Classification of stainless steel plate
According to the manufacturing method, there are two kinds of Classification of stainless steel plate hot rolling and cold rolling, including thin plates with thickness of 0.5-4 mm and thick plates with thickness of 4.5-35 mm.
According to the microstructure characteristics of steel grades, it can be divided into five types: austenite type, austenite-ferrite type, ferrite type, Martensite type and precipitate hardening type.
Requirements can withstand oxalic acid, sulfuric acid-ferric sulfate, nitric acid, nitric acid-hydrofluoric acid, sulfuric acid-copper sulfate, phosphoric acid, formic acid, acetic acid and other acids corrosion, widely used in chemical industry, food, medicine, paper making, petroleum, atomic energy and other industries, as well as construction, kitchenware, tableware, vehicles, household appliances and various parts.
In order to ensure that all kinds of stainless steel plate yield strength, tensile strength, elongation and hardness of mechanical properties meet the requirements, steel plate before delivery must undergo annealing, solution treatment, aging treatment and other heat treatment.
Stainless steel plate surface smooth, high plasticity, toughness and mechanical strength, acid, alkaline gas, solution and other media corrosion. It is an alloy steel that is resistant to rust, but not absolutely resistant to rust.
The corrosion resistance of stainless steel mainly depends on its alloy composition (chromium, nickel, titanium, silicon, aluminum, etc.) and internal organizational structure, the main role is chromium element. Chromium has high chemical stability, forming a passivation film on the surface of the steel, isolating the metal from the outside world, protecting the steel from oxidation and increasing the corrosion resistance of the steel. The corrosion resistance of the passivation film decreases when it is damaged.
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