Determination of Weld Strength Factors for the Creep Rupture Strength of Welded Joints

摘要

In this paper general observations on weld creep behaviour of ferritic and martensitic forged, cast and piping steels as well as Ni-based alloys are described. Data of longterm crossweld tests on similar and dissimilar welds with test durations up to 100,000 h are used for a systematic description of weld creep behaviour. Consequences and experience for the determination of weld strength reductions factors based on long term crossweld creep rupture tests are described and procedures for the determination of reliable weld strength reduction factors are proposed.