Welding preheating and post-welding heat treatment of ASTM A588 Grade C weathering steel plate

ASTM A588 Grade C weathering steel plate preheating before welding. Before welding, preheat the weldment to 350-400, and then weld it. Preheating can reduce the temperature difference between the metal in the weld and the surrounding metal.

After welding, cooling and shrinkage can be uniform at the same time, so as to significantly reduce the ASTM A588 Grade C weathering steel plate welding stress and welding deformation.

Post-welding heat treatment of ASTM A588 Grade C weathering steel plate. Stress relief annealing removes welding stress by heating the workpiece evenly to 600-650, holding it for a certain period of time, and then cooling it slowly.

Overall high temperature tempering has the best effect of ASTM A588 Grade C weathering steel plate eliminating welding stress, which can generally eliminate 80%-90% of the residual stress.