Shield Arc
Super Member
Oh I wasn't offended, no way, no how! I'm always amazed at what I don't know about welding. I'm just one step above your average hack.
Can't weld aluminum with DC TIG but can with DC MIG?
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Jorville
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shield arc I have only once saw someone show you disrespect. You can see that on site comments where you go by Puddles. You have done an excellent job helping Lanse with his projects. And all the knowledge you have shared over the internet. You have shown total professionalism on both sites I see your posts on. I would never call you a hack or anything disrespectful. Keep up the good work and have a great day.
Shield Arc
Super Member
I don't remember that at all
! Everyone is entitled to their opinion, majority of the time, mine differs from everyone else's.:laughing: Honestly, I'm not much of a weldor! I worked way more years as a rigger than a weldor.
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Jorville
Bronze Member
- Joined
- Apr 14, 2012
- Messages
- 90
- Location
- Burnsville, MN.
- Tractor
- WD Allis, Case 580 CK, HD5 Allis crawler, Bantam Koehring track hoe,
It looks like no one ever answered your question. I thought it was the industry standard to Tig with argon, Aluminum included. You can't Tig with 75/25, doesn't work for beans. I have found a gas lens helpful in Tig welding welding aluminum. Using argon I have Tig welded brass,aluminum ,steel and stainless steel.
Helium was the first cover gas for Tig, (that is where Heliarc came from) Helium makes a poor cover gas because it is lighter than air. It was never used for a cover gas on a Tig machine where I worked.
Mark @ Everlast
Advertiser
DC TIG is a matter of polarity...while it is TECHNICALLY possible to TIG Aluminum with DC, it isn't at all practical.
If you weld in DCEN, you will have nothing but an oxide layer laying on top, even with the cleanest metal. At the very least it will be sooty and dirty.
If you weld with DCEP it will provide the cleaning you need, BUT it will be very hot, and you'll need a huge tungsten and a large torch for low amp welds...and your cleaning area will be huge.
Argon still is the standard for DC TIG and AC TIG. Helium CAN be added to improve the penetration and cleaning if needed.
Anyone trying to sell you a DC tig to do Aluminum is a moron. In a pinch you can make it work, but it is not with the ease or quality of AC.
Watch this...and you'll see exactly what I mean:
http://www.youtube.com/watch?v=RG4ZOwSw9CQ&feature=plcp
If you weld in DCEN, you will have nothing but an oxide layer laying on top, even with the cleanest metal. At the very least it will be sooty and dirty.
If you weld with DCEP it will provide the cleaning you need, BUT it will be very hot, and you'll need a huge tungsten and a large torch for low amp welds...and your cleaning area will be huge.
Argon still is the standard for DC TIG and AC TIG. Helium CAN be added to improve the penetration and cleaning if needed.
Anyone trying to sell you a DC tig to do Aluminum is a moron. In a pinch you can make it work, but it is not with the ease or quality of AC.
Watch this...and you'll see exactly what I mean:
http://www.youtube.com/watch?v=RG4ZOwSw9CQ&feature=plcp
