420 stainless steel ball has the hardness of 51-52 degrees, magnetic and certain corrosion resistance and toughness. 420 stainless steel has the certain wear resistance, certain corrosion resistance and high hardness. Its price is a lower category of stainless steel balls and it’s suitable for the working environment of general requirements. 420 stainless steel is suitable for all types of precision machinery, bearings, electrical, equipment, instruments, transportation, household appliances and so on. 420 stainless steel ball is usually used for the industries of demanding precision and anti-rust performance: motorcycle accessories, pulleys, stainless steel bearings, plastic bearings, handicrafts, valves and so on.