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  1. #1
    Elite Member Shield Arc's Avatar
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    Default Copper Tig welding.

    This subject comes up every once in awhile, and I've never seen it done. So I thought I'd give it a try. Took four hundred forevers to get the filler rod from weldingsupply.com! Back ordered, and all.
    Started on some 1/8" x 1" flatbar. Did some corner joints, lap joint, and a fillet weld. Used 3/32-inch Ceriated tungsten, at 150-amps, with 100 % pure argon. Took a little bit to get enough heat built up to form a puddle. But didn't take to long until I was backing out of the pedal. In some ways it reminds me of welding aluminum, except the puddle looks dirty. I used a brand new steel wire wheel on a 4-inch hand grinder to clean the base metal before welding. After welding I tried a new Scotch-Brite pad, but wasn't very successful, so I used a new stainless steel hand brush. I learned if I let everything cool to the touch, the black cleaned off easier. Soon as I lifted my hood after welding, every piece was glowing red hot!
    I tried a couple welds on 1/4-inch material, it took all 300-amps to weld the 1/4-inch!
    Kind of fun to do, learned something new today!
    Attached Thumbnails Attached Thumbnails Copper Tig welding.-c-corner-black.jpg   Copper Tig welding.-c-corner-brush2.jpg   Copper Tig welding.-c-fillet.jpg   Copper Tig welding.-c-lap.jpg   Copper Tig welding.-cid.jpg  



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  2. #2
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    Default Re: Copper Tig welding.

    Nice looking welds...now go get a job maintaining the Statue of Liberty.

    I have enough issues with aluminum although have produced some nice looking welds on it. I'll bet that copper plate was costly!

  3. #3
    Gold Member flyerdan's Avatar
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    Default Re: Copper Tig welding.

    Just out of curiosity, do you think that you could use the solid wire out of Romex for a small job or one time use if the need ever arose?
    Anxiously awaiting Dr. Savage's return to the airwaves.

  4. #4
    Elite Member Shield Arc's Avatar
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    Default Re: Copper Tig welding.

    Quote Originally Posted by sdkubota View Post
    now go get a job maintaining the Statue of Liberty. I'll bet that copper plate was costly!
    JOB?! That's the last thing I want. That flatbar was $8.00 a foot.





    Quote Originally Posted by flyerdan View Post
    Just out of curiosity, do you think that you could use the solid wire out of Romex for a small job or one time use if the need ever arose?
    I've read on some welding forums where people have had good success with like 12-GA Romex wire.


    Miller Dynasty 300.
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    Lincoln LN-25.
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    Everlast PowerArc 200.
    5 Lincoln SA-200s.
    1800 Ellis saw
    Hypertherm Powermax 1250, CNC table.
    PROFAX Welding Positioner.
    JD2 model 3

  5. #5
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    Default

    Quote Originally Posted by Shield Arc View Post
    JOB?! That's the last thing I want. That flatbar was $8.00 a foot.

    I've read on some welding forums where people have had good success with like 12-GA Romex wire.
    Shield you desribed it perfect bud, very similar to aluminum. Heres my filler wire, works perfect and blends and polishes great!

    Copper Tig welding.-forumrunner_20130212_182017.png



    Copper Tig welding.-forumrunner_20130212_182056.png

  6. #6
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    Default Re: Copper Tig welding.

    If it took 150 amps for 1/8in and 300amps for 1/4, does than mean I can do 1/16 with 75amps. Yes this is a real question.

  7. #7
    Elite Member Shield Arc's Avatar
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    Default Re: Copper Tig welding.

    Sounds reasonable to me. But I would think copper is a bigger heat sink than aluminum, so the bigger the item being welded the more heat you'll need.


    Miller Dynasty 300.
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    Lincoln LN-25.
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    Everlast PowerArc 200.
    5 Lincoln SA-200s.
    1800 Ellis saw
    Hypertherm Powermax 1250, CNC table.
    PROFAX Welding Positioner.
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  8. #8
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    Default

    That thin 28 gauge I just showed was welded if I remember correct at 90amps. Yowza, it was paper!

  9. #9
    Veteran Member magicheater's Avatar
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    Default Re: Copper Tig welding.

    Did you have it clamped in that huge heat sink vise when you welded it? or maybe I am not understanding something correctly.
    Working to increase the scope of the small tractor experience, one quick attach at a time.

  10. #10
    Elite Member Shield Arc's Avatar
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    Default Re: Copper Tig welding.

    Quote Originally Posted by magicheater View Post
    Did you have it clamped in that huge heat sink vise when you welded it? or maybe I am not understanding something correctly.
    No I didn't, but I only have two hands. One to hold the Tig torch, the other to hold the filler rod. So the vice comes in real handy to hold things for me.


    Miller Dynasty 300.
    Lincoln V350-Pro w/pulse
    LF-72
    Lincoln SG Spool gun

    Lincoln LN-25.
    1937 IdealArc-300
    Everlast PowerArc 200.
    5 Lincoln SA-200s.
    1800 Ellis saw
    Hypertherm Powermax 1250, CNC table.
    PROFAX Welding Positioner.
    JD2 model 3

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