SCM420 JIS合金結構鋼 (鉻鉬鋼)

主要化學成份%:        

C: 0.18-0.23 SI: 0.15-0.35 MN: 0.60-0.85 P: <0.030 S: <0.030 CR: 0.90-1.20 NI: <0.25 MO:0.15-0.30 CU: <0.30

鎳鉻鉬合金結構鋼

SNCM220 SNCM240 SNCM415 SNCM420 SNCM431 SNCM439 SNCM447 SNCM616 SNCM625 SNCM630 SNCM815等

常用日本鉻鋼牌號: SCR415 SCR420 SCR430 SCR435  SCR440 SRC445等

常用鉻鉬合金結構鋼:SCM415 SCM418 SCM420 SCM430 SCM435 SCM440等