Definition of stainless steel: steel that contains more than 12.5% chromium and has a high resistance to corrosion by chemical substances (acid, alkali, salt).Principle: Stainless steel does not rust, but is not easy to rust. The principle is that by the addition of chromium elements, a dense chromium oxide layer is formed on the surface of the steel, which can effectively block the re-contact of the steel and the air, so that the oxygen in the air cannot enter the steel, thereby preventing the production of the steel. The effect of rust. With a wide range, good quality 440c stainless steel balls, reasonable prices, and good service, we will be your best business partner. Best stainless steel balls for sale, we welcome new and old customers from all walks of life to contact us for future business relationships and achieving mutual success!