Stainless steel is normally referred as non-rusting steel. In metallurgy, it is a type of steel which has at least 10.5 % of chromium content in it. It does not normally corrode, rust or stain with water as ordinary steel does but it does not mean that it is fully stain proof. It is vulnerable to environments having low oxygen and high salinity. Most commonly, stainless steel is used in application in which both properties of steel and resistance to corrosion are required.