强度高，淬透性较大，脱碳倾向小，有过热敏感性，易生淬火裂纹，有回火脆性。主要用于机械制造，机车，汽车，抗磨损，耐热性能极佳！化学成分:钢号CSiMnMoCrPCuSNi 46S70.62-0.700.17-0.370.90-1.20≤0.250.0350.250.0350.25  供应弹簧钢主要有:SUP2 SUP3 SUP6 SUP7 SUP9 SUP10 SUP12等.彈簧鋼AISI記號JIS記號化 學 成 份C碳Si矽Mn錳P磷S硫Cu銅Cr鉻V釩SUP30.75-0.900.15-0.350.30-0.60≦0.035≦0.035≦0.030－－SUP60.56-0.641.50-1.800.70-1.00≦0.035≦0.035≦0.030－－9260SUP70.56-0.641.80-2.200.70-1.00≦0.035≦0.035≦0.030－－SUP90.52-0.600.15-0.350.65-0.95≦0.035≦0.035≦0.0300.65-0.95－SUP9A0.56-0.650.15-0.350.70-1.00≦0.035≦0.035≦0.0300.70-1.00－6150SUP100.47-0.550.15-0.350.65-0.95≦0.035≦0.035≦0.0300.80-1.100.15-0.25SUP11A0.56-0.640.15-0.350.70-1.00≦0.035≦0.035≦0.0300.70-1.00B≧0.00059254SUP120.51-0.590.15-0.350.60-0.90≦0.035≦0.035≦0.0300.60-0.90SUP130.56-0.640.15-0.350/70-1.00≦0.035≦0.035≦0.0300.70-0.90Mo0.25-0.35