Stainless steel is resistant to corrosion by acidic and alkaline media. It is an alloy steel that is not easy to rust. The commonly used grades in automation equipment are SUS303 and SUS304. 303 has good cutting properties and can be used as part material. 304 has poor machinability and is often used as sheet metal parts. Common mechanical parts include：gear, cam, pulley，bearing, axis, screw, nut, bolt, spring.
