It's not supposed to. But with the spool gun I can mig aluminum. I have a close friend with a syncrowave 250DX that will allow me to run it whenever needed. So it was not a great concern. Most of all the welding I will ever do will be out of steel. This is the first machine on a long list that I have to acquire to open up my metal fab shop. I am planning on opening up more of a metal art type shop. And will do more mild steel and stainless steel so the ability to do aluminum is not so important. As I'll be doing signs, gates, patio furniture, stuff like that. So it will do 99.9% of the jobs I will do. For the other .1% I'll swing in to my buddy's shop and borrow his TIG for aluminum.