dear expert, I want to weld sheet metal parts one is 1.2mm thick and the other is 8mm mild steel by the MIG process. please check the jpeg. the problem I am facing Is leakage between the flange and weld beads and also from the start & end points on the weld. after welding the is checked under 3bar air pressure. kindly advice how I achieved a leakage-free weld.

regards

asif