Rolling steel balls
Hebei Goldpro New Materials Technology Co., Ltd
Size: 20mm -150mm Hardness: HRC58-65; chemical elements:C: 0.30-0.57; Si: 0.17-0.35; Mn: 0.5-1.8; S & P: 0.036Max; Cr: 0.25Max.
Size: 20mm -150mm Hardness: HRC58-65; chemical elements:C: 0.30-0.57; Si: 0.17-0.35; Mn: 0.5-1.8; S & P: 0.036Max; Cr: 0.25Max.