high chrome and low chrome casting steel ball, diameter:17-170mm,no breakage, ... adn high hardness etc High chrome or low chrome casting steel ball are extensive used in mines, cement ... material etc powder prepared.chemical elements.high chrome casting steel ball:c:2.0-2.8,si:< ... .5,p:<0.10,s<0.06middle chrome casting steel ball:c:2.1-3.2,si: ... .5,p:<0.10,s<0.06low chrome casting steel ball:c:2.2-3.6,si:< ...