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CoreyMac wrote:I guess if you found a procedure that (gets you by) then more power to you. But you NEED AC to do a proper weld because one cycle digs and one CLEANS. If you take the cleaning cycle out the weld will be dirty (to say the least) and won't pass any inspections (if needed). If your just sticking 2 pieces of aluminum together fine but I'll stick to AC.
rahtreelimbs wrote:You seemed to have proven your point to yourself. But I have to ask..............can you weld aluminum on AC ??? If so, why not stick to AC ???
bryce39 wrote:Sorry, I had to register to comment on this. Yes, aluminum can be welded with DC and pass whatever tests given all day long! The preferred method is AC because people do not know what they are doing when it comes to aluminum DC plain and simple. If you brush the material with a stainless brush, clean with acetone, machine settings, torch angle, etc the weld will be just as pretty as AC and have deep penetration as well. The sooty layer will be present in the weld but very minimal, just lightly brush it off and you are good to go.