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Definition of stainless steel

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2022-08-12 09:45

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Stainless steel, in simple terms: stainless steel is not steel that does not rust, but steel that is not easy to rust. In 1910, it was found that adding 12% chromium Cr to ordinary carbon steel has the characteristics of corrosion resistance and oxidation resistance. Therefore, in the general definition, only 12% chromium Cr can be called stainless steel.
According to the national standard GB20878-2007 stainless steel and heat-resistant steel grades and chemical composition of the clear definition: stainless steel, with the characteristics of stainless steel, corrosion resistance, chromium Cr content at least 10.5%, and the maximum carbon content should not exceed 1.2%.
However, according to the recent national standard GB20878-2007 stainless steel and heat-resistant steel grades and chemical composition of the clear definition: stainless steel, with the characteristics of stainless steel, corrosion resistance, chromium Cr content at least 10.5%, and the maximum carbon content should not exceed 1.2%.

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