2001DVS 2902-2-2001 Resistance spot welding of steels with individual thicknesses of up to 3 mm - Spot weldability
1990DVS 2902-2-1990 Resistance spot welding of steel up to 3 mm thick; suitable for spot welding
1977DVS 2902-2-1977 Resistance spot welding of steels of an individual thickness of up to 3 mm; spot welding characteristics of unalloyed and low-alloy steels (alloy content <= 5%)