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Abstract

Cracks was found in type 347 stainless steel internal attachment welds of a reactor for a high temperature, and high pressure hydrogen service. One of the possible causes of cracking is low cycle fatigue cracking induced by repetition of thermal stress to embrittled weld metal. Type 347 weld metal loses its ductility by presence of sigma phase and hydrogen.

References

C.H. Samans, Corrosion. 20 (1984) 265.

J. Watanabe et. al., Presented at The International Joint Pressure Vessels & Piping and Petroleum Mechanical Engineering Conference, Mexico City (1976) 19-24.

C.T. Sawyer, Information Distributed to all Refining Managers in the United States and Canada, In-Service Embrittlement of Low-Alloy Chrome-Moly Steel, API, Division of Refining, 1974.

J. Watanabe et. al, Presented at NACE Conference Corrosion/76, Houston, Texas, March 22-26 (1996).

Pressure Vessel Research Committee, Long Range Plan for Pressure Vessel Research-Fourth Edition, WRC Bulletin No. 209 (1975) p. 6

Y. Yoshino, J. Watanabe and R. Chiba, Presented at International Conference on the Effect of Hydrogen Behavior of Materials, Jackson, Wyoming, 1975.

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