Miller Electric

Welding Discussion Forums

Home » Resources » Communities » Welding Discussion Forums
 
Miller Welding Discussion Forums - Powered by vBulletin

Page 1 of 2 12 LastLast
Results 1 to 10 of 11
  1. #1

    Question Tig welding mild steal, weld cracking.

    I just got a Diversion 180. Been doing lots of practice welds in straight lines on 1/8" angle iron cut from bed frames. Im use 2% thoriated 3/32 tungsten, argon set to 15 cfh, 3/32 ER70S-2 filler rod and amps set to the recommended 75 amps on the chart for metal thickness. Welds look uniform and getting penetration but Im getting small cracks riding down the center line of the weld, not along the edges, but directly in the middle running the length of the weld. Does the same thing with 1/16 2% tungsten with all the same settings. If I set to less amps, say 50, it doesn't do it but its under the recommended setting and doesn't get full penetration. How do I prevent the cracking or am I doing/using something wrong?

  2. #2
    Join Date
    Nov 2003
    Posts
    3,210

    Smile

    Quote Originally Posted by WickedWrenches View Post
    I just got a Diversion 180. Been doing lots of practice welds in straight lines on 1/8" angle iron cut from bed frames. Im use 2% thoriated 3/32 tungsten, argon set to 15 cfh, 3/32 ER70S-2 filler rod and amps set to the recommended 75 amps on the chart for metal thickness. Welds look uniform and getting penetration but Im getting small cracks riding down the center line of the weld, not along the edges, but directly in the middle running the length of the weld. Does the same thing with 1/16 2% tungsten with all the same settings. If I set to less amps, say 50, it doesn't do it but its under the recommended setting and doesn't get full penetration. How do I prevent the cracking or am I doing/using something wrong?
    Bed frames are VERY high carbon content and are crap to weld...

    and will be prone to cracking... just like some tool steels..

    try some other metal... bet you get better results...

    BTW... you don't want to use Thoriated with an inverter like the Diversion...

    you will be happier with some 2% LANTHANATED...

    Here is a Tungsten Guidebook you might find informative...

    http://www.diamondground.com/TungstenGuidebook2013.pdf
    Last edited by H80N; 07-17-2014 at 07:00 PM.
    .

    *******************************************
    The more you know, The better you know, How little you know......

    “The bitterness of poor quality remains long after the sweetness of low price is forgotten”

    Buy the best tools you can afford.. Learn to use them to the best of your ability.. and take care of them...

    My Blue Stuff:
    Dynasty 350DX Tigrunner
    Dynasty 200DX
    Millermatic 350P w/25ft Alumapro & 30A
    Millermatic 200

    TONS of Non-Blue Equip, plus CNC Mill, Lathes & a Plasmacam..

  3. #3

    Default

    Thank you for your input, Ill grab new tungsten tomorrow and some different steel.

  4. #4
    Join Date
    Feb 2012
    Location
    Wa
    Posts
    577

    Default

    Is the material painted?

  5. #5

    Default

    Quote Originally Posted by Cgotto6 View Post
    Is the material painted?
    Was painted, I stripped it of all paint to bare metal with a wire wheel and wiped it clean with acetone.

  6. #6
    Join Date
    Feb 2012
    Location
    Wa
    Posts
    577

    Default

    You probably need to do more than just wire wheel. Actually flap disk or grind to fresh metal. Then hit it with a-tone.

  7. #7

    Default

    I just ran a bead on a different piece of steel and again on the bed frame steel. Only the bed frame steel cracked, and the other did not under the same settings. Now I know not to use angle iron from a bed frame for anything do to structural concerns for any home projects. Something new I learned today..Thanks!

  8. #8
    Join Date
    Nov 2006
    Location
    Lake of the Ozarks MO
    Posts
    3,583

    Default

    You can use it all you want. Just don't expect it to weld good.
    Plenty of things made out of bed frames that do just fine.

    www.facebook.com/outbackaluminumwelding
    Miller Dynasty 700...OH YEA BABY!!
    MM 350P...PULSE SPRAYIN' MONSTER
    Miller Dynasty 280 with AC independent expansion card
    Miller Dynasty 200 DX "Blue Lightning"

    Miller Bobcat 225 NT (what I began my present Biz with!)
    Miller 30-A Spoolgun
    Miller WC-115-A
    Miller Spectrum 300
    Miller 225 Thunderbolt (my first machine bought new 1980)
    Miller Digital Elite Titanium 9400

  9. #9
    Join Date
    Nov 2003
    Posts
    3,210

    Thumbs up

    Quote Originally Posted by FusionKing View Post
    You can use it all you want. Just don't expect it to weld good.
    Plenty of things made out of bed frames that do just fine.
    +1......

    You do not want it in critical structural places...

    it is spring tempered because of the bouncing nature of bed frames...

    So the metallurgy gets all goofed up along the HAZ when heated and welded...

    This is why you often see cutting tools or spring steels joined by brazing or silver solder.. that require much lower temps..
    Last edited by H80N; 07-18-2014 at 08:07 AM.
    .

    *******************************************
    The more you know, The better you know, How little you know......

    “The bitterness of poor quality remains long after the sweetness of low price is forgotten”

    Buy the best tools you can afford.. Learn to use them to the best of your ability.. and take care of them...

    My Blue Stuff:
    Dynasty 350DX Tigrunner
    Dynasty 200DX
    Millermatic 350P w/25ft Alumapro & 30A
    Millermatic 200

    TONS of Non-Blue Equip, plus CNC Mill, Lathes & a Plasmacam..

  10. #10
    Join Date
    Sep 2005
    Location
    Houston, TX
    Posts
    900

    Default

    Quote Originally Posted by FusionKing View Post
    You can use it all you want. Just don't expect it to weld good.
    Plenty of things made out of bed frames that do just fine.
    I have lost count of all the welder carts and other items I have made from bed frames. Not easy to weld or cut, but works fine, and often the existing holes are functional.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Warning: Function split() is deprecated in /mnt/stor3-wc1-dfw1/357822/357839/www.millerwelds.com/web/content/lib/footer.inc.php on line 82

Welding Projects

Special Offers: See the latest Miller deals and promotions.