SCM420 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: 0.60-0.85P: <0.030 S: <0.030CR: 0.90-1.20 NI: <0.25 MO:0.15-0.30 CU: <0.30
镍铬钼合金结构钢
SNCM220SNCM240 SNCM415SNCM420 SNCM431 SNCM439 SNCM447 SNCM616 SNCM625 SNCM630 SNCM815等
常用日本铬钢牌号:SCR415 SCR420 SCR430SCR435 SCR440 SRC445等
常用铬钼合金结构钢:SCM415 SCM418 SCM420 SCM430 SCM435SCM440等
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