1)High-quality spring steel, wear-resistant, anti-bending. 2)After oil quenching, higher intensity, the surface clean.

 Oil tempered cold roll steel

Tensile strength:                 225,000 – 255,000 PSI              15,820 – 17,929 kg / sq. cm.

Hardness:                 44 – 48 Rockwell “C”

size: Production as needed 

Oil quenching spring steel wire