Stainless steel sheet has high strength and hardness and good plastic toughness. It is divided into two types according to the method of hot rolling and cold rolling.
According to the production method, it is divided into two types of hot rolling and cold rolling, including thin plates with thickness of 0.5-4 mm and thick plates of 4.5-35 mm.
According to the structural characteristics of steel grades, it is divided into five categories: austenite type, austenite-ferrite type, ferrite type, martensite type, precipitation hardening type.
It is required to withstand the corrosion of various acids such as oxalic acid, sulfuric acid-ferric sulfate, nitric acid, nitric acid-hydrofluoric acid, sulfuric acid-copper sulfate, phosphoric acid, formic acid, acetic acid, etc., widely used in chemical, food, pharmaceutical, paper, petroleum, atomic energy, etc. Industry, as well as various parts of construction, kitchen utensils, tableware, vehicles, household appliances.
In order to ensure that the mechanical properties such as yield strength, tensile strength, elongation and hardness of all kinds of stainless steel plates meet the requirements, the steel plates must be subjected to heat treatment such as annealing, solution treatment and aging treatment before delivery.
The stainless steel plate has a smooth surface, high plasticity, toughness and mechanical strength, and is resistant to corrosion by acids, alkaline gases, solutions and other media. It is an alloy steel that is not easily rusted, but it is not absolutely rust-free.
The corrosion resistance of stainless steel mainly depends on its alloy composition (chromium, nickel, titanium, silicon, aluminum, etc.) and the internal structure, and the main role is chromium. Chromium has high chemical stability and can form a passivation film on the steel surface to isolate the metal from the outside, protect the steel plate from oxidation, and increase the corrosion resistance of the steel plate. After the passivation film is destroyed, the corrosion resistance is lowered.