SCM435 JIS合金结构钢 (铬钼钢)主要化学成份%: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镍铬钼合金结构钢SNCM220 SNCM240 SCNM415 SNCM415 SNCM420 SNCM431 SNCM439 SNCM447 SNCM616 SNCM625 SNCM630 SNCM815等常用日本铬钢牌号: SCR415 SCR420 SCR430 SCR435  SCR440 SRC445等常用铬钼合金结构钢:SCM415 SCM418 SCM420 SCM430。