{"id":15993,"date":"2026-06-22T14:43:05","date_gmt":"2026-06-22T06:43:05","guid":{"rendered":"https:\/\/aobosteel.com\/?p=15993"},"modified":"2026-09-15T11:36:22","modified_gmt":"2026-09-15T03:36:22","slug":"1045-vs-tool-steel","status":"publish","type":"post","link":"https:\/\/aobosteel.com\/pt\/blog\/1045-vs-tool-steel\/","title":{"rendered":"A\u00e7o 1045 vs. A\u00e7o Ferramenta: Quando cada um \u00e9 utilizado"},"content":{"rendered":"<h1 class=\"wp-block-heading has-text-align-center\" id=\"h-1045-vs-tool-steel\">A\u00e7o 1045 vs. A\u00e7o Ferramenta<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">O a\u00e7o 1045 (AISI\/SAE 1045, tamb\u00e9m designado C45 segundo as normas EN\/DIN e S45C segundo a norma JIS) \u00e9 um a\u00e7o de m\u00e9dio carbono utilizado em pe\u00e7as de m\u00e1quinas, eixos e componentes que necessitam de resist\u00eancia moderada. N\u00e3o \u00e9 um a\u00e7o ferramenta e n\u00e3o deve ser utilizado como substituto.<\/p>\n\n\n\n<h2 id=\"h-what-is-1045-steel\" class=\"wp-block-heading\">O que \u00e9 o a\u00e7o 1045?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">O a\u00e7o 1045 \u00e9 um a\u00e7o de m\u00e9dio carbono com aproximadamente 0,45% de carbono e m\u00ednima adi\u00e7\u00e3o de elementos de liga. A mesma classe aparece como AISI\/SAE 1045 nos EUA, C45 (1.0503) sob a norma EN\/DIN na Europa, S45C sob a norma JIS no Jap\u00e3o e a\u00e7o 45 sob a norma GB chinesa.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Seu teor de carbono \u00e9 de aproximadamente 0,43-0,50%, sendo o mangan\u00eas o principal elemento de liga. Essa composi\u00e7\u00e3o confere-lhe resist\u00eancia moderada, tenacidade razo\u00e1vel, boa usinabilidade no estado recozido ou normalizado e baixo custo. Pode ser endurecido superficialmente por indu\u00e7\u00e3o ou por chama, mas n\u00e3o responde ao tratamento t\u00e9rmico como um a\u00e7o ferramenta ligado.<\/p>\n\n\n\n<h2 id=\"h-chemical-composition-1045-vs-d2-tool-steel\" class=\"wp-block-heading\">Composi\u00e7\u00e3o qu\u00edmica: A\u00e7o ferramenta 1045 vs D2<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>Elemento<\/td><td>1045<\/td><td>A\u00e7o para ferramentas D2<\/td><\/tr><tr><td>Carbono \u00a9<\/td><td>0.43\u20130.50%<\/td><td>1,40\u20131,60%<\/td><\/tr><tr><td>Mangan\u00eas (Mn)<\/td><td>0.60\u20130.90%<\/td><td>0.20\u20130.60%<\/td><\/tr><tr><td>Cromo (Cr)<\/td><td>Rastrear<\/td><td>11.0\u201313.0%<\/td><\/tr><tr><td>Molibd\u00eanio (Mo)<\/td><td>Rastrear<\/td><td>0,70\u20131,20%<\/td><\/tr><tr><td>Van\u00e1dio (V)<\/td><td>Rastrear<\/td><td>0,50\u20131,10%<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">A liga 1045 cont\u00e9m apenas carbono e mangan\u00eas, sem adi\u00e7\u00e3o intencional de cromo, molibd\u00eanio ou van\u00e1dio. A aus\u00eancia desses elementos de liga \u00e9 exatamente o que confere a ela essas propriedades. <a href=\"https:\/\/aobosteel.com\/pt\/o-que-e-aco-para-ferramentas\/\">a\u00e7o para ferramentas<\/a> Sua resist\u00eancia ao desgaste, temperabilidade e desempenho como ferramenta.<\/p>\n\n\n\n<h2 id=\"h-hardness-capability\" class=\"wp-block-heading\">Capacidade de dureza<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">O a\u00e7o 1045 pode ser endurecido, mas n\u00e3o chega nem perto do n\u00edvel de dureza dos a\u00e7os para ferramentas:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>Material<\/td><td>Dureza pr\u00e1tica m\u00e1xima<\/td><td>Limite de se\u00e7\u00e3o de endurecimento total<\/td><\/tr><tr><td>1045<\/td><td>~55 HRC (se\u00e7\u00e3o fina, t\u00eampera em \u00e1gua)<\/td><td>~12mm<\/td><\/tr><tr><td><a href=\"https:\/\/aobosteel.com\/pt\/o1-tool-steel\/\">A\u00e7o para ferramentas O1<\/a><\/td><td>~62 HRC<\/td><td>~50mm (\u00f3leo)<\/td><\/tr><tr><td><a href=\"https:\/\/aobosteel.com\/pt\/d2-tool-steel\/\">A\u00e7o para ferramentas D2<\/a><\/td><td>~62 HRC<\/td><td>~150mm+ (ar)<\/td><\/tr><tr><td><a href=\"https:\/\/aobosteel.com\/pt\/h13-tool-steel\/\">A\u00e7o para ferramentas H13<\/a><\/td><td>~54 HRC<\/td><td>~150mm+ (ar)<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">A principal limita\u00e7\u00e3o \u00e9 a profundidade. O a\u00e7o 1045 atinge alta dureza apenas em se\u00e7\u00f5es muito finas quando temperado em \u00e1gua, resultando em distor\u00e7\u00e3o significativa e maior risco de trincas. Na pr\u00e1tica, as se\u00e7\u00f5es da matriz e da ferramenta atingem, no m\u00e1ximo, cerca de 25-50 HRC, e mesmo assim, a dureza permanece superficial enquanto o n\u00facleo continua macio.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A\u00e7os para ferramentas como D2, A2, O1 e H13 apresentam alta temperabilidade devido ao seu teor de liga, atingindo assim a dureza m\u00e1xima em se\u00e7\u00f5es muito mais espessas com t\u00eampera ao ar ou em \u00f3leo, que resulta em menor distor\u00e7\u00e3o.<\/p>\n\n\n\n<h2 id=\"h-when-1045-is-the-right-choice\" class=\"wp-block-heading\">Quando 1045 \u00e9 a escolha certa<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">1045 is a sound, economical choice for parts that need moderate strength rather than tool-level hardness. It works well for machine shafts, axles, and spindles under moderate load; for bolts, studs, and pins; for light- to medium-duty gears; and for general structural components. It also suits parts that only need a hard-running surface, where induction hardening on the contact area is sufficient. Wherever cost matters more than wear resistance and tool performance is not required, 1045 does the job. The structural grade A36 is often considered for the same work, and the comparison against tool steel is in the <a href=\"https:\/\/aobosteel.com\/pt\/a36-vs-tool-steel\/\">A36 vs a\u00e7o para ferramentas<\/a> p\u00e1gina.<\/p>\n\n\n\n<h2 id=\"h-when-tool-steel-is-required-instead-of-1045\" class=\"wp-block-heading\">Quando \u00e9 necess\u00e1rio usar a\u00e7o ferramenta em vez de a\u00e7o 1045<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">O a\u00e7o 1045 apresenta defici\u00eancias sempre que uma aplica\u00e7\u00e3o depende de uma superf\u00edcie de trabalho dura e resistente ao desgaste em toda a sua espessura. Ele n\u00e3o mant\u00e9m o fio de corte; desgasta-se e deforma-se como matriz ou pun\u00e7\u00e3o; n\u00e3o possui a resist\u00eancia \u00e0 compress\u00e3o necess\u00e1ria para ferramentas de conforma\u00e7\u00e3o; e n\u00e3o oferece reten\u00e7\u00e3o de fio para l\u00e2minas de corte. Al\u00e9m disso, n\u00e3o possui dureza a quente, o que faz com que amole\u00e7a durante o trabalho a quente. De modo geral, qualquer ferramenta que necessite de 58 HRC ou mais em toda a sua espessura est\u00e1 al\u00e9m do que o a\u00e7o 1045 pode oferecer.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>Aplicativo<\/td><td>1045<\/td><td>A\u00e7o ferramenta correto<\/td><\/tr><tr><td>Matriz de corte<\/td><td>Falha rapidamente<\/td><td>D2 ou A2<\/td><\/tr><tr><td>Matriz de forma\u00e7\u00e3o<\/td><td>Desgasta e deforma<\/td><td>A2 ou O1<\/td><\/tr><tr><td>Soco<\/td><td>Deforma e lasca<\/td><td>D2 ou A2<\/td><\/tr><tr><td>L\u00e2mina de cisalhamento<\/td><td>Sem reten\u00e7\u00e3o de borda<\/td><td>D2<\/td><\/tr><tr><td>matriz de fundi\u00e7\u00e3o<\/td><td>Amolece e falha<\/td><td>H13<\/td><\/tr><tr><td>Eixo da m\u00e1quina<\/td><td>Aceit\u00e1vel<\/td><td>Nenhuma necess\u00e1ria<\/td><\/tr><tr><td>Componente estrutural<\/td><td>Bom<\/td><td>Nenhuma necess\u00e1ria<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 id=\"h-1045-vs-o1-the-minimum-tool-steel-upgrade\" class=\"wp-block-heading\">1045 vs O1: A Melhoria M\u00ednima para A\u00e7os-Ferramenta<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Os a\u00e7os 1045 e O1 s\u00e3o por vezes considerados para a mesma produ\u00e7\u00e3o de ferramentas leves e de baixo custo, mas n\u00e3o pertencem \u00e0 mesma categoria. O a\u00e7o O1 possui aproximadamente o dobro de carbono em compara\u00e7\u00e3o com o 1045, al\u00e9m de mangan\u00eas, cromo e tungst\u00eanio em quantidades significativas. Esse maior teor de carbono e de liga \u00e9 o que permite ao O1 formar carbonetos, endurecer em \u00f3leo com baixa distor\u00e7\u00e3o e manter o fio de corte.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>Propriedade<\/td><td>1045<\/td><td>O1<\/td><\/tr><tr><td>Carbono<\/td><td>~0.45%<\/td><td>~0.90%<\/td><\/tr><tr><td>Liga principal<\/td><td>Apenas mangan\u00eas<\/td><td>Mn, Cr, W<\/td><\/tr><tr><td>Resist\u00eancia ao desgaste<\/td><td>Pobre<\/td><td>Moderado, proveniente de carbonetos de Cr e W.<\/td><\/tr><tr><td>Temperabilidade<\/td><td>Superficial (resfriamento em \u00e1gua)<\/td><td>Bom (resfriamento em \u00f3leo)<\/td><\/tr><tr><td>Estabilidade dimensional<\/td><td>Ruim (distor\u00e7\u00e3o por resfriamento r\u00e1pido)<\/td><td>Bom (resfriamento em \u00f3leo)<\/td><\/tr><tr><td>dureza m\u00e1xima<\/td><td>~55 HRC (sec\u00e7\u00e3o fina)<\/td><td>58\u201362 HRC<\/td><\/tr><tr><td>Usinabilidade (recozido)<\/td><td>Excelente<\/td><td>Bom<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Para qualquer trabalho em que voc\u00ea considere usar o a\u00e7o 1045 como ferramenta ou matriz, o O1 \u00e9 a melhoria m\u00ednima sensata. Ele oferece melhor temperabilidade, maior dureza, resist\u00eancia real ao desgaste e menor distor\u00e7\u00e3o a um custo ainda modesto.<\/p>\n\n\n\n<h2 id=\"h-surface-hardening-a-partial-solution\" class=\"wp-block-heading\">Endurecimento superficial: uma solu\u00e7\u00e3o parcial<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">O endurecimento por indu\u00e7\u00e3o ou por chama pode conferir ao a\u00e7o 1045 uma camada superficial dura de 50-58 HRC sobre um n\u00facleo resistente, o que \u00e9 adequado para superf\u00edcies de desgaste em eixos e pe\u00e7as similares. No entanto, isso n\u00e3o torna o 1045 um substituto para o a\u00e7o ferramenta. A camada superficial \u00e9 fina, geralmente de 1 a 5 mm, e assenta sobre um n\u00facleo macio que n\u00e3o consegue suport\u00e1-la sob cargas elevadas. Como o endurecimento superficial n\u00e3o adiciona carbonetos, a resist\u00eancia ao desgaste permanece limitada e a camada superficial pode trincar ou lascar sob alta tens\u00e3o de contato. A retifica\u00e7\u00e3o e o reendurecimento tamb\u00e9m alteram as dimens\u00f5es. Para ferramentas, \u00e9 necess\u00e1rio um a\u00e7o ferramenta com t\u00eampera integral e propriedades uniformes em toda a sua se\u00e7\u00e3o transversal.<\/p>\n\n\n\n<ul class=\"wp-block-yoast-seo-related-links yoast-seo-related-links\">\n<li><a href=\"https:\/\/aobosteel.com\/pt\/o1-tool-steel\/\">A\u00e7o para ferramentas O1 | 1.2510 | SKS3<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/aobosteel.com\/pt\/h13-steel-heat-treatment\/\">Guia de Tratamento T\u00e9rmico H13 | Aobo Steel<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/aobosteel.com\/pt\/s7-tool-steel-heat-treatment\/\">Guia de tratamento t\u00e9rmico do a\u00e7o ferramenta S7: temperatura, dureza e processo<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/aobosteel.com\/pt\/o1-steel-hardness\/\">Dureza do a\u00e7o O1: Guia HRC para recozimento, t\u00eampera e revenido<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/aobosteel.com\/pt\/blog\/best-hrc-for-d2-tool-steel\/\">Qual a dureza Rockwell C (HRC) ideal para o a\u00e7o ferramenta D2: 58\u201360 ou 60\u201362 HRC?<\/a><\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>1045 vs Tool Steel 1045 (AISI\/SAE 1045, also designated C45 under EN\/DIN and S45C under JIS) is a medium-carbon steel used for machine parts, shafts, and components that need moderate strength. It is not a tool steel and should not be substituted for one. What Is 1045 Steel? 1045 is a medium-carbon steel with roughly [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":15994,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"disabled","ast-breadcrumbs-content":"","ast-featured-img":"disabled","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[22],"tags":[],"class_list":["post-15993","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.5 (Yoast SEO v28.5) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>1045 Steel vs Tool Steel: When Each Is Used - AoboSteel<\/title>\n<meta name=\"description\" content=\"1045 is a medium-carbon steel, not a tool steel. 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It is not a tool steel and should not be substituted for one. 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It is not a tool steel and should not be substituted for one. What Is 1045 Steel? 1045 is a medium-carbon steel with roughly&hellip;","_links":{"self":[{"href":"https:\/\/aobosteel.com\/pt\/wp-json\/wp\/v2\/posts\/15993","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/aobosteel.com\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/aobosteel.com\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/aobosteel.com\/pt\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/aobosteel.com\/pt\/wp-json\/wp\/v2\/comments?post=15993"}],"version-history":[{"count":1,"href":"https:\/\/aobosteel.com\/pt\/wp-json\/wp\/v2\/posts\/15993\/revisions"}],"predecessor-version":[{"id":18346,"href":"https:\/\/aobosteel.com\/pt\/wp-json\/wp\/v2\/posts\/15993\/revisions\/18346"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/aobosteel.com\/pt\/wp-json\/wp\/v2\/media\/15994"}],"wp:attachment":[{"href":"https:\/\/aobosteel.com\/pt\/wp-json\/wp\/v2\/media?parent=15993"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aobosteel.com\/pt\/wp-json\/wp\/v2\/categories?post=15993"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aobosteel.com\/pt\/wp-json\/wp\/v2\/tags?post=15993"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}