... wearing,adn high hardness etc High chrome or low chrome casting steel ball are extensive used in mines, cement build materials, metal mines ... and magnetic material etc powder prepared.chemical elements.high chrome casting steel ball:c:2.0-2.8,si:<1.0,mn:0 ... :0-1.5,p:<0.10,s<0.06middle chrome casting steel ball:c:2.1-3.2,si:0.5-2.2 ... 0-1.5,p:<0.10,s<0.06low chrome casting steel ball:c:2.2-3.6,si:<1.2,mn:0 ...