It is suitable for all kinds of spring steel working under general machinery, heavy load and high temperature, hot rolled or forged into round, square, flat and special-shaped section spring steel. In addition to checking the chemical composition and mechanical properties on credit, the low magnification structure and decarburization depth should also be checked. The diameter of the round steel or the side length of the square steel is not more than 250mm, the thickness of the flat steel is 5-30mm, and the diameter of the steel wire is not more than 10mm.
Stainless steel cold rolled strip for spring (GB/T4231-1993)
1. Austenitic type: 1Crl7Ni7(SUS301), 0Crl9Ni9(SUS304) thickness 0.06mm-1.5mm
2. Martensitic type: 3Crl3 (SUS420J2)
3. Precipitation hardening type: 0Crl7Ni7A1 (SUS631,17-7PH)