Because of the spring steel is working under dynamic load conditions, the spring steel should have higher yield strength, so as it will not plastic deformed under heavy load; have higher fatigue strength which could has a longer service life under repeated loading; and enough toughness and plasticity, to prevent under impact force suddenly brittle fracture.
It is Mainly used for manufacturing a variety of spring, such as automobile, motorcycle, tractor spiral spring, automobile safety belt spring and some important spring force to work in high stress and wear serious spring.
【main steel grade and chemical consistent】
Full hard, semi hard, soft anneal, Spheroidizing annealed, Quenching and Tempering,
E0 Unprocessed edge
E1 Slit edge
E2 Slit edge, surface without burr
E3 Slit edge deburred
E4 90° squared edge, rounded corners
E5 Round edge
E6 90° squared edge, sharp
E7 90° squared edge, slightly beveled corners
E8 Convex rounded edge
E9 Cutting edge