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Will stainless steel balls rust?

Update:18-02-2021
Summary:

Stainless steel balls are usually produced by forging p […]

Stainless steel balls are usually produced by forging process. At this stage, the commonly used stainless steel balls are 201, 302, 304, 316, 316L, 420, 440C.
  
definition: steel that contains more than 12% chromium and is resistant to chemical substances.
  
 Principle: Stainless steel does not rust, but is not easy to rust. The principle is that by adding chromium elements, a dense chromium oxide layer is formed on the surface of the steel, which can effectively block the re-contact between 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.
  
Classification: China National Standards (CNS), Japanese Industrial Standards (JIS) and American Iron and Steel Institute (AISI) use three digits to indicate different stainless steels, and are widely cited by industry offices, of which 200 series are chromium-nickel-manganese series Austenitic stainless steel, 300 series is chromium-nickel austenitic stainless steel, 400 series chromium stainless steel (commonly known as stainless iron), including martensite and ferrite.