55Si2Mn弹簧钢硅和锰提高弹性强度和屈强比，提高淬透性，抗回火稳定性和抗松弛稳定性，过热敏感性也较小，但脱碳倾向较大，尤其是硅与碳含量较高时，碳易于石墨化，使钢变脆。55Si2Mn弹簧钢用作汽车、拖拉机和机车上的减振板簧和螺旋弹簧、气缸安全阀簧，还可用作250℃以下使用的耐热弹簧。
碳 C ：0.52～0.60
硅 Si：1.50～2.00
锰 Mn：0.60～0.90
硫 S ：≤0.035
磷 P ：≤0.035
铬 Cr：≤0.35
镍 Ni：≤0.35
铜 Cu：≤0.25
X2CrMoTi29-4 1.4003 1.4512 1.4516 1.4000 1.4002 1.4520 1.4016 1.4510 1.4595 1.4511 1.4113 1.4105 1.4513 1.4521 1.4523 1.4017 1.4589 1.4526 1.4590 1.4509 1.4592 X12Cr13 X12CrS13 X15Cr13 X20Cr13 X30Cr13 X29CrS13 X39Cr13 X46Cr13 X46CrS13 X38CrMo14 X55CrMo14 X50CrMoV15 X70CrMo15 X40CrMoVN16-2 X14CrMoS17 X39CrMo17-1 X105CrMo17 X90CrMoV18 X17CrNi16-2 X1CrNiMoCu12-5-2 X2CrNiMoV13-5-2 X3CrNiMo13-4 X4CrNiM X1CrNiMoAlT X1CrNiMoAlT X5CrNiCuNb16-4 X7CrNiAl17-7 X5CrNiMoCuNb14-5 X5NiCrTiMoVB 1.4006 1.4005 1.4024 1.4021 1.4028 1.4029 1.4031 1.4034 1.4035 1.4419 1.4110 1.4116 1.4109 1.4123 1.4104 1.4122 1.4125 1.4112 1.4057 1.4422 1.4423 1.4415 1.4313 1.4418 1.4530 1.4596 1.4542 1.4568 1.4594 1.4606 X5CrNi17-7 X10CrNi18-8 X9CrNi18-9 X2CrNiN18-7 X2CrNi18-9 X2CrNi19-11 X5CrNiN19-9 X2CrNiN18-10 X5CrNi18-10 X8CrNiS18-9 X6CrNiTi18-10 X6CrNiNb18-10 X4CrNi18-12 X1CrNi25-21 X2CrNiM X2CrNiMoN X5CrNiM X1CrNiMoN X6CrNiMoT X6CrNiMoNb X2CrNiM X2CrNiMoN X3CrNiM X3CrNiM X2CrNiM X2CrNiMoN X2CrNiM X2CrNiMoN X1CrNiMoCuN X1CrNiS X11CrNiMnN19-8-6 X12CrMnNiN17-7-5 X2CrMnNiN17-7-5 X12CrMnNiN18-9-5 X8CrMnNiN18-9-5 X8CrMnCuNB17-8-3 X3CrNiCu19-9-2 X2CrNiCu19-10 X6CrNiCuS18-9-2 X3CrNiCu18-9-4 X3CrNiCuM X1NiCrMoCu 1.4319 1.4310 1.4325 1.4318 1.4307 1.4306 1.4315 1.4311 1.4301 1.4305 1.4541 1.4550 1.4303 1.4335 1.4404 1.4406 1.4401 1.4466 1.4571 1.4580 1.4432 1.4429 1.4436 1.4449 1.4435 1.4434 1.4438 1.4439 1.4652 1.4361 1.4369 1.4372 1.4371 1.4373 1.4374 1.4597 1.4560 1.4650 1.4570 1.4567 1.4578 1.4563 X1NiCrMoCu X1CrNiMoCuN X1CrNiMoCuN X2CrNiMoCuS X1CrNiMoCuNW X1NiCrMoCuN X2NiCrAlTi32-20 X2CrNiMnMoN X2CrNiN23-4 X2CrNiCuN23-4 X3CrNiMoN27-5-2 X2CrNiMoN29-7-2 X2CrNiMoN22-5-3 X2CrNiMoCuN25-6-3 X2CrNiMoN25-7-4 X2CrNiMoCuWN25-7-4 X2CrNiMoS X10CrAlSi7 X10CrAlSi13 X10CrAlSi18 X10CrAlSi25 X18CrN28 X3CrAlTi18-2 X8CrNiTi18-10 X15CrNiSi20-12 X9CrNiSiNCe X12CrNi23-13 X8CrNi25-21 X15CrNiSi25-21 X12NiCrSi35-16
