Alloy spring steel is mainly silicon-manganese steel, their carbon content is slightly lower, and the performance is mainly improved by increasing the silicon content Wsi; in addition, there are alloy spring steels of iron, tungsten, and vanadium. 60Si2CrA 60Si2CrVA carbon steel spring steel strip High strength spring steel. High hardenability, good heat treatment performance. Due to the high strength, after the spring is rolled, the internal stress should be eliminated in time to manufacture important large springs with large loads. 60Si2CrA can be used to manufacture steam turbine seal springs, adjustment springs, condenser support springs, high-pressure water pump disc springs, etc. 60Si2CrVA carbon steel spring steel strip is also used to make very important springs, such as conventional weapon springs and crusher springs. 60CrMnA carbon steel spring steel strip The outstanding advantage is good hardenability, and also has good thermal processing performance, comprehensive mechanical properties, and decarburization resistance. Various important springs with large cross-sections, such as large leaf springs and coil springs for automobiles and locomotives.