Stainless steel is a ferrous alloy containing chromium, which provides a protective layer against staining and corrosion. It is highly corrosion resistant and wear resistant, provides excellent mechanical ability and well known for its aesthetic appearance. It performs well in liquid environments and provides heat resistance at high temperatures. There are numerous types of stainless steel and each contains a different chemical composition. The composition affects mechanical properties and determines whether the material can be further strengthened through heat treatment.