C80W1,USAA-1,钢材的工艺性能 16MC5 20MB5 25b3 25m4 30mb5 34CD4 35B3 42CD4 50CV4 55S7 75Ni8RR 100Cr6RR 75n8 100C6 P195GH P235GH P265GH 8MoB5-4 10CrMo5-5 10CrMo9-10 11CrMo9-10 13CrMo4-5 14MoV6-3 15NiCuMoNb5-6-4