化学成分(质量分数)(％)牌号AISICSiMnPSCuSUP130.56-0.640.15-0.350.70-1.00≦0.035≦0.0350.70-0.90Mo0.25-0.35热处理机械性质℃HeatTreatingMechanicalProperties淬火回火抗张强度延伸率硬度830-860油冷510-570≧125≧10363-429(≧1226))