Expert Yogi
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| In general, the pure metal has a high plasticity. When the other alloy elements are added, the single phase solid solution has a good plasticity, such as the iron and nickel alloy can form continuous solid solution, so the plasticity of the alloy is very high when the iron and nickel are at any proportion.Large Size Carbon Steel Rectangular Pipe
However, under the conditions of other elements, the formation of intermetallic compounds insoluble in solid solution or partially dissolved in solid solution makes the plasticity of metal lower, so the plasticity of the alloy is worse than that of pure metal or single phase solid solution.Tubo de tubo soldado de acero inoxidable 304 con longitud personalizada
Iron (Fe): the basic metal element of stainless steel.
Chromium (Cr): it is the main ferrite forming element. The combination of chromium and oxygen can produce corrosion resistant Cr2O3 passivation film. It is one of the basic elements to maintain corrosion resistance of stainless steel. The increase of chromium content can improve the repair ability of the passivation film of steel. The chromium content in the general stainless steel must be above 12%.
Carbon (C) is a strong austenite forming element, which can significantly improve the strength of steel, and carbon has a negative effect on corrosion resistance.
Nickel (Ni): the main austenite forming element can slow down the corrosion of steel and increase grain growth during heating.
Molybdenum (Mo): a carbide forming element, the formed carbide is very stable, which can prevent the grain growth from austenite heating and reduce the overheating sensitivity of the steel. In addition, the molybdenum element can make the passivation film more compact and stronger, thus effectively improving the corrosion resistance of the stainless steel in Cl-.
Niobium and titanium (Nb, Ti) are strong carbide forming elements, which can improve the intergranular corrosion resistance of steels. However, titanium carbide has a negative effect on the surface quality of stainless steel. Therefore, Nb is usually used to improve the performance of stainless steel with higher surface requirements.
Nitrogen (N) is a strong austenite forming element, which can significantly improve the strength of steel. However, the aging cracking of stainless steel has great influence, so the nitrogen content should be strictly controlled in the stainless steel for stamping purposes.
Phosphorus and sulphur (P, S) are harmful elements in stainless steel, which will adversely affect the corrosion resistance and stamping properties of stainless steel.
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The effect of alloying elements in stainless steel composition
