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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 SSNCM240 SCNM415 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
