1.Characteristic: resistance to strong acid, strong alkali, salt and gas of deleterious. Especially resistance to hydrofluoric acid, long life, high hardness, resistance to wear

2.Usage: bearing balls for canner pump, magnetic drive pump. Vacuum pump, fixed anode X-ray tube shaft; bushing bearing for strong acid, strong alkali, salt,  measure pumps, flow meter and deep well pump; bushing bearings for nonmagnetic to hydrofluoric acid.