In this method the welding is GMAW. Where the welding is very suitable for welding thin-shaped materials as well as on the body of the aircraft and ship. In addition, the plate is welded in the form of aluminum, aluminum superiority in addition to strong is one metal that is resistant to corrosion so that the reason why aluminum is widely used in the body of aircraft and ships. In this study the welding process using GMAW 2 layer tack weld method with the material to be joined is aluminum alloy with AA 5083 H116 series with thickness 3 mm. in this welding process the variations in the specified speed are: 8 mm/s, 10 mm/s, and 12 mm/s. while the fixed voltage parameters E = 19 V, and I = 110 A. After the welding process are completed the observations include distortion measurements, measurement of hardness values (Vickers), tensile testing, bending tests and microstructure. Based on the results of tests conducted, showed that the welding specimen with a speed of 12 mm/s has the largest distortion with a value of 11.49 mm. The largest value of ultimate tensile strength was found at 8 mm/s speed variation of 316.9 MPa. The highest hardness value was shown at 10 mm/s variation in HAZ and base metal (BM), variation of 8 mm/s weld metal (WM). The maximum bending strength was found in the 8 mm/s velocity specimen with face bending method of 414.51 MPa.