cold rolled stainless steel seamless tubeMany of stainless steel, performance varies, it gradually formed a few categories in the development process. By organization structure min , is divided into horse 's stainless steel ( including precipitation hardening stainless steel ) , and iron pigment body stainless steel , and Olympics 's body stainless steel and Olympics 's body plus iron pigment body double phase stainless steel , four class ; by steel in the of main chemical components or steel in the of some features element to classification , is divided into chromium stainless steel , and chromium nickel stainless steel , and chromium nickel Mo stainless steel and low carbon stainless steel , and high Mo stainless steel , and high pure stainless steel , ; by steel of performance features and uses classification , is divided into resistance nitric acid stainless steel , and resistance sulfate stainless steel , and resistance points corrosion stainless steel , and resistance stress corrosion stainless steel , and high strength stainless steel , ; by steel of function features classification , is divided into low temperature stainless steel , and no magnetic stainless steel , and easy cutting stainless steel , and Super plastic stainless steel , . Currently used, classification is based on characteristics of steel structure and characteristics of the chemical composition of steel as well as combining the two methods of classification. Generally consists of Martensitic stainless steel, stainless steel, austenitic stainless steel, duplex and precipitation hardening stainless steel, etc, or divided into Nickel chromium stainless steel and stainless steel are two major categories.