The welding of SFS-365 requires a 100°C pre-heating. As an ingredient a non-blended or an Mn-blended ingredient is to be used. After welding a heat-treatment of 500-650°C is required. Welding of SFS 357 requires a pre-heating of 200-300°C. After welding SFS 357 requires a tension removing and normalization tempering. SFS 356 can be welded by common welding methods. After large-scale welding a tension removing and normalization tempering is required.