Classification of stainless steel

Stainless steel is divided into martensitic stainless steel, ferritic stainless steel, duplex stainless steel, austenitic stainless steel, precipitation hardening stainless steel. 1, martensitic stainless steel: through heat treatment can adjust the mechanical properties of stainless steel, is a kind of stainless steel can be hardened. The typical brand is Cr13. Mainly used for steam turbine blades, tableware, surgical instruments.

1, martensitic stainless steel: through heat treatment can adjust the mechanical properties of stainless steel, is a kind of stainless steel can be hardened. The typical brand is Cr13. Mainly used for steam turbine blades, tableware, surgical instruments.

2, ferritic stainless steel: chromium content in 15%~30%, with body centered cubic crystal structure. This kind of steel generally does not contain nickel, has the characteristics of high thermal conductivity, small expansion coefficient, good oxidation resistance, excellent stress corrosion resistance and so on, and is mostly used in the manufacture of parts resistant to atmospheric, water vapor, water and oxidation acid corrosion.

3, duplex stainless steel: ferrite and austenite account for about 50%, generally less content also need to reach at least 30% stainless steel.

4, austenitic stainless steel: austenitic stainless steel, refers to the stainless steel with austenitic structure at room temperature. Austenitic stainless steel is non-magnetic and has high toughness and plasticity, but the strength is low, it can not be strengthened by phase transformation, only by cold working.

5, precipitation hardening stainless steel: refers to the stainless steel chemical composition on the basis of adding different type and quantity of reinforcement element, the precipitation hardening process of different type and amount of carbide, nitride, carbon nitride and intermetallic compound, can not only improve the strength of the steel and keep sufficient toughness of high strength stainless steel, hereinafter referred to as PH steel.