Classification and application of stainless steels

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1. Definition and characteristics of stainless steel
2. Classification of stainless steel
3. Application of stainless steel
RESUME
1. Definition and characteristics of stainless steel
Stainless steel, as the name suggests, refers to steel with high corrosion resistance. Its main components are iron, chromium, nickel and other alloying elements, the chromium content of which reaches more than 10.5%, due to the formation of a dense chromium oxide film on the surface of the steel, which allows it to withstand the effects of most chemical environments. Stainless steel also has good toughness, strength and plasticity, and can be molded and processed by cold, hot processing and welding.



2. Classification of stainless steel
Stainless steel can be classified in sri lanka number data different ways depending on its organizational structure, chemical composition, and use. Common methods of classifying stainless steel include the following:

a. Classification by organizational structure
1) Ferritic stainless steel: mainly composed of ferrite, has good plasticity and weldability, common models are 304, 316, etc.

2) Austenitic stainless steel: mainly composed of austenite, has high strength and heat resistance, common models are 310, 321, etc.

3) Ferritic-austenitic stainless steel: composed of ferrite and austenite, combines the advantages of both, common models are 2205, 2507, etc.

b. Classification by chemical composition


1) Chromium stainless steel: The main alloying element is chromium, which has good corrosion resistance and is widely used in chemical industry, marine and other fields.