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What are the classifications of stainless steel?

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Stainless steel classification There are five basic types of stainless steel: austenite, ferrite, martensite, duplex stainless steel, and precipitation hardening stainless steel.
(1) Austenitic stainless steel is not magnetic. The typical steel type is the addition of 18% chromium and a certain amount of nickel to increase corrosion resistance. They are widely used steel types.
(2) Ferrite is magnetic, and chromium is its main content, with a proportion of 17%. This material has good oxidation resistance.


(3) Martensitic stainless steels also have magnetic properties. The content of chromium is usually 13% and contains a proper amount of carbon. They can be hardened by quenching and tempering.
(4) Duplex stainless steel has a mixed structure of ferrite and austenite, the content of chromium is between 18% and 28%, and the content of nickel is between 4.5% and 8%. They are very resistant to chloride erosion. Good results.
(5) Precipitated stainless steel has a conventional chromium content of 17, plus a certain amount of nickel, copper and niobium, which can be hardened by precipitation and aging.

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