Welding Aluminum: MIG Spool Gun vs TIG

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1 Comment

  1. David P. Kenney

    May 19, 2017 at 2:48 PM

    Whenever I can, I will select GTAW (tig) with mixed argon and helium (I blend my own according to circumstances ) and avoid excessively high frequency output or pulsing over GMAW (mig) for aluminum work except for either non-critical structures or very heavy work that can be adequately pre-heated a/o heat treated.
    In general, I find aluminum welds performed using mig to be brittle.
    I also find that across the board, people select spooled wire way too light. They end up trying to compensate with excessive wire feed speeds. The fine wire can not carry sufficient amperage and has a higher surface to volume ratio that introduces more contaminants to the puddle and simply is more demanding on the equipment.
    Your thoughts appreciated.
    Thanks for your time.

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