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This report addresses the problems of dissimilar metal welds connecting an austenitic stainless steel component to a ferritic steel component. In LMFBRs such welds appear at the junction of the austenitic stainless steel vessel with the ferritic steel roof, in sodium loops and in water or steam pipes. The latter are exposed to high temperatures in the creep range. A wide range of austenitic stainless steels and ferritic steels are covered and more than twenty different weld metals are studied. The materials, geometries and welding procedures treated in the study are presented, followed by a review of service experience from examinations of dissimilar metal welds after elevated temperature service, in particular failed welds. Results of laboratory tests performed for reproducing service failures are then discussed. A further section is devoted to a review of test results on fatigue behaviour and impact toughness for dissimilar metal welded joints when creep is not significant. Finally, the problem of residual life assessment is addressed. The recommendations presented concern the material selection, welding procedure, life prediction and testing of dissimilar metal welds.

Additional information

Authors: ESCARAVAGE C, Novatome, Lyon (FR)
Bibliographic Reference: EUR 13083 EN (1990) 45 pp., FS, ECU 5
Availability: (2)
ISBN: ISBN 92-826-1895-1
Record Number: 199011848 / Last updated on: 1994-12-02
Original language: en
Available languages: en
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