AMS 5640, ASTM A 314, ASTM A 320, ASTM A 582.
Used almost exclusively for parts requiring machining, grinding, or polishing where good corrosion resistance is also required, Its non-seizing and non-galling properties make it ideal for moving parts. Being austenitic steel, it is useful where low magnetic permeability is desired.
Type 303 has considerably better machining characteristics than the other chromium-nickel grades. It has machinability rating of approximately 78% with 1212 rated 100%. Surface cutting speed on automatic screw machines is approximately 130 feet per minute.
This grade has only fair welding properties.