"CSCC"

Question:

"I have ran across your articles regarding Corrosion in Caustic Solutions and Chloride Stress Corrosion Cracking, These artiles are really helpful for me, and I also have a question I hope you or anyone out there can give me suggestions. We are supplying valves for general serves with some chloride (low ppm), I want to use 410 ss for the wet parts of the valve because 410 ss does not contain any nickel, therefore 410 ss is not susceptible to CSCC. The valve design temperature is 350 deg F and 200 psi. Do you think 410ss is a suitable material for this service? If not, what will be?"

Answer:

You are correct in saying that 410SS is chloride stress corrosion cracking (CSCC) resistant. However, depending on the exact environment and operating temperature, chloride levels and the hardness of the 410SS components, 410SS may be susceptible to pitting corrosion and/or hydrogen embrittlement cracking.

 

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