Baosteel Group’s Special Steel Business Unit develops SUP9 spring steel

Chinese steel giant Baosteel Group's Special Steel Business Unit has succeeded in developing high-quality SUP9 spring steel. After carrying out trial production six times, the surface quality of the product is stable and physical and chemical test results are better than standard.
 
The high-quality spring steel in question is expected to be applied in the production of cars by Japanese manufacturers in China.