[Jewelry making - Article 00233] - Re: [Orchid] Protective Gas

[jesse Brennan]

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    In my experience as an Engineer in the industrial gas industry with
    the gases and in pursuit of super quality stainless steel Tig
    welding we did not find any real reason to add hydrogen to argon. We
    did try it but found that with good argon and proper pre and post
    weld purging we got no improvement will hydrogen addition. A
    competitor did claim advantages but we found none over our normal
    high quality practice. 

    Welds were examined visually and sectional samples inspected by
    scanning electron microscope at 3500 magnification. I don't believe
    you would see anything different with pulse welds on gold and
    silver. 

jesse

 
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