It is required to withstand the corrosion of various acids such as oxalic acid, sulfuric acid-iron sulfate, nitric acid, nitric acid-hydrofluoric acid, sulfuric acid-copper sulfate, phosphoric acid, formic acid, acetic acid and other acids. It is widely used in chemical industry, food, medicine, papermaking, petroleum, atomic energy, etc. Industry, as well as various parts and components for construction, kitchen utensils, tableware, vehicles, and household appliances. In order to ensure that the mechanical properties such as yield strength, tensile strength, elongation and hardness of various stainless steel plates meet the requirements, steel plates must undergo heat treatments such as annealing, solution treatment, and aging treatment before delivery.