{"id":20214,"date":"2026-09-29T05:15:22","date_gmt":"2026-09-28T21:15:22","guid":{"rendered":"https:\/\/aobosteel.com\/?page_id=20214"},"modified":"2026-10-16T00:17:01","modified_gmt":"2026-10-15T16:17:01","slug":"m2-steel-specifications","status":"publish","type":"page","link":"https:\/\/aobosteel.com\/pt\/m2-steel-specifications\/","title":{"rendered":"Especifica\u00e7\u00f5es do a\u00e7o r\u00e1pido M2 por norma"},"content":{"rendered":"

Especifica\u00e7\u00f5es do a\u00e7o r\u00e1pido M2 por norma<\/h1>\n\n\n\n

O que as especifica\u00e7\u00f5es americana, brit\u00e2nica e alem\u00e3 permitem para o a\u00e7o r\u00e1pido M2, com ambos os extremos das faixas brit\u00e2nica e alem\u00e3 impressos e o balan\u00e7o de carbono do grau calculado na mesma p\u00e1gina. Um resumo de refer\u00eancia da pr\u00e1tica publicada e n\u00e3o uma especifica\u00e7\u00e3o da Aobo Steel.<\/p>\n\n\n\n

Tr\u00eas especifica\u00e7\u00f5es, um grau<\/h2>\n\n\n\n

O M2 chega ao comprador sob v\u00e1rios nomes. A designa\u00e7\u00e3o americana \u00e9 M2, a alem\u00e3 e internacional \u00e9 1.3343 ou HS 6-5-2, a japonesa \u00e9 SKH51, a brit\u00e2nica \u00e9 BM2 e a chinesa \u00e9 W6Mo5Cr4V2, e o com\u00e9rcio os trata como um \u00fanico grau. As composi\u00e7\u00f5es que as especifica\u00e7\u00f5es por tr\u00e1s desses nomes permitem n\u00e3o s\u00e3o as mesmas. O documento americano imprime valores pontuais para cada elemento, enquanto a BS 4659 e a DIN 17 350 imprimem faixas, e a fonte registra a vis\u00e3o de que a latitude nessas faixas \u00e9 ampla o suficiente para importar, porque uma corrida no topo dos formadores de carboneto com o fundo da faixa de carbono \u00e9 um a\u00e7o diferente de uma corrida no canto oposto.<\/p>\n\n\n\n

A tabela abaixo imprime ambos os cantos das especifica\u00e7\u00f5es brit\u00e2nica e alem\u00e3 conforme a fonte os apresenta. A linha A \u00e9 o topo dos formadores de carboneto com o fundo da faixa de carbono, e a linha B \u00e9 o inverso. Ler as duas linhas uma contra a outra mostra quanto espa\u00e7o uma \u00fanica especifica\u00e7\u00e3o deixa dentro de um nome de grau.<\/p>\n\n\n\n

A\u00e7os do tipo M2 por especifica\u00e7\u00e3o<\/h2>\n\n\n\n

Composi\u00e7\u00e3o conforme cada especifica\u00e7\u00e3o permite, percentual<\/h3>\n\n\n\n
Especifica\u00e7\u00e3o<\/th>V<\/th>W<\/th>Mo<\/th>Cr<\/th>C<\/th>Varia\u00e7\u00e3o do SCE em rela\u00e7\u00e3o ao valor ideal<\/th><\/tr><\/thead>
M2<\/td>2<\/td>6<\/td>5<\/td>4<\/td>0.85<\/td>-0.26<\/td><\/tr>
M2 (alto carbono)<\/td>2<\/td>6<\/td>5<\/td>4<\/td>1.105<\/td>0 (balanceado)<\/td><\/tr>
BM2 (A)<\/td>2.05<\/td>6.75<\/td>5.5<\/td>4.5<\/td>0.8<\/td>-0.4<\/td><\/tr>
BM2 (B)<\/td>1.75<\/td>6.0<\/td>4.75<\/td>3.75<\/td>0.9<\/td>-0.13<\/td><\/tr>
S 6-5-2 (A)<\/td>2.0<\/td>6.7<\/td>5.2<\/td>4.5<\/td>0.86<\/td>-0.16<\/td><\/tr>
S 6-5-2 (B)<\/td>1.7<\/td>6.0<\/td>4.7<\/td>3.8<\/td>0.94<\/td>-0.08<\/td><\/tr>
SC 6-5-2 (A)<\/td>2.0<\/td>6.7<\/td>5.2<\/td>4.5<\/td>0.95<\/td>-0.07<\/td><\/tr>
SC 6-5-2 (B)<\/td>1.7<\/td>6.0<\/td>4.7<\/td>3.8<\/td>1.05<\/td>+0.03<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Fonte, compara\u00e7\u00e3o de composi\u00e7\u00e3o para a\u00e7os r\u00e1pidos do tipo M2, p\u00e1gina 97 impressa.<\/em><\/p>\n\n\n\n

Todos os valores s\u00e3o percentuais em peso, e a \u00faltima coluna \u00e9 expressa em pontos percentuais de carbono. A tabela imprime duas linhas para cada especifica\u00e7\u00e3o brit\u00e2nica e alem\u00e3, e a fonte as explica na mesma p\u00e1gina. A linha A d\u00e1 o limite superior para os formadores de carboneto e o limite inferior para o carbono, a linha B d\u00e1 o limite inferior para os formadores de carboneto e o limite superior para o carbono. O M2 vem do AISI Production Manual, Tool Steels, 1981, o BM2 da BS 4659, e o S 6-5-2 e o SC 6-5-2 da DIN 17 350. Os dados de composi\u00e7\u00e3o s\u00e3o apenas para refer\u00eancia geral, os valores reais variam por norma, usina e n\u00famero de corrida, portanto confirme os n\u00fameros contra o certificado de ensaio do material da corrida ou consulte a Aobo Steel.<\/em><\/p>\n\n\n\n

O balan\u00e7o de carbono do grau<\/h2>\n\n\n\n

Carbono que os formadores de carboneto consomem, por 1 por cento de cada elemento<\/h3>\n\n\n\n
Elemento formador de carboneto<\/th>Carbono por 1 por cento do elemento<\/th><\/tr><\/thead>
Tungst\u00eanio<\/td>0.033<\/td><\/tr>
Molibd\u00eanio<\/td>0.063<\/td><\/tr>
Van\u00e1dio<\/td>0.176<\/td><\/tr>
Cromo<\/td>0.060<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Fonte, compara\u00e7\u00e3o de composi\u00e7\u00e3o para a\u00e7os r\u00e1pidos do tipo M2, p\u00e1gina 97 impressa.<\/em><\/p>\n\n\n\n

A mesma nota imprime os quatro fatores usados para calcular quanto carbono os formadores de carboneto em um a\u00e7o r\u00e1pido v\u00e3o consumir. O total para um dado a\u00e7o \u00e9 o seu equivalente estequiom\u00e9trico de carbono, e a \u00faltima coluna da tabela acima \u00e9 esse total menos o carbono que a pr\u00f3pria especifica\u00e7\u00e3o permite, ent\u00e3o um valor negativo \u00e9 um a\u00e7o que a especifica\u00e7\u00e3o permite ficar aqu\u00e9m do carbono que seus pr\u00f3prios formadores de carboneto exigem.<\/em><\/p>\n\n\n\n

Os n\u00fameros que a fonte imprime para o pr\u00f3prio M2 comprovam o ponto. Partindo da composi\u00e7\u00e3o da matriz de uma amostra temperada, o equivalente estequiom\u00e9trico total de carbono dos formadores de carboneto \u00e9 1,13, enquanto a especifica\u00e7\u00e3o do M2 permite 0,85 por cento de carbono, uma defici\u00eancia de 0,28 por cento. O mesmo racioc\u00ednio aplicado aos limites da especifica\u00e7\u00e3o BM2 d\u00e1 uma defici\u00eancia de 0,4 por cento de carbono no caso mais adverso e 0,12 por cento no melhor caso. A \u00faltima coluna da tabela de composi\u00e7\u00e3o acima \u00e9 a mesma medida calculada sobre as linhas impressas naquela tabela, raz\u00e3o pela qual l\u00ea -0,26 para o M2 em vez de -0,28. Os dois n\u00fameros v\u00eam da mesma p\u00e1gina e diferem apenas em qual composi\u00e7\u00e3o entrou na soma.<\/p>\n\n\n\n

O que uma defici\u00eancia de carbono faz \u00e9 apresentado na mesma p\u00e1gina. O endurecimento irregular \u00e9 o resultado relatado, juntamente com varia\u00e7\u00e3o local na composi\u00e7\u00e3o dentro da estrutura, e uma amostra mal segregada pode conter \u00e1reas de grave escassez de carbono ao lado de \u00e1reas com excesso de carbono, o que a liqua\u00e7\u00e3o no endurecimento ent\u00e3o penaliza. A linha equilibrada na tabela \u00e9 a vers\u00e3o de alto carbono do M2 com 1,105 por cento de carbono, e a fonte registra o que essa vers\u00e3o custa. Ele ret\u00e9m mais austenita<\/a> ap\u00f3s a t\u00eampera, ent\u00e3o um revenimento triplo \u00e9 frequentemente recomendado, e ap\u00f3s m\u00faltiplos revenimentos ele termina um ou dois pontos HRC mais duro que o produto convencional. Ele tamb\u00e9m engrossa o gr\u00e3o mais prontamente que o a\u00e7o de menor carbono no topo da faixa de austenitiza\u00e7\u00e3o, que \u00e9 onde o teor de van\u00e1dio do grau importa, j\u00e1 que o carboneto que o van\u00e1dio forma \u00e9 o que mant\u00e9m o contorno de gr\u00e3o no lugar.<\/p>\n\n\n\n

As faixas p\u00fablicas n\u00e3o s\u00e3o o que a maior parte do com\u00e9rcio segue. A fonte afirma que a maioria dos fabricantes adota normas internas com limites muito mais apertados do que as especifica\u00e7\u00f5es permitem, o que \u00e9 uma raz\u00e3o pela qual duas corridas do mesmo grau nominal de duas usinas podem se comportar de forma diferente no mesmo forno.<\/p>\n\n\n\n

O que verificar em um certificado<\/h2>\n\n\n\n

A leitura pr\u00e1tica de tudo isso \u00e9 que um nome de grau fixa menos do que aparenta. Tr\u00eas coisas vale a pena pedir em um pedido de M2. A an\u00e1lise da corrida contra a especifica\u00e7\u00e3o que o pedido nomeia, com carbono e van\u00e1dio lidos contra os outros formadores de carboneto em vez de isoladamente. A norma interna que a usina seguiu, j\u00e1 que \u00e9 a\u00ed que est\u00e3o os limites reais. E o certificado da corrida que foi realmente enviada, conferido contra a marca\u00e7\u00e3o no material. Esta p\u00e1gina imprime o que as especifica\u00e7\u00f5es publicadas permitem, n\u00e3o \u00e9 uma declara\u00e7\u00e3o do que qualquer usina fornece, e n\u00e3o \u00e9 uma especifica\u00e7\u00e3o da Aobo Steel.<\/p>\n\n\n\n

\n

Especifica\u00e7\u00f5es do a\u00e7o r\u00e1pido M2, PDF para impress\u00e3o<\/strong><\/p>\n\n

A compara\u00e7\u00e3o de composi\u00e7\u00e3o para as especifica\u00e7\u00f5es americana, brit\u00e2nica e alem\u00e3, os fatores de carbono e o balan\u00e7o de carbono desta p\u00e1gina em um PDF, com nossos dados de contato.<\/p>\n\n

\n
Baixar PDF, 380 KB<\/a><\/div>\n\n<\/div>\n<\/div>\n\n\n\n

Dados de refer\u00eancia relacionados<\/h2>\n\n\n\n

A lista completa de designa\u00e7\u00f5es do grau, sua tabela de composi\u00e7\u00e3o e suas formas de fornecimento est\u00e3o na p\u00e1gina do a\u00e7o para ferramentas M2<\/a>. O ciclo de tratamento t\u00e9rmico est\u00e1 exposto na Guia de tratamento t\u00e9rmico do a\u00e7o ferramenta M2<\/a> e a faixa de dureza de trabalho na p\u00e1gina de dureza do a\u00e7o para ferramentas M2<\/a>. A qu\u00edmica de cada grau nos grupos de a\u00e7os para ferramentas est\u00e1 na Tabela de composi\u00e7\u00e3o de a\u00e7os para ferramentas<\/a>, e a refer\u00eancia cruzada mais ampla est\u00e1 na Tabela de graus equivalentes de a\u00e7o para ferramentas<\/a>. As temperaturas em todos os graus ao tungst\u00eanio est\u00e3o na gr\u00e1fico de revenimento do a\u00e7o r\u00e1pido ao tungst\u00eanio<\/a>, a fam\u00edlia \u00e9 coletada no cat\u00e1logo de a\u00e7os r\u00e1pidos<\/a>, e a sele\u00e7\u00e3o para trabalho de corte \u00e9 abordada no guia de sele\u00e7\u00e3o para a\u00e7os r\u00e1pidos de ferramenta de corte<\/a>.<\/p>\n\n\n\n

Dados de refer\u00eancia compilados de High Speed Steels (Geoffrey Hoyle, Butterworths, 1988). A compara\u00e7\u00e3o de composi\u00e7\u00e3o, ambas as linhas das especifica\u00e7\u00f5es brit\u00e2nica e alem\u00e3, os fatores de carbono e o balan\u00e7o de carbono trabalhado v\u00eam todos da p\u00e1gina impressa 97.<\/p>","protected":false},"excerpt":{"rendered":"

M2 High Speed Steel Specifications by Standard What the American, British and German specifications permit for M2 high speed steel, with both ends of the British and German ranges printed and the carbon balance of the grade worked out on the same page. A reference summary of published practice and not an Aobo Steel specification. […]<\/p>\n","protected":false},"author":1,"featured_media":0,"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":"","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":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center 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BM2, S 6-5-2<\/title>\n<meta name=\"description\" content=\"What the AISI, British and German specifications allow for M2 high speed steel, with both ends of the BS 4659 and DIN 17350 ranges and the carbon balance figure on each line.\" \/>\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\/m2-steel-specifications\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"M2 High Speed Steel Specifications by Standard\" \/>\n<meta property=\"og:description\" content=\"What the AISI, British and German specifications allow for M2 high speed steel, with both ends of the BS 4659 and DIN 17350 ranges and the carbon balance figure on each line.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/aobosteel.com\/pt\/m2-steel-specifications\/\" \/>\n<meta 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