1. Forged grinding steel balls
Size: 20mm -150mm      
Hardness: HRC55-65
Chemical elements: C: 0.48-0.80; Si: 0.17-0.37; Mn: 0.6-1.2; S & P: 0.035Max;
2.High chrome casting balls
Size: 20mm -120mm
Hardness:HRC58-65;