This paper describes a test campaign initiated by EDF and FRAMATOME on the topic of the Welding Residual Stress consideration within the Fracture Mechanics Assessment of components. For that purpose, pipes mock-ups with a non-post-weld heat-treated weld at its centre part and containing an initial crack are submitted to 4 points bending load tests at low temperature up to failure. The paper describes the material used for this campaign, the Welding Residual Stresses characterisation, and the post-test interpretation of the first test achieved today. Despite a non-expected failure during the test, this first test illustrates the large conservatism of the design approach relying on glob al approach and a consideration of the Welding Residual Stress contribution through an envelope membrane stress throughthickness stress distribution.