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{"id":2001,"date":"2023-02-14T12:09:37","date_gmt":"2023-02-14T12:09:37","guid":{"rendered":"https:\/\/waldunsteel.com\/?p=2001"},"modified":"2024-04-12T06:43:05","modified_gmt":"2024-04-12T06:43:05","slug":"what-is-aisi-4140-alloy-steel","status":"publish","type":"post","link":"https:\/\/waldunsteel.com\/pt\/o-que-e-aisi-4140-liga-de-aco\/","title":{"rendered":"O que \u00e9 a\u00e7o liga AISI 4140"},"content":{"rendered":"
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O que \u00e9 o A\u00e7o 4140?<\/b><\/strong><\/span><\/h1>\n

A\u00e7o AISI 4140<\/u><\/a>\u00a0\u00e9 um tipo de a\u00e7o de baixa liga incorporado com mangan\u00eas, molibd\u00eanio e cromo. Ao contr\u00e1rio de outros tipos, o a\u00e7o 4140 n\u00e3o \u00e9 t\u00e3o dif\u00edcil e dif\u00edcil de distinguir. No entanto, como existem centenas e centenas de fornecedores e fabricantes de a\u00e7o AISI 4140, escolher o melhor \u00e9 um desafio. Al\u00e9m disso, nem todos os a\u00e7os 4140 s\u00e3o iguais. \u00c9 para isso que serve este guia espec\u00edfico! Vamos educ\u00e1-lo em termos de como voc\u00ea pode escolher qual a\u00e7o 4140 comprar e comprar, bem como orient\u00e1-lo em qual fabricante ou fornecedor confiar!<\/p>\n

O QUE \u00c9 O AISI NO A\u00c7O 4140?<\/b><\/strong><\/span><\/h2>\n

O AISI \u00e9 um acr\u00f4nimo ou um termo curto para o American Iron and Steel Institute. \"o Imagem de a\u00e7os AISI 4140 colocados sendo preparados para distribui\u00e7\u00e3o Significa o procedimento ou m\u00e9todo de fabrica\u00e7\u00e3o de determinado tipo de a\u00e7o. Ent\u00e3o, voc\u00ea pode pensar no a\u00e7o AISI 4140 como um a\u00e7o que foi processado atrav\u00e9s de seus termos.<\/p>\n

ESPECIFICA\u00c7\u00d5ES COMUNS DO A\u00c7O 4140<\/strong><\/span><\/h2>\n\n\n\n\n\n
Pa\u00eds<\/strong><\/td>\nEUA<\/td>\nalem\u00e3o<\/td>\nBrit\u00e2nico<\/td>\nJap\u00e3o<\/td>\nChina<\/td>\nAustr\u00e1lia<\/td>\n<\/tr>\n
Padr\u00e3o<\/strong><\/td>\nASTM A29<\/span><\/td>\nDIN 17200<\/td>\nBS 970<\/span><\/td>\nJIS G4105<\/span><\/td>\nGB \/ T 3077<\/td>\nAS 1444<\/td>\n<\/tr>\n
Notas<\/strong><\/td>\n4140<\/td>\n1,7225\/ 42crmo4<\/span><\/td>\n42CrMo4<\/td>\nSCM440<\/td>\n42CrMo<\/td>\n4140<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

BARRA DE A\u00c7O 4140 COMPOSI\u00c7\u00c3O QU\u00cdMICA<\/strong><\/span><\/h2>\n\n\n\n\n\n\n
Padr\u00e3o<\/strong><\/td>\nGrau<\/strong><\/td>\nC<\/strong><\/td>\nMn<\/strong><\/td>\nP<\/strong><\/td>\nS<\/strong><\/td>\nSi<\/strong><\/td>\nNi<\/strong><\/td>\nCr<\/strong><\/td>\nMo<\/strong><\/td>\n<\/tr>\n
ASTM A29<\/td>\n4140<\/td>\n0,38-0,43<\/td>\n0,75-1,00<\/td>\n0,035<\/td>\n0,040<\/td>\n0,15-0,35<\/td>\n-<\/td>\n0,8-1,10<\/td>\n0,15-0,25<\/td>\n<\/tr>\n
EN 10250<\/td>\n42CrMo4\/ 1,7225<\/td>\n0,38-0,45<\/td>\n0,6-0,9<\/td>\n0,035<\/td>\n0,035<\/td>\n0,4<\/td>\n-<\/td>\n0,9-1,2<\/td>\n0,15-0,30<\/td>\n<\/tr>\n
JIS G4105<\/td>\nSCM440<\/td>\n0,38-0,43<\/td>\n0,60-0,85<\/td>\n0,03<\/td>\n0,03<\/td>\n0,15-0,35<\/td>\n-<\/td>\n0,9-1,2<\/td>\n0,15-0,30<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

PROPRIEDADES MEC\u00c2NICAS DA LIGA AISI 4140 BARRA, PLACAS, QUADRADO<\/strong><\/span><\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Propriedades<\/strong><\/td>\nM\u00e9trica<\/strong><\/td>\nImperial<\/strong><\/td>\n<\/tr>\n
Resist\u00eancia \u00e0 tra\u00e7\u00e3o<\/td>\n655 MPa<\/td>\n95000 psi<\/td>\n<\/tr>\n
For\u00e7a de rendimento<\/td>\n415 MPa<\/td>\n60200psi<\/td>\n<\/tr>\n
M\u00f3dulo de massa (t\u00edpico para a\u00e7o)<\/td>\n140 GPa<\/td>\n20300 ksi<\/td>\n<\/tr>\n
M\u00f3dulo de cisalhamento (t\u00edpico para a\u00e7o)<\/td>\n80 GPa<\/td>\n11600 ksi<\/td>\n<\/tr>\n
M\u00f3dulo el\u00e1stico<\/td>\n190-210 GPa<\/td>\n27557-30458 ksi<\/td>\n<\/tr>\n
Coeficiente de Poisson<\/td>\n0,27-0,30<\/td>\n0,27-0,30<\/td>\n<\/tr>\n
Alongamento na ruptura (em 50 mm)<\/td>\n25.70%<\/td>\n25.70%<\/td>\n<\/tr>\n
Dureza, Brinell<\/td>\n197<\/td>\n197<\/td>\n<\/tr>\n
Dureza, Knoop (convertida a partir da dureza Brinell)<\/td>\n219<\/td>\n219<\/td>\n<\/tr>\n
Dureza, Rockwell B (convertido a partir da dureza Brinell)<\/td>\n92<\/td>\n92<\/td>\n<\/tr>\n
Dureza, Rockwell C (convertido de dureza Brinell. Valor abaixo da faixa HRC normal, apenas para fins de compara\u00e7\u00e3o)<\/td>\n13<\/td>\n13<\/td>\n<\/tr>\n
Dureza, Vickers (convertido da dureza Brinell)<\/td>\n207<\/td>\n207<\/td>\n<\/tr>\n
Usinabilidade (baseado em AISI 1212 como 100 usinabilidade)<\/td>\n65<\/td>\n65<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

QUAL \u00c9 A COMPOSI\u00c7\u00c3O QU\u00cdMICA DO A\u00c7O 4140?<\/b><\/strong><\/span><\/h2>\n

Para come\u00e7ar, \u00e9 imprescind\u00edvel que conhe\u00e7amos o composto de a\u00e7o AISI 4140. Na verdade, \u00e9 composto pelos seguintes elementos:<\/p>\n