Casting Iron Steel Ball Mill Grinding Ball by Shandong .
ItemProductSurface hardnessCore hardness 1High chrome cast grinding media Hrc 5865More than hrc 55 2Low chrome cast grinding media Hrc 4855More than hrc 46 3Medium chrome cast grinding medirc 5060More than hrc 48 4B2 forged grinding medirc 5865More than hrc 55 ...