Forged Steel Ball: 1)Diameter:25-130 mm 2)Grinding endurable 3)Hardness: 52-65HRC 4)Material:50Mn,60Mn Forged Steel Ball:1.Material 50Mn,60Mn2.Diameter 25mm-130mm3.Characteristic High hardness, Grinding endurable ,None out-of-round, Low percentage of damage, High total mill efficiency.4.Apply Realm: Cement plan, mine , Mill tailings ,Thermal power generation, Chemical industry.5.Packing Jumbo bag ...