40mm High Carbon Low Chrome Hot Rolled Forged Grinding Steel Balls

40mm High Carbon Low Chrome Hot Rolled Forged Grinding Steel Balls. Our Forged Grinding balls produced by advanced automatic rolling machine ( Balls from 20mm-70mm) + Labor Air Hammer ( 80mm-150mm) with special Heating treatment and strict quality control systerm , wh. Raw Material Purchase :Strategic partnership with standard steel enterprise and sign the long term agreement.Purchase directly from Chinese famous standard steel enterprise . We have special department of QC teamwork .The team is responsible for inspection during production , inspection before delivery .