Welds in safety critical applications are subject to structural integrity assessments where residual stress plays a key part. Because residual stress predictions are unreliable, experimental measurements such as neutron diffraction and deep hole drilling (DHD) are essential. We will measure the residual stress profile in a P92 steel pipe welded using a superalloy. This task is a part of the SUPERGEN consortium that aims to improve the efficiency of power plants. Neutron diffraction has been used for residual stress measurements in simple welds, but dissimilar welds present a challenge due to their complex microstructure. This proposal is a continuation of the work completed in Experiment Number RB1110272 where we measured residual stress in the as welded condition. In this work we propose to measure the residual stresses in the post welded heat treatment condition.