You do not want to hear a bacon frying sound when mig welding aluminum. When you mig weld steel with "short circuit transfer" the wire actually fuses into the puddle and then arcs back many times a second and makes that bacon frying sound. Fine little droplets of metal "spray" into the weld. There are several aluminum mig welding techniques that work ok, but the one used in the video is just a slow steady motion.įor 1/8" thick aluminum, unless you have the machine set just right, the slow steady bead just builds up too much heat because by the time you reach the edge of the metal, its really too hot and leaves a huge crater.Īnother thing to learn from this video about aluminum mig welding is that it uses what is known as "spray transfer".Ĭan you See the tip of the wire? It never goes into the puddle. You can also notice the cleaning action of the arc around the edges of the weld puddle that breaks up the aluminum oxide and allows the puddle to wet in to the base metal. In this video, you can see that when mig welding aluminum, the weld puddle is pushed and not pulled. Dead nuts straight in works too!.pulling causes soot" Mig Welding Aluminum - How to mig weld aluminum - Aluminum Mig Welding Tipsįor Mig Welding aluminum.You most often need a spool gun. "Just Remember this.Mig Welding Aluminum exaggerates everything that can go wrong migging steel!.
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