Alloy Structure Steel Bar (GB 42CrMo4/JIS SCM440) Baostool Industries Co., Ltd. Base Info Model NO.:GB 42CrMo4,JIS SCM440Specification:DIN, JIS, ASTM, AISI, BS, SS, ISO, TOCT, GBOrigin:Chinese Mainland Description Pre:En19 / Scm440 / SAE 4140 / 42CrMo4 Hot Rolled Qt Alloy Steel Round Bar Next:ASTM SAE 1045 Steel Equivalent / S45c C45 Cold Drawn Round Steel Bars