For the base materials of 6005A, 6082 and 5083, the selected wire is 5087/ AlMg4.5MnZr, and 5087 wire not only has good crack resistance, excellent porosity resistance, but also good strength performance. For the choice of wire specifications, preferred to choose large diameter specifications of wire. The same welding filling amount is the same weight of wire, the surface area of the large size wire is much smaller than that of the small size wire, therefore, the surface pollution of the small size wire of the large size wire is less that is to say, the oxidation area is smaller, the welding quality is easier to meet the requirements. In addition, large diameter wire feeding process is easier to operate. For the base metal with a thickness of less than 8mm, the welding wire with a diameter of 1.2mm is generally adopted, and for the base metal with a thickness of 8mm and above, the welding wire with a diameter of 1.6mm is adopted. Automatic welding machine USES 1.6mm diameter wire.
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