常用合金弹簧钢的牌号

附表4.7常用合金弹簧钢的牌号、化学程分、热处理、力学性能及用途（摘自GB/T1222-1984）类别牌号化学成分w/%热处理力学性能用途举例CSiMnCrNiCuPS其他淬火温度/℃回火温度/℃σS/MPaσb/MPaδ5/%δ10/%ψ/J不小于不小于硅锰系55Si2Mn0.520.601.502.000.600.90≤0.350.350.250.0350.035870油48011771275630有较好的淬透性，较高的弹性极限、屈服点和疲劳极限，广泛用于汽车、拖拉机、铁道车辆的弹簧、卷止回阀和安全弹簧，并可作250℃以下使用的耐热弹簧55Si2MnB0.520.601.502.000.600.90≤0.350.350.250.0350.035B：0.0050.004870油4801177127563060Si2Mn0.560.641.502.000.600.90≤0.350.350.250.0350.035V：0.080.16B：0.00050.0035870油4801177127552555SiMnVB0.520.600.701.001.001.30≤0.350.350.250.0350.035860油46012261373530硅铬系60Si2CrA0.560.641.401.800.400.700.701.000.350.250.0300.030V：0.100.20870油42015691765620用作承受重载荷和重要的大型螺旋弹簧和板簧，如汽轮机汽封弹簧、调节阀和冷凝器弹簧等，并可作300℃以下的耐热弹簧60Si2CrVA0.560.641.401.800.400.700.901.200.350.250.0300.030850油41016671863620铬锰系55CrMnA0.520.600.170.370.650.950.650.950.350.250.0300.030830860油460-510σr0.210791226920用作载荷较重、应力较大的载重汽车、拖拉机和小轿车的板簧和直径较大（50mm）的螺旋弹簧60CrMnA0.560.640.170.370.701.000.701.000.350.250.0300.030830860油460-520σr0.210791226920铬钒系50CrVA0.460.640.170.370.500.800.801.100.350.250.0300.030V：0.100.20850油500112812751040用作特别重要的，承受大应力的各种尺寸的螺旋弹簧，并可作400℃以下工作的耐热弹簧30W4Cr2VA0.260.340.170.37≤0.402.002.500.350.250.0300.030V：0.500.80W：4.004.5010501100油60013241471740用作高温（≤500℃）下使用的重要弹簧，如锅炉主安全阀弹簧等注：表列性能适用于截面单边尺寸≤80mm的钢材