904L stainless steel tube corrosion analysis

Alloy steel 904L stainless steel tube inside and outside the stress corrosion analysis, more than the critical value of the tensile stress (including internal stress) and high temperature at the same time with the conditions, in the metal material cracks in a local corrosion, the appearance of cracks are usually unpredictable. This phenomenon is usually controlled by the correct selection, although changing the environment and reducing the residual stress , sometimes can work. In general, ferritic and 904L stainless steel tube stress corrosion cracking performance is better, and often a substitute. Alloy steel a nickel-chromium alloy in the nickel content of more than 24% corrosion resistance also increased. In fact, the chromium content of 21% -23% nickel with 17% -26% ,alloy steel has a good resistance to stress corrosion cracking performance. But in order to make the austenitic alloy really free from stress corrosion cracking, nickel content must be more than 35%.

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