molten aluminum will react with oxygen in the atmosphere. trying to weld without a inert shielding gas will create a weld full of aluminum oxides and gas porosity. the weld strength will be much lower and the weld will be brittle and can break much easier from shock. the weld can fail with little warning and just snap.Click to see full answer. Just so, can you aluminum weld with a MIG welder? MIG Welding Aluminum Basics Aluminum is a tricky metal to weld with a MIG welder because it takes more heat than mild steel (Usually in the range of 21 to 24 volts). Any thinner than that and you’ll need a TIG welder. With a TIG welder, you can actually weld a soda can together.Also, what kind of welder do I need to weld aluminum? One of the most popular welding processes for aluminum is gas tungsten arc welding (GTAW), otherwise known as tungsten inert gas (TIG) welding. GTAW is a great process for aluminum because it does not require mechanical wire feeding, which can create feedability issues. Likewise, can you use a wire feed welder to weld aluminum? When using a wire welder the problems of aluminum welding increase because aluminum wire is prone to crumple and bend. Proper preparation, therefore, is the key to successful aluminum welding when using a wire welder.How do you set up a MIG welder for aluminum?The settings needed to MIG weld aluminum are pretty much the same for all positions. In most cases it will take 21 to 23 volts to get the arc to spray transfer. If welding out of position you will want the wire feed speed fast enough to keep the weld full of metal at a fast crackle.
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