Recent update of the IIW-recommendations for fatigue assessment of welded joints and components

The IIW-Recommendations for Fatigue Design of Welded Components and Structures is an international guideline that contains all relevant information to design welded structures under cyclic loading. Within the recommendations, all relevant assessment approaches, i.e., nominal, structural and notch stresses as well as fracture mechanics, are included. In addition, the relevant infu-ences are covered, such as the effect of post-weld treatment, mean resp. residual stresses and wall thickness. In the current update, the structure is enhanced and straightened and with it the applicability is improved. As completely new content, the assessment of welded thin joints with the notch stress approach and the impact of post-weld treatment procedures on the endurable stresses and the slope of the S-N curve is added. It is expected that the new update will have the same impact on design and other codes as the old one.