125mm Forged Mill Ball Introduction Good quality used in Mining Cement Capacity 100 000Tons Year Improvement 1 Diameter 20mm 165mm 4 5 to 6½ aprox 2 High Hardness Surface hardness of forged steel ball is to 60 68 HRC and volume hardness of forged grinding ball is to 60 65 HRC 3 High Impact Toughness The