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  • This research was conducted find out the cooling rate, distortion and mechanical properties of MIG welding with Aluminum A5083. The method is Transient Flame Static Tensioning with flame temperature used is 100oC, 200oC and 300oC. The fastest cooling rate found in 100oC. The smallest distortion found in 200oC, 300oC and 100oC respectively. The highest maximum tensile strength in 100oC flame temperature variation is 231,197 Mpa, while in 200oC is 169,658 Mpa and in 300oC flame temperature variation is 156,729 Mpa. The highest hardness of specimen base metal in 200oC flame temperature is 10,8584 kg/mm2, while highest hardness of specimen HAZ in 300oC flame temperature is 15,9812 kg/mm2. Moreover, highest hardness of specimen weld metal in 300oC flame temperature is 12,5805 kg/mm2. 200oC of flame temperature is the ideal temperature for welding.