e7a falha quase sem aviso pr\u00e9vio. Os modos de falha t\u00edpicos s\u00e3o lascamento das bordas, inicia\u00e7\u00e3o de trincas em concentradores de tens\u00e3o e fratura fr\u00e1gil repentina sob impacto ou flex\u00e3o. Esses modos s\u00e3o impulsionados pela baixa ductilidade e pelos carbonetos que atuam como iniciadores de trincas.<\/p>\n      <p>A conclus\u00e3o pr\u00e1tica \u00e9 consistente em todas as tr\u00eas propriedades. O a\u00e7o 440C apresenta bom desempenho quando a carga \u00e9 est\u00e1vel e bem distribu\u00edda, mas torna-se pouco confi\u00e1vel quando impacto, choque ou concentra\u00e7\u00e3o de tens\u00e3o determinam o resultado.<\/p>\n\n      <h2>440C versus outros a\u00e7os inoxid\u00e1veis e a\u00e7os para ferramentas<\/h2>\n      <p>Escolher o a\u00e7o 440C fica mais f\u00e1cil quando voc\u00ea percebe como ele equilibra dureza, resist\u00eancia ao desgaste, resist\u00eancia \u00e0 corros\u00e3o e tenacidade em compara\u00e7\u00e3o com os a\u00e7os com os quais geralmente compete.<\/p>\n      <div class=\"aobo-table-wrap\">\n        <table class=\"aobo-table\">\n          <thead>\n            <tr><th>Propriedade<\/th><th>440 \u00b0C<\/th><th>420<\/th><th>440A \/ 440B<\/th><th>D2<\/th><th>316<\/th><\/tr>\n          <\/thead>\n          <tbody>\n            <tr><td>Tipo de a\u00e7o<\/td><td>A\u00e7o inoxid\u00e1vel martens\u00edtico<\/td><td>A\u00e7o inoxid\u00e1vel martens\u00edtico<\/td><td>A\u00e7o inoxid\u00e1vel martens\u00edtico<\/td><td>A\u00e7o para ferramentas<\/td><td>A\u00e7o inoxid\u00e1vel austen\u00edtico<\/td><\/tr>\n            <tr><td>Dureza M\u00e1xima<\/td><td>Cerca de 60 HRC<\/td><td>46 a 54 HRC<\/td><td>56 a 58 HRC<\/td><td>60 a 62 HRC<\/td><td>N\u00e3o endurec\u00edvel<\/td><\/tr>\n            <tr><td>Resist\u00eancia ao desgaste<\/td><td>Alto<\/td><td>M\u00e9dio<\/td><td>M\u00e9dio<\/td><td>Muito alto<\/td><td>Baixo<\/td><\/tr>\n            <tr><td>Resist\u00eancia \u00e0 corros\u00e3o<\/td><td>M\u00e9dio<\/td><td>M\u00e9dio<\/td><td>M\u00e9dio a alto<\/td><td>Baixo<\/td><td>Excelente<\/td><\/tr>\n            <tr><td>Robustez<\/td><td>Baixo<\/td><td>M\u00e9dio<\/td><td>M\u00e9dio<\/td><td>Muito baixo<\/td><td>Alto<\/td><\/tr>\n            <tr><td>Usinabilidade<\/td><td>Pobre<\/td><td>Moderado<\/td><td>Moderado<\/td><td>Pobre<\/td><td>Bom<\/td><\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n      <p>O a\u00e7o 440C oferece um equil\u00edbrio entre resist\u00eancia ao desgaste e resist\u00eancia \u00e0 corros\u00e3o. Em compara\u00e7\u00e3o com os a\u00e7os 420 ou 440A, apresenta maior dureza e vida \u00fatil mais longa. Em compara\u00e7\u00e3o com o D2, sacrifica um pouco da resist\u00eancia ao desgaste em prol do desempenho em rela\u00e7\u00e3o \u00e0 corros\u00e3o. Em compara\u00e7\u00e3o com o 316, oferece resist\u00eancia e dureza muito superiores, por\u00e9m com resist\u00eancia \u00e0 corros\u00e3o significativamente menor.<\/p>\n\n      <h2>Quando usar o a\u00e7o inoxid\u00e1vel 440C<\/h2>\n      <p>O a\u00e7o 440C \u00e9 mais adequado para aplica\u00e7\u00f5es que exigem alta dureza e resist\u00eancia ao desgaste, resist\u00eancia moderada \u00e0 corros\u00e3o e carga est\u00e1vel.<\/p>\n      <p>\u00c9 comum em ferramentas de corte de precis\u00e3o, como facas, instrumentos cir\u00fargicos e l\u00e2minas finas, onde a reten\u00e7\u00e3o do fio \u00e9 crucial. Apresenta bom desempenho em pe\u00e7as de contato rolante, como esferas e pistas de rolamento, especialmente onde a resist\u00eancia \u00e0 corros\u00e3o supera a dos a\u00e7os para rolamentos padr\u00e3o. Em sistemas de fluidos, \u00e9 utilizado em sedes de v\u00e1lvulas, v\u00e1lvulas de agulha e pe\u00e7as de bombas que operam em \u00e1gua doce ou fluidos industriais leves. Tamb\u00e9m serve como inserto para moldes pl\u00e1sticos de pol\u00edmeros abrasivos ou levemente corrosivos, onde a dureza superficial e a estabilidade dimensional s\u00e3o importantes. Para uma descri\u00e7\u00e3o completa por tipo de componente, consulte a p\u00e1gina de aplica\u00e7\u00f5es do a\u00e7o 440C.<\/p>\n\n      <h2>Quando N\u00c3O usar a\u00e7o inoxid\u00e1vel 440C<\/h2>\n      <p>O a\u00e7o 440C n\u00e3o \u00e9 a escolha certa quando os principais requisitos s\u00e3o resist\u00eancia, alta resist\u00eancia \u00e0 corros\u00e3o ou facilidade de fabrica\u00e7\u00e3o.<\/p>\n      <p>Seu desempenho sob impacto ou flex\u00e3o \u00e9 ruim devido \u00e0 sua baixa tenacidade, tornando-o inadequado para pe\u00e7as estruturais ou sujeitas a cargas din\u00e2micas. Sua resist\u00eancia \u00e0 corros\u00e3o \u00e9 limitada em ambientes ricos em cloreto ou marinhos, onde a\u00e7os austen\u00edticos como o 316 s\u00e3o mais confi\u00e1veis. O alto teor de carbono e o comportamento de endurecimento ao ar tornam a soldagem pouco confi\u00e1vel. Perde dureza em temperaturas elevadas e n\u00e3o \u00e9 adequado para servi\u00e7os em altas temperaturas. A usinagem \u00e9 dif\u00edcil mesmo quando recozido, e o desgaste da ferramenta \u00e9 alto, portanto, a\u00e7os de usinagem livre s\u00e3o frequentemente mais pr\u00e1ticos para pe\u00e7as complexas ou de alto volume.<\/p>\n\n      <h2>440C Aplica\u00e7\u00f5es Baseadas em Propriedades<\/h2>\n      <p>A gama de aplica\u00e7\u00f5es decorre diretamente da combina\u00e7\u00e3o de alta dureza, resist\u00eancia ao desgaste e resist\u00eancia moderada \u00e0 corros\u00e3o. O a\u00e7o 440C \u00e9 utilizado principalmente em pe\u00e7as sujeitas a fric\u00e7\u00e3o, contato por rolamento ou carregamento superficial repetido, incluindo rolamentos resistentes \u00e0 corros\u00e3o, componentes de v\u00e1lvulas, instrumentos de precis\u00e3o, ferramentas de corte e l\u00e2minas industriais. Onde s\u00e3o necess\u00e1rias tanto resist\u00eancia ao desgaste quanto prote\u00e7\u00e3o b\u00e1sica contra corros\u00e3o, ele aparece em instrumentos m\u00e9dicos, equipamentos para processamento de alimentos e componentes selecionados das ind\u00fastrias aeroespacial e petrol\u00edfera. Processos de metalurgia do p\u00f3, como a moldagem por inje\u00e7\u00e3o de metal, s\u00e3o utilizados para produzir pe\u00e7as pequenas e complexas onde a usinagem \u00e9 ineficiente, incluindo componentes automotivos de precis\u00e3o, mecanismos de travamento e conjuntos miniatura resistentes ao desgaste.<\/p>\n      <p>Devido \u00e0 sua baixa tenacidade e limitada estabilidade t\u00e9rmica, o a\u00e7o 440C geralmente \u00e9 evitado em aplica\u00e7\u00f5es sujeitas a impactos, estruturais e de alta temperatura.<\/p>\n\n      <section class=\"aobo-related-pages\" aria-label=\"P\u00e1ginas relacionadas ao a\u00e7o inoxid\u00e1vel 440C\">\n        <h2>P\u00e1ginas relacionadas<\/h2>\n        <div class=\"aobo-related-grid\">\n          <a class=\"aobo-related-card\" href=\"https:\/\/aobosteel.com\/pt\/440c-stainless-steel-applications\/\">\n            <strong>Aplica\u00e7\u00f5es 440C<\/strong>\n            <span>Usos comuns do a\u00e7o inoxid\u00e1vel 440C com base em seus limites de dureza, resist\u00eancia ao desgaste, resist\u00eancia \u00e0 corros\u00e3o e tenacidade.<\/span>\n          <\/a>\n          <a class=\"aobo-related-card\" href=\"https:\/\/aobosteel.com\/pt\/440c-stainless-steel-heat-treatment\/\">\n            <strong>Guia de tratamento t\u00e9rmico a 440\u00b0C<\/strong>\n            <span>Orienta\u00e7\u00f5es sobre recozimento, t\u00eampera, resfriamento r\u00e1pido, tratamento t\u00e9rmico abaixo de zero e revenimento para o a\u00e7o inoxid\u00e1vel 440C.<\/span>\n          <\/a>\n        <\/div>\n      <\/section>\n\n      <section class=\"aobo-final-cta\">\n        <div>\n          <h2>Precisa de a\u00e7o inoxid\u00e1vel 440C para pe\u00e7as resistentes ao desgaste?<\/h2>\n          <p>Envie sua especifica\u00e7\u00e3o, tamanho, quantidade, condi\u00e7\u00e3o da superf\u00edcie e aplica\u00e7\u00e3o. A Aobo Steel pode fornecer barras e chapas de a\u00e7o inoxid\u00e1vel 440C recozido para usinagem, tratamento t\u00e9rmico, rolamentos, v\u00e1lvulas, ferramentas de corte e pe\u00e7as de desgaste de precis\u00e3o.<\/p>\n        <\/div>\n        <a class=\"aobo-btn popmake-16052\" href=\"javascript:void(0);\">Enviar consulta<\/a>\n      <\/section>\n    <\/main>\n  <\/div>\n<\/section>\n\n\n\n\n<h2 id=\"h-faq\" class=\"wp-block-heading\">Perguntas frequentes<\/h2>\n\n\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1777472822389\"><strong class=\"schema-faq-question\"><strong>Quais s\u00e3o as principais propriedades do a\u00e7o inoxid\u00e1vel 440C?<\/strong><\/strong> <p class=\"schema-faq-answer\">O a\u00e7o 440C caracteriza-se por alta dureza (58\u201360 HRC), alta resist\u00eancia ao desgaste, resist\u00eancia moderada \u00e0 corros\u00e3o e baixa tenacidade. \u00c9 utilizado principalmente em aplica\u00e7\u00f5es sujeitas a desgaste, e n\u00e3o em componentes estruturais.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1777472842441\"><strong class=\"schema-faq-question\"><strong>O a\u00e7o inoxid\u00e1vel 440C \u00e9 duro ou quebradi\u00e7o?<\/strong><\/strong> <p class=\"schema-faq-answer\">Ap\u00f3s tratamento t\u00e9rmico, o a\u00e7o 440C torna-se muito duro, mas tamb\u00e9m relativamente quebradi\u00e7o. Sua baixa resist\u00eancia ao impacto o torna inadequado para aplica\u00e7\u00f5es que envolvem choques, impactos ou cargas de flex\u00e3o.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1777472843195\"><strong class=\"schema-faq-question\"><strong>O a\u00e7o inoxid\u00e1vel 440C possui boa resist\u00eancia \u00e0 corros\u00e3o?<\/strong><\/strong> <p class=\"schema-faq-answer\">O a\u00e7o 440C oferece resist\u00eancia confi\u00e1vel \u00e0 corros\u00e3o em ambientes amenos, como \u00e1gua doce e exposi\u00e7\u00e3o atmosf\u00e9rica. No entanto, \u00e9 menos resistente do que os a\u00e7os inoxid\u00e1veis austen\u00edticos, como o 304 ou o 316, especialmente em ambientes ricos em cloreto ou marinhos.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1777472843896\"><strong class=\"schema-faq-question\"><strong>Por que o a\u00e7o 440C \u00e9 usado em rolamentos?<\/strong><\/strong> <p class=\"schema-faq-answer\">O a\u00e7o 440C \u00e9 amplamente utilizado em rolamentos devido \u00e0 sua combina\u00e7\u00e3o de alta dureza, forte resist\u00eancia ao desgaste e resist\u00eancia suficiente \u00e0 corros\u00e3o. Isso o torna adequado para componentes de contato rolante que operam em ambientes levemente corrosivos.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1777472845089\"><strong class=\"schema-faq-question\"><strong>Qual a dureza que o a\u00e7o 440C pode atingir ap\u00f3s o tratamento t\u00e9rmico?<\/strong><\/strong> <p class=\"schema-faq-answer\">O a\u00e7o 440C pode atingir uma dureza m\u00e1xima de cerca de 60 HRC ap\u00f3s t\u00eampera. Em aplica\u00e7\u00f5es pr\u00e1ticas, geralmente \u00e9 revenido para cerca de 57\u201358 HRC para equilibrar dureza e estabilidade.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1777472871765\"><strong class=\"schema-faq-question\"><strong>O a\u00e7o inoxid\u00e1vel 440C \u00e9 melhor que o a\u00e7o inoxid\u00e1vel 420?<\/strong><\/strong> <p class=\"schema-faq-answer\">O a\u00e7o 440C oferece dureza e resist\u00eancia ao desgaste significativamente maiores do que o 420, mas possui menor tenacidade e \u00e9 mais dif\u00edcil de usinar. O a\u00e7o 420 \u00e9 preferido quando se exige resist\u00eancia ao impacto e facilidade de processamento.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1777472881635\"><strong class=\"schema-faq-question\"><strong>O a\u00e7o inoxid\u00e1vel 440C pode ser soldado?<\/strong><\/strong> <p class=\"schema-faq-answer\">O a\u00e7o 440C geralmente n\u00e3o \u00e9 recomendado para soldagem devido ao seu alto teor de carbono e tend\u00eancia a fissurar. A usinagem e a conforma\u00e7\u00e3o devem ser realizadas no estado recozido antes do tratamento t\u00e9rmico.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1777472897148\"><strong class=\"schema-faq-question\"><strong>O a\u00e7o 440C \u00e9 adequado para usinagem?<\/strong><\/strong> <p class=\"schema-faq-answer\">O a\u00e7o 440C pode ser usinado no estado recozido, mas apresenta usinabilidade relativamente baixa em compara\u00e7\u00e3o com os a\u00e7os carbono padr\u00e3o. Ap\u00f3s o endurecimento, a usinagem torna-se extremamente dif\u00edcil devido \u00e0 alta dureza e ao teor de carbonetos.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1777472905374\"><strong class=\"schema-faq-question\"><strong>Quais s\u00e3o as principais limita\u00e7\u00f5es do a\u00e7o inoxid\u00e1vel 440C?<\/strong><\/strong> <p class=\"schema-faq-answer\">As principais limita\u00e7\u00f5es incluem baixa tenacidade, soldabilidade deficiente, resist\u00eancia limitada \u00e0 corros\u00e3o em ambientes agressivos e desempenho insatisfat\u00f3rio em altas temperaturas.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1777472913920\"><strong class=\"schema-faq-question\"><strong>Quando N\u00c3O se deve usar a\u00e7o inoxid\u00e1vel 440C?<\/strong><\/strong> <p class=\"schema-faq-answer\">O a\u00e7o 440C deve ser evitado em aplica\u00e7\u00f5es que envolvam cargas de impacto, corros\u00e3o severa (como em \u00e1gua do mar), requisitos de soldagem, exposi\u00e7\u00e3o a altas temperaturas ou usinagem complexa em grande volume.<\/p> <\/div> <\/div>","protected":false},"excerpt":{"rendered":"<p>440C Stainless Steel Properties 440C Stainless Steel Properties 440C is a high-carbon, high-chromium martensitic stainless steel built for maximum hardness and wear resistance among corrosion-resistant steels. After proper heat treatment, it reaches up to 60 HRC and is typically used at 57 to 60 HRC, giving strong resistance to abrasion, edge wear, and surface deformation [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":15008,"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-14770","page","type-page","status-publish","has-post-thumbnail","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.2 (Yoast SEO v28.2) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>440C Stainless Steel Properties, Composition, Hardness, Mechanical Properties &amp; 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It is primarily used in wear-dominated applications rather than structural components.\",\"inLanguage\":\"pt-BR\"},\"inLanguage\":\"pt-BR\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/440c-stainless-steel-properties\\\/#faq-question-1777472842441\",\"position\":2,\"url\":\"https:\\\/\\\/aobosteel.com\\\/440c-stainless-steel-properties\\\/#faq-question-1777472842441\",\"name\":\"Is 440C stainless steel hard or brittle?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"After heat treatment, 440C becomes very hard but also relatively brittle. Its low impact toughness makes it unsuitable for applications involving shock, impact, or bending loads.\",\"inLanguage\":\"pt-BR\"},\"inLanguage\":\"pt-BR\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/440c-stainless-steel-properties\\\/#faq-question-1777472843195\",\"position\":3,\"url\":\"https:\\\/\\\/aobosteel.com\\\/440c-stainless-steel-properties\\\/#faq-question-1777472843195\",\"name\":\"Does 440C stainless steel have good corrosion resistance?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"440C provides reliable corrosion resistance in mild environments such as fresh water and atmospheric exposure. However, it is less resistant than austenitic stainless steels such as 304 or 316, especially in chloride-rich or marine environments.\",\"inLanguage\":\"pt-BR\"},\"inLanguage\":\"pt-BR\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/440c-stainless-steel-properties\\\/#faq-question-1777472843896\",\"position\":4,\"url\":\"https:\\\/\\\/aobosteel.com\\\/440c-stainless-steel-properties\\\/#faq-question-1777472843896\",\"name\":\"Why is 440C used for bearings?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"440C is widely used for bearings because it combines high hardness, strong wear resistance, and sufficient corrosion resistance. This makes it suitable for rolling-contact components operating in mildly corrosive environments.\",\"inLanguage\":\"pt-BR\"},\"inLanguage\":\"pt-BR\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/440c-stainless-steel-properties\\\/#faq-question-1777472845089\",\"position\":5,\"url\":\"https:\\\/\\\/aobosteel.com\\\/440c-stainless-steel-properties\\\/#faq-question-1777472845089\",\"name\":\"What hardness can 440C reach after heat treatment?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"440C can reach a maximum hardness of about 60 HRC after quenching. In practical applications, it is usually tempered to around 57\u201358 HRC to balance hardness and stability.\",\"inLanguage\":\"pt-BR\"},\"inLanguage\":\"pt-BR\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/440c-stainless-steel-properties\\\/#faq-question-1777472871765\",\"position\":6,\"url\":\"https:\\\/\\\/aobosteel.com\\\/440c-stainless-steel-properties\\\/#faq-question-1777472871765\",\"name\":\"Is 440C better than 420 stainless steel?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"440C offers significantly higher hardness and wear resistance than 420, but has lower toughness and is more difficult to machine. 420 is preferred when impact resistance and easier processing are required.\",\"inLanguage\":\"pt-BR\"},\"inLanguage\":\"pt-BR\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/440c-stainless-steel-properties\\\/#faq-question-1777472881635\",\"position\":7,\"url\":\"https:\\\/\\\/aobosteel.com\\\/440c-stainless-steel-properties\\\/#faq-question-1777472881635\",\"name\":\"Can 440C stainless steel be welded?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"440C is generally not recommended for welding due to its high carbon content and tendency to crack. 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It is primarily used in wear-dominated applications rather than structural components.","inLanguage":"pt-BR"},"inLanguage":"pt-BR"},{"@type":"Question","@id":"https:\/\/aobosteel.com\/440c-stainless-steel-properties\/#faq-question-1777472842441","position":2,"url":"https:\/\/aobosteel.com\/440c-stainless-steel-properties\/#faq-question-1777472842441","name":"O a\u00e7o inoxid\u00e1vel 440C \u00e9 duro ou quebradi\u00e7o?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"After heat treatment, 440C becomes very hard but also relatively brittle. Its low impact toughness makes it unsuitable for applications involving shock, impact, or bending loads.","inLanguage":"pt-BR"},"inLanguage":"pt-BR"},{"@type":"Question","@id":"https:\/\/aobosteel.com\/440c-stainless-steel-properties\/#faq-question-1777472843195","position":3,"url":"https:\/\/aobosteel.com\/440c-stainless-steel-properties\/#faq-question-1777472843195","name":"O a\u00e7o inoxid\u00e1vel 440C possui boa resist\u00eancia \u00e0 corros\u00e3o?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"440C provides reliable corrosion resistance in mild environments such as fresh water and atmospheric exposure. However, it is less resistant than austenitic stainless steels such as 304 or 316, especially in chloride-rich or marine environments.","inLanguage":"pt-BR"},"inLanguage":"pt-BR"},{"@type":"Question","@id":"https:\/\/aobosteel.com\/440c-stainless-steel-properties\/#faq-question-1777472843896","position":4,"url":"https:\/\/aobosteel.com\/440c-stainless-steel-properties\/#faq-question-1777472843896","name":"Por que o a\u00e7o 440C \u00e9 usado em rolamentos?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"440C is widely used for bearings because it combines high hardness, strong wear resistance, and sufficient corrosion resistance. This makes it suitable for rolling-contact components operating in mildly corrosive environments.","inLanguage":"pt-BR"},"inLanguage":"pt-BR"},{"@type":"Question","@id":"https:\/\/aobosteel.com\/440c-stainless-steel-properties\/#faq-question-1777472845089","position":5,"url":"https:\/\/aobosteel.com\/440c-stainless-steel-properties\/#faq-question-1777472845089","name":"Qual a dureza que o a\u00e7o 440C pode atingir ap\u00f3s o tratamento t\u00e9rmico?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"440C can reach a maximum hardness of about 60 HRC after quenching. In practical applications, it is usually tempered to around 57\u201358 HRC to balance hardness and stability.","inLanguage":"pt-BR"},"inLanguage":"pt-BR"},{"@type":"Question","@id":"https:\/\/aobosteel.com\/440c-stainless-steel-properties\/#faq-question-1777472871765","position":6,"url":"https:\/\/aobosteel.com\/440c-stainless-steel-properties\/#faq-question-1777472871765","name":"O a\u00e7o inoxid\u00e1vel 440C \u00e9 melhor que o a\u00e7o inoxid\u00e1vel 420?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"440C offers significantly higher hardness and wear resistance than 420, but has lower toughness and is more difficult to machine. 420 is preferred when impact resistance and easier processing are required.","inLanguage":"pt-BR"},"inLanguage":"pt-BR"},{"@type":"Question","@id":"https:\/\/aobosteel.com\/440c-stainless-steel-properties\/#faq-question-1777472881635","position":7,"url":"https:\/\/aobosteel.com\/440c-stainless-steel-properties\/#faq-question-1777472881635","name":"O a\u00e7o inoxid\u00e1vel 440C pode ser soldado?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"440C is generally not recommended for welding due to its high carbon content and tendency to crack. 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After hardening, machining becomes extremely difficult due to high hardness and carbide content.","inLanguage":"pt-BR"},"inLanguage":"pt-BR"},{"@type":"Question","@id":"https:\/\/aobosteel.com\/440c-stainless-steel-properties\/#faq-question-1777472905374","position":9,"url":"https:\/\/aobosteel.com\/440c-stainless-steel-properties\/#faq-question-1777472905374","name":"Quais s\u00e3o as principais limita\u00e7\u00f5es do a\u00e7o inoxid\u00e1vel 440C?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"The main limitations include low toughness, poor weldability, limited corrosion resistance in harsh environments, and poor high-temperature performance.","inLanguage":"pt-BR"},"inLanguage":"pt-BR"},{"@type":"Question","@id":"https:\/\/aobosteel.com\/440c-stainless-steel-properties\/#faq-question-1777472913920","position":10,"url":"https:\/\/aobosteel.com\/440c-stainless-steel-properties\/#faq-question-1777472913920","name":"Quando N\u00c3O se deve usar a\u00e7o inoxid\u00e1vel 440C?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"440C should be avoided in applications involving impact loading, severe corrosion (such as seawater), welding requirements, high-temperature exposure, or complex high-volume machining.","inLanguage":"pt-BR"},"inLanguage":"pt-BR"}]}},"uagb_featured_image_src":{"full":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/440C-properties-AD.avif",1254,1254,false],"thumbnail":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/440C-properties-AD-150x150.avif",150,150,true],"medium":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/440C-properties-AD-300x300.avif",300,300,true],"medium_large":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/440C-properties-AD-768x768.avif",768,768,true],"large":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/440C-properties-AD-1024x1024.avif",1024,1024,true],"1536x1536":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/440C-properties-AD.avif",1254,1254,false],"2048x2048":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/440C-properties-AD.avif",1254,1254,false],"trp-custom-language-flag":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/440C-properties-AD-12x12.avif",12,12,true]},"uagb_author_info":{"display_name":"Evan","author_link":"https:\/\/aobosteel.com\/pt\/blog\/author\/admin\/"},"uagb_comment_info":0,"uagb_excerpt":"440C Stainless Steel Properties 440C Stainless Steel Properties 440C is a high-carbon, high-chromium martensitic stainless steel built for maximum hardness and wear resistance among corrosion-resistant steels. 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