3T.53 T.54 T.55 合金SNCM240 SNCM415 SNCM420 SNCM431 SNCM439 SNCM447 SNCM616 SNCM625 SNCM630 SNCM815 SCM415 SCM418 SCM420 SCM421 SCM430 SCM432 SCM435? SCM440 SCM882 SACM645 SMn420H SMn433H SMn438H SMn443H SMnC420H SMnC443H SCr415H SCr420H SCr430H SCr435H SCr440H SNC415H SNC631H SNC815H SNCM220H SNCM420H 元素含量较低的热作模具钢,具有良好的韧性、强度和耐磨性,由于钢中好友钼,对回火脆性不敏感,钢的淬透性好
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