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I have heard 0.50 and thicker aluminum can be welded with dc tig and 100% helium sheilding gas. Have also heard of success stories, but have never seen actual results. Is this a valid process? Is so, can you suggest heat settings and flow rates?
I can be done, but you need to clean the oxide off of the surface, and I think that should be done chemically. If you have an AWS book the specs are in there and if you need, e mail me and I will send you the parameters to do it.
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