(4130)
SCCrM1?
25CrMo, 20CrMo
ASTM A732 IC4140
1.7225
4140?
ZG42CrMo
ASTM A732 IC8620
1.6523
8620?
(20CrNiMo)
ASTM A732 IC8640
1.6546
8640?
(40CrNiMo)
工具钢
ASTM A597 CS-7
1.2357
S7
ASTM A597 CA-2
1.2363
A2
SKD12
2260?
ASTM A597 CH-13
1.2344
H13
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