Failure occurred in a Type 316 stainless steel valve seat ring after nine months' service in a water treating system. Visual examination showed the ring had suffered intergranular corrosion after exposure to dilute sulfuric acid. The ring also had a high degree of flexibility.

It is believed that the casting was not given the normal homogenizing heat treatment required to properly diffuse the alloying elements throughout the casting. 7.2

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Copyright 1959 by the National Association of Corrosion Engineers.
1959
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