September 22, 2017 By CoffyAMP
420 Stainless Steel BallsApplied Area：420 stainless steel ball is used in the industries of high precision and antirust: motorcycle fittings, chain wheel, stainless steel bearings, plastic bearings, craftworks, valve, petroleum facilities and so on.
Speciality：It is also called stainless iron, it is magnetic and has good antirust capability. The HRC is 50-55.