1. Carbon spring steel
The carbon content (mass fraction) of carbon spring steel is generally 0.62% to 0.90%. According to its manganese content, it is divided into general manganese content (mass fraction) (0.50%~0.80%) such as 65, 70, 85 and higher manganese content (mass fraction) (0.90~1.20%), such as 65Mn.
2. Alloy spring steel
Alloy spring steel is based on carbon steel, by adding one or several alloying elements to improve the mechanical properties, hardenability and other properties of the steel, so as to meet the requirements of manufacturing various springs.
