45SiCrMo4的舊牌號(45SCD6)                                                                                             1. 化學成份: C:0.42-0.5
Si:1.30-1.70
Mn:0.5-0.8
P≤0.025
S≤0.025
Cr:0.5-0.75
Mo:0.2-0.3
Ni:-                                                                                                     2.淬火回火后的力學性能:
抗拉強度:1550-1850MPa
屈服強度:1400MPa
伸長率%:6
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