Spring steel This steel is produced according to GB/T1222, JIS, DIN, ASTM standards, and the representative steel grades are 60Si2CrVA, 60Si2MnA, 55CrMnA, 55SiMnVB, 55CrVA, 55Cr3, SAE5160, SuP9(A), 51CrV4, 55Cr3, etc.Main application: Spring steel is made into important mechanical parts widely used for automobile, tractor, railway vehicle and instrument industry.