Product brief introduction

After heat treatment and cold drawing hardening, strength is higher, has certain elasticity and plasticity;
Same surface hardening case, completely and the fatigue limit with colorful alloy spring.
But hardenability is very poor, it is mainly used for large size drop point of the spring, such as regulating speed naughty spring, spring load, general machinery of round, square spiral spring or pull wire for small mechanical spring.

Product Parameter

　　 C ：0.62～0.70
　　 Si：0.17～0.37
　　 Mn：0.90～1.20
　　 S ：≤0.035
　　 P ：≤0.035
　　 Cr：≤0.25
　    Ni：≤0.25
　　 Cu：≤0.25

Technical Equipment

65Mn Low alloy round steel must should have high elastic limit and showed high, to avoid the spring steel to produce permanent deformation under high load;
At the same time also require good hardenability and low sensitivity, decarburization makes the elastic limit slash;
And good surface quality, in the cold and hot state easy forming and good heat treatment processing technology.