Stainless steel plate is generally a general term for stainless steel plate and acid-resistant steel plate. In the beginning of this century, the development of stainless steel plates laid an important material and technical foundation for the development of modern industry and technological progress. There are many kinds of stainless steel plates and different performances. It has gradually formed several categories during the development process. According to the organizational structure, it is divided into four categories: austenitic stainless steel plate, martensitic stainless steel plate (including precipitation hardening stainless steel plate), ferritic stainless steel plate, and austenitic plus ferritic duplex stainless steel plate. The main chemical composition or some characteristic elements in the steel plate are classified into chromium stainless steel plate, chromium nickel stainless steel plate, chromium nickel molybdenum stainless steel plate, low carbon stainless steel plate, high molybdenum stainless steel plate, high purity stainless steel plate, etc. According to the performance characteristics and uses of steel plates, it is divided into nitric acid resistant stainless steel plates, sulfuric acid resistant stainless steel plates, pitting corrosion resistant stainless steel plates, stress corrosion resistant stainless steel plates, high strength stainless steel plates, etc. According to the functional characteristics of steel plates, it is divided into low temperature stainless steel plates, non-magnetic stainless steel plates, free-cutting stainless steel plates, superplastic stainless steel plates, etc.