We can produce chromium alloy casting balls, forged grinding balls, cast grinding balls, grinding cylpebs and hot-rolled steel balls. Cast Grinding Balls: Diameter 10mm-160mm, Hardness 46-68HRC, Breakage rate: <0.5%. The life of high chrome balls are 2-3 times of forged balls. Forged Grinding Balls: Diameter 20mm-160mm Material-We use the high quality bar as raw material. High end heat treatment technology, guarantee the long wear life.