casting grinding balls, from 10mm-150mm, Cr from 1%-28%. 

Our products are high hardness:surface hardness of casting iron balls is to HRC 58-65. The toleranc of the core hardness and surface hardness is not over 2 HRC;

good impact toughness: impact toughness of chrome balls is more than 4J/cm2;low broken rate:the actural broken rate is higher than 1%,

good wear-resistantance:the wearing rate of high cast iron ball is 30-50g/ton in cement industry,350-430 g in gold mines and even lower in some iron mines. 

more info please visit http://www.sgnmcl.com