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TIG welding aluminum allows you to control adding the filler metal establishing the weld puddle and ensuring proper penetration before adding the filler metal. Alternating Current TIG AC Aluminum TIG welding will require alternating current or AC in which the machine is constantly reversing between positive and negative currents. Lower end machines usually dont have this feature.
This added strength is directly related to the level of control that is attainable with TIG welding.
TIG welding aluminum allows you to control adding the filler metal establishing the weld puddle and ensuring proper penetration before adding the filler metal. Tungsten inert gas tig welding also known as gas tungsten arc welding gtaw is best suited for welding aluminum and stainless steel. But that said not every TIG welder can properly weld aluminum. Aluminum is very conductive and a lot of heat is required to establish the weld puddle.