cast iron casting steel grinding ball 1) High hardness 2) Low breakage 3) Good wear-resistant 4) Steady performance 1.Chemical composition: Casted grinding ball ItemCCrSiMnSPCuMoHardnessLow Chrome1.8 ... of forging balls.Product Features: No broken, wear-resistance, round, even hardness, high efficiency for mill.Production TechnicsRaw material(waste steel,waste iron,iron ...