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  1. #11
    Join Date
    Jul 2007
    Posts
    11

    Default

    Awesome, thnx for tips, I will run then 20 to 25cfh.
    I go try to buy the gas tank today, getting a biggest one, getting 244cf of argon. at about 25 cfh it should give about 10hrs of work, is that true or it uses a lot more. Will try to get the filler rods if the store has them, otherwise I order online. The accessory kit that came with the welder had yellow/gold tungsten. ether a thoriated at 1% and radioactive or lathaneded at 1.5%. I might just buy some premium tungsten. I also have a gray one, and a red one but they are 1/8.

    I might get the gas lens, To waste less gas if its a non expensive thing. If its over 30 buks, then probably I wont get it.

    I will also get couple of tig gloves, a welder sleves, my friend wants a mask, umm thats preaty much it then. Oh and the part where the tungsteen goes back into the handle, it got broken, so I need it so I wont waste any tungsteen.

    I am kinda on a budget.

    As soon as I will do anything I will post some pics. maybe couple of practice welds, and frame is starting to build up.

  2. #12
    Join Date
    Apr 2007
    Posts
    106

    Default

    Whatever it's worth, I've read that ER70S-2 is recommended for welding 4130.

    Save the -6 for mild steel.

    Good luck with it.

  3. #13
    Join Date
    Jul 2007
    Posts
    11

    Default

    Thank you all for responses, will go to the store tomorrow, today closed.

  4. #14
    Join Date
    Jul 2007
    Posts
    11

    Default

    Got 300cf of argon, ordered er70s2 welding rods, will pick up on wed.

    Soon some pics........

  5. #15
    Join Date
    Aug 2006
    Location
    near rochester NY
    Posts
    9,881

    Default

    cool, looking forward to the pic's.
    thanks for the help
    ......or..........
    hope i helped

    feel free to shoot me an e-mail direct i have time to chat. james@newyorkmetalart.com
    summer is here, plant a tree. if you don't have space or time to plant one sponsor some one else to plant one for you. a tree is an investment in our planet, help it out.
    JAMES

  6. #16

    Default welding 4130 tubing

    hello all,
    preheating or annealing as some call it,it not required on 4130 tubing
    you would have to get the tubing a 1550 degrees,and hold it a that temp
    from anywhere to 30min to 24hrs ,depending on the thickness,and as far
    as what cup to use i use a no.8 for all my tubing,and if you want it to look
    really slick,,,use a gas lense cup

  7. #17
    Join Date
    Dec 2005
    Location
    wisconsin
    Posts
    836

    Default

    Quote Originally Posted by gary gonzales View Post
    hello all,
    preheating or annealing as some call it,it not required on 4130 tubing
    you would have to get the tubing a 1550 degrees,and hold it a that temp
    from anywhere to 30min to 24hrs ,depending on the thickness,and as far
    as what cup to use i use a no.8 for all my tubing,and if you want it to look
    really slick,,,use a gas lense cup

    Gary,
    Preheating is different then a post weld anneal. And yes you need the post weld anneal to do a proper job. Im not going to go into the details of it here but the short version is the untempered Martensite due to the rapid gas quench when tig or mig welding the thin material. Simply warming the joint up to a dull red, and slowly letting it cool takes the Martensite through its critical temperature range without it becoming un-tempered. You wont find this on think sections but its very common on tubing. There have been many reported failures of Tig and Mig welds on 4130 due to this exact cause. What you described is commonly called normalizing, and is different then a full anneal. We in the aircraft industry have had to learn the hard way about this material, its easy to work with, welds beautifully, but must be treated right.
    Have fun!

    -Aaron
    "Better Metalworking Through Research"

    Miller Dynasty 300DX
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  8. #18
    Join Date
    Jul 2007
    Posts
    11

    Default

    been welding the thing up, me and my friends tacked it all together, and now we are welding it all up. we used 1/2 a tank on tacking and practicing welding. I am a master hole wizard. I think I made most holes, and I have filler most holes. Using er70S2 is pretty easy, I tried a bit stronger material and it became harder to weld because it did not flow as easily.

    Anyways, basically non of us know how to weld right, so we are trying our best. Its very easy to make a hole in 4130 1x0.035 tubing even with 1/16 tungsten and welder set to 75amps top.

    After we finish the welding, I take some good pics. For now just some spoilers:

    Me welding:



  9. #19
    Join Date
    Dec 2005
    Location
    wisconsin
    Posts
    836

    Default

    Yep Practice Practice Practice. And while your at it invest in a long sleeve welding jacket. Skin cancer and/or burns isnt fun. Also post weld anneal if its critical.

    -Aaron
    "Better Metalworking Through Research"

    Miller Dynasty 300DX
    Miller Dynasty 200DX
    Miller Spectrum 375 extreme
    Miller Millermatic Passport

    Miller Spot Welder
    Motor-Guard stud welder

    Smith, Meco, Oxweld , Cronatron, Harris, Victor, National, Prest-o-weld, Prest-o-lite, Marquette, Century Aircraft, Craftsman, Goss, Uniweld, Purox, Linde, Eutectic, and Dillon welding torches from 1909 to Present. (58 total)

  10. #20
    Join Date
    Jul 2007
    Posts
    11

    Default

    some more pics, my friend took them:




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