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Alu, Back up Material

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  • Alu, Back up Material

    I have 100 pieces that are .200" thick and about 5/8" long to weld up on the edge. Is there a material that alumimum will do stick too or burn up during this process? I will be using my 15A spool gun and a MM251

    Thanks
    Jim

  • #2
    I would use the Dynasty for that job. What joint? I have used some stainless before. That worked out pretty good. I have 4 or 5 blocks of 2x2x3 taht I use for chill blocks on aluminum.

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    • #3
      I too would probably tig those parts. I believe HAWK mentioned carbon is a great backing plate. You might give that a try.

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      • #4
        copper also works well. but dont arc on it or it will erode
        Trailblazer 302g
        coolmate4
        hf-251d-1
        super s-32p
        you can never know enough

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        • #5
          I think a carbon backing plate would work well for you. You can order custom sizes of carbon blocks from ARCAIR . You can call or email and tell them what you are doing. They can make several different sizes to fit your application. I had one made 1/2" thick and 1 foot square. It works well for GTAW. I also use it to back holes in 1/2" steel when filling them in with a MIG torch.

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          • #6
            i found, in one case, that a large piece of uncleaned and well weathered aluminum worked great.

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