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Thread: Mig Gas ??

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  1. #1

    Default Mig Gas ??

    Just a quick question,my lease ran out on my C25 tank,can I use straight argon to weld mild steel??
    Did a little practice with 100% argon,results were not great.

  2. #2

    Default

    Can you? Yes. Should you? No.

    If you have to to get something fixed then be aware that the penetration will be lower so you will have to up the volts to compensate. Wetting of the toes will be poor so make sure the metal is very clean before welding, CO2 helps with cleaning and penetration.
    Ron

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  3. #3

    Default

    BTW, purchase you cylinders it will be cheaper in the long run, well not so long run you usually hit the cost of a cylinders during the 3rd year of a lease.
    Ron

    ShopFloorTalk

    Millermatic 350P, Roughneck 4012 and Ironmate guns
    Dynasty 300DX, Coolmate 3, Crafter CS-310 Torch
    Trailblazer 302, 12RC, WC-24
    30A spoolgun
    Spectrum 2050

    Thermal Arc Plasma Welder PS-3000/WC-100B

  4. #4
    Join Date
    Jun 2006
    Location
    Killingworth,Ct.
    Posts
    372

    Default Ron

    Quote Originally Posted by shadetreewelder View Post
    BTW, purchase you cylinders it will be cheaper in the long run, well not so long run you usually hit the cost of a cylinders during the 3rd year of a lease.
    Not in Ct. Biggest you can buy is the 80!!!!!!!!,Jack

  5. #5

    Default

    Thanks a bunch Shade Tree,
    I was just in a hurry to weld up some basement jacks after cutting to fit and didn't clean very good just needed to tack the plates on so no need for a preety weld,I just thought 100% would work as well as c25.I have a syncro 250 and small mig was hoping to get by with 100%


    Thanks Again

  6. #6
    Join Date
    Mar 2007
    Posts
    356

    Default

    100% ar makes a big ulgy mess

    if you have a syncrowave why dont you just stick it, that is what i do when i run out of gas and dont want to fill the bottle right then
    mm210
    maxstar 150

  7. #7
    Join Date
    Dec 2007
    Location
    Oklahoma
    Posts
    705

    Default Mig gas

    Quote Originally Posted by phaxtris View Post
    100% ar makes a big ulgy mess

    if you have a syncrowave why dont you just stick it, that is what i do when i run out of gas and dont want to fill the bottle right then
    There was a good article in "Practical Welding " (I think that was the right mag) last month explaining the characteristics of GMAW with 100% argon,
    90/10(10% co2), and 75/25 on mild steel.
    If I remember correctly, the article said 100% would result in a narrow,rope like bead with low penetration and poor wetting on the edges.
    90/10 was similar and 75/25 was recommended.
    The article could be found in their archives.

    HTH
    Roger

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