high chrome and low chrome casting steel ball, diameter:17-170mm,no breakage, even wearing, no wearing,adn ... high hardness etc High chrome or low chrome casting steel ball are extensive used in mines, cement build materials, metal ... material etc powder prepared.chemical elements.high chrome casting steel ball:c:2.0-2.8,si:<1.0,mn: ... 5,p:<0.10,s<0.06middle chrome casting steel ball:c:2.1-3.2,si:0.5-2. ...