... 65; Si: 0.15-0.37Detailed Product Description1. Forged steel ballsSize: 20mm-150mmHardness: HRC55-65Chemical elements: ... of the biggest and most specialized casting and forged product manufacturers in China. Established in 1995, ... Sell):Steel Ball,Grinding Ball,Forged Steel Ball,Casting Steel Ball,Flange,Grinding Media Ball,Forged Grinding Ball,Casting Grinding Ball,Forging Steel Ball,Steel Flange ...