Posted by unc on June 15, 2018 at 18:37:48 from (184.151.222.122):
In Reply to: OT Aluminum Welding posted by avant 1735 on June 15, 2018 at 17:29:13:
As the previous posters have noted, TIG and MIG are the preferred processes for welding aluminum. HOWEVER, sometimes one gets in a spot where you have to use what you have. If stick aluminum electrodes are all that are available, use DC reverse polarity (electrode positive), and here is the trick- use your torch to preheat the joints a little bit. They don't have to be melting hot, but some preheat helps. You will probably find that aluminum will require a little more heat than the same thickness of steel. Practice on some scrap, and cross your fingers.
Does your local high school or vocational college have a welding shop? This sounds like a good project for students. unc
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