... ISO9001 certificate 5.Plenty of stock Compared with steel ball, Al2O3 ball has following advantages:1. 50% lighter than steel ... than steel6. No metal contamination7. Non-magnetic8. Electric isolation.Application:Al2O3 ball is anti-wear, heat-resistant, anti- oxidant, and ... size could be supplied3. Fracture toughness is relatively lower4. Al2O3 ball is not suitable for application in HCI acid, HF ...