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Thread: Porosity, Why?

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  1. #1
    Join Date
    Oct 2007
    Location
    W. KY
    Posts
    28

    Default Porosity, Why?

    I ran out of gas for my mig so I thought it would be a good time to learn some on tig. The photo shows my problem, porosity. The metal was clean of all mill scale, the cuts were with a band saw and there was no oil on it. I thought maybe I had the flow rate to low on the argon, it was at 20 cfm so I upped it to 30 cfm, no help. The tungeston was 2% thoriated, i made sure not to dip it. I did notice that the tip was yellow after I would weld.

    Any ideas? Thanks, Justin
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