... 1 max,S: 0.1 max. Medium Chromium Alloyed Cast Grinding BallSpecificationφ12,φ15,φ17,φ20,φ25,φ30 ... Medium Chromium Alloyed Cast Grinding Ball is widely used in cement building materials, metal mining, coal paste thermal power plants, chemical engineering, ceramic ... coating, light industry, magnetic materials. Our grinding ball has the characterisitic of high ...