"When welding steel structures, a certain workpiece temperature is necessary, which must be achieved by preheating. One reason for this may be to maintain the deformability of the material in the area of the welded connection. The information sheet takes this goal into account when determining the workpiece temperature. Only the steel St 52 according to DIN 17100 is taken into account, not the steel St 37, because welding does not significantly affect its deformability."