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  1. #1
    Join Date
    Oct 2006
    Location
    michigan
    Posts
    7

    Default welding chromolley

    ive never welded chrome i was wondering whats all to it.

  2. #2
    Join Date
    Sep 2005
    Location
    Vernon Ct
    Posts
    117

    Default

    It depends on what type it is, 4140,4130, tubing, plate, thickness. All those factors take effect in the way it gets welded.

    Mike

  3. #3
    Join Date
    Sep 2005
    Posts
    839

    Default

    Long as your set up right its a piece of cake. 70-s-6 is good filler. I used to run s-2. The old timers will tell you to gas weld it, but seems most tig it. I went to a airframe shop last year. 1 guy gas welding a frame, 10 guys tigging parts. That was all 4130. The parts I made all had to be stress relieved-and believe me they needed it.

  4. #4
    Join Date
    Oct 2006
    Location
    michigan
    Posts
    7

    Default thanks for the info

    a freind of mine is wanting me to weld up a snow mobile frame for his race sled i beleive its 4140 i have a miller syncrowave 350 lx what would be the best setting for welding 4140 thanks ryan

  5. #5
    Join Date
    Sep 2005
    Posts
    839

    Default

    What is the wall thickness? I have not welded 4140, I would think for a sled it would be 4130 ? I have a special torch that I used, running under 100 amps,dc, welding .035 up to .o68 wall tube. If you are going to be doing tubing you will probably be notching it, the fit is very critical (shooting for a fit with in .005 at the weld area) and be sure to grind then clean up all the weld area with acetone. Donít quote me my memory sucks, but I believe to stress relieve it you need to bring the area up to 900 degrees with oxy-acct carburizing flame, then allow it to cool at temp over 55 degrees. I think that is pretty close to accurate. You can get a sheet on tig welding it that was put out by lincoln from your local prax air supply if there is one around you, or probably find a down load somewhere.

  6. #6
    Join Date
    Oct 2006
    Posts
    4

    Default

    tigdepot.com/faq.html

    this link will give you some great advise on it
    Last edited by envano; 08-15-2007 at 08:27 AM. Reason: Broken Link

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