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The role of nickel in stainless steel

The main role of nickel in stainless steel is that it changes the crystal structure of the steel. Increasing nickel in the stainless steel is a major cause of the formation of austenite crystal structure, such as stainless steel so as to improve the properties of plasticity and toughness, weldability , etc., so called nickel is austenite-forming element.

Crystal structure of the plain carbon steel is called ferrite, body-centered cubic form (BCC) structure, the addition of nickel to promote the transition from the crystal structure of the body-centered cubic structure (BCC) is a face-centered cubic (FCC) structure, carbon seamless steel pipe manufacturer china which is called austenite. However , nickel is not the only element of this nature . Common austenite forming elements are: nickel, carbon, nitrogen , manganese, copper. The relative importance of these elements in terms of austenite crystal structure prediction is formed of stainless steel for significance .

Currently , many people have developed a formula to express the relative importance of austenite -forming elements , most notably the following equation.

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