The research uses an experimental method which includes the welding process, which varies the seam distance and the current at the time of welding, then a tensile test is carried out. The variation of the seam distance used is 2 mm and 3 mm and also the current that is varied is 70, 80, 90 amperes. The welding process was carried out on ST 40 steel. There were 6 specimens made, including 3 spec…