This work is part of a round robin exercise in residual stress standardisation as part of the NET programme. Within the NET programme, multiple simulations of the weld stress are combined with measurement by neutron diffraction (at various sites in Europe), plus destructive methods such as deep hole drilling and the contour method. The purpose of this work is to measure residual stresses in welded stainless steel plates. The aim is to move from the single bead-on-plate that was modeled earlier in the programme, to a three-pass groove weld where there will be the added complexity of cyclic hardening as a result of the deposition of the second and third weld passes. Plates have a simplified geometry compared with real samples, and the choice of a plate geometry is anticipated to aid FE simulation by other colaborators in the programme.