Angular strains in multipass stick electrode welding

In this work, investigations were carried out into the effect of the preparation angle, the heat input in welding, the chemical composition of filler material and the medium temperature on the formation of angular strains in multipass welding with one-sided edge preparation. Conclusions: Angular strains in butt welding joints are determined by the angular deformation after the first balance, the area of the lower half of the edge preparation and the heat input. The angular strains are reduced most efficiently when increasing the heat input. Therefore, welding, with the exception of the root pass, should be carried out with electrodes of a larger diamete but within the heat input limits acceptable for the given steel.