In 18% Cr steel by adding 8 ~ 11% Ni, is the austenitic stainless steel. Such as 1Cr18Ni9 is the most typical steel. This type of steel due to the addition of nickel, the expansion of the austenitic region, which can be metastable at room temperature single-phase austenite.
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Because it contains higher chromium and nickel, and showed a single-phase austenite, which has higher than the chromium stainless steel chemical stability, better corrosion resistance, is the most widely used class of stainless steel.
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18-8 stainless steel in the annealed state of austenite + carbide of the organization, the presence of carbide, corrosion resistance of steel have great damage, it is usually a solution treatment method, that is, the steel heated to 1100 ℃ After cooling, the carbide dissolved in the high temperature obtained in the austenite, and then by fast cooling, at room temperature to obtain single-phase austenite.
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Commonly known as the stainless steel iron means ferritic stainless steel and martensitic stainless steel. The most common austenitic stainless steel, which is distinguished from the most commonly used anti-rust properties.
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