Labels, Gaskets, and Chloride Cracking of Austenitic Stainless Steels
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The fact that many austenitic stainless steels are susceptible to chloride-induced stress corrosion cracking (SCC) is well documented and reasonably well known. The typical text book description will state that SCC is caused by synergistic effects among the material, the applied and residual tensile stresses, and the environment surrounding the steel. The susceptibility of austenitic stainless steels to chloride-induced SCC is dependent on the nickel content and metallurgical condition of the alloy. Unfortunately, the most common austenitic stainless steels are the 300 series steels and the most common 300 series steels include 304, 304L, 316, 316L, 321, and 347 steels, which have a nickel content (7–10%) that makes them very susceptible to chloride-induced SCC. Because of this susceptibility, the selection and qualification processes for austenitic stainless steels for industrial applications frequently include the evaluation and testing of coupons exposed to the...