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MIG welding using co2 ?.

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Old Aug 14, 2015 | 06:29 AM
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Question MIG welding using co2 ?.

I hear it works well with only slight splatter. Plus a new aluminum cylinder is only $100. Refills are extremely cheap and since it's a liquid that expands as it is dispensed, you can get the same amount of weld time from a 27 inch tall bottle as a 5 foot tall 75/25 bottle.

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Old Aug 14, 2015 | 12:18 PM
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It's what I run. The spatter is worse. It welds a little bit hotter, so if you're running a small machine near the limit of its capabilities using co2 will help you get better penetration.
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Old Aug 14, 2015 | 04:16 PM
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How bad is worse? Like flux core?
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Old Aug 14, 2015 | 07:32 PM
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I don't have tons of experience with flux core. It's a manageable amount with co2, but more than you get with 75/25.
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Old Aug 14, 2015 | 09:49 PM
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Anyone have any weld pics with co2?
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Old Aug 16, 2015 | 11:46 AM
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use antispatter aroesol
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Old Aug 16, 2015 | 08:35 PM
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Like spray on deodorant?
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Old Aug 17, 2015 | 12:20 AM
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On the opposite side.........has anyone ever mig'd with 100% argon?
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Old Aug 17, 2015 | 02:28 PM
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I use 75% argon - 25% co2. I get very little splatter, not even a 1/8 of the splatter you get from flux core.

Last edited by conan; Aug 17, 2015 at 09:18 PM.
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Old Aug 17, 2015 | 10:06 PM
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I have mig welded with tri mix. It runs a lot hotter weld than what you get with 75/25. Never tried strait argon.
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Old Aug 18, 2015 | 12:41 AM
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I would think that you might get a nice weld with straight argon. I'll have to try that sometime. Then again, I've had bad ideas before...............**** man, I'm married.
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Old Aug 18, 2015 | 06:22 AM
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I feel that pain, have the same problem. Have a kid and then you'll really have issues lol.

My car would have been done 2 years ago if it weren't for that. Love them both to death.... But it killed my car progress, just now finally getting going to finish it
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Old Aug 18, 2015 | 12:16 PM
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Originally Posted by Blown06
On the opposite side.........has anyone ever mig'd with 100% argon?
Ive wondered about this as well. I have a miller multimatic that can mig, tig, or stick weld, but in the 6 months ive had it all I've done is tig with it since I have a mig already set up at work. If i could mig with straight argon with good results it would keep me from buying or renting a 2nd bottle for co2.
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Old Aug 18, 2015 | 12:19 PM
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just did some research, straight argon for mig welding makes for poor penetration.
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Old Aug 18, 2015 | 05:47 PM
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I used to get CO2 and the bottle for almost free from my local pub years ago,well worth it at that price.
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Old Aug 19, 2015 | 12:55 AM
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Originally Posted by JL ws-6
I feel that pain, have the same problem. Have a kid and then you'll really have issues lol.

My car would have been done 2 years ago if it weren't for that. Love them both to death.... But it killed my car progress, just now finally getting going to finish it
Ha, my son just turned 1 a couple months ago. Both of us work and the 750/month in day care is pretty much pissing me the **** off. But, like you said, love them to death.

To the guy a couple up, thanks for looking into that. Sounds like it wasn't a good idea.
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Old Aug 19, 2015 | 10:25 AM
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Originally Posted by Blown06
I would think that you might get a nice weld with straight argon. I'll have to try that sometime. Then again, I've had bad ideas before...............**** man, I'm married.



Originally Posted by JL ws-6
I feel that pain, have the same problem. Have a kid and then you'll really have issues lol.

My car would have been done 2 years ago if it weren't for that. Love them both to death.... But it killed my car progress, just now finally getting going to finish it
Same boat as you guys, Blew my clutch 3 months ago and the car gets to sit in the back of the garage waiting on saving program. Before the 2 kids I would have pulled the trans and bought a new clutch the same day I destroyed the old one. Sucks to have to be a responsible adult/parent sometimes lol.
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Old Aug 19, 2015 | 08:15 PM
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Yup. It's the only reason my pos is still not done. But it's getting close now, really not a lot left to do. Little fab work, headers and exhaust, driveshaft, racepak system, wire and plumb fuel system and it's done. Still a lot of $$ just because of what it is, but little by little it's getting chipped away at.
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Old Aug 20, 2015 | 04:14 PM
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Originally Posted by Blown06
On the opposite side.........has anyone ever mig'd with 100% argon?
Yup and it sucks. TERRIBLE penetration
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Old Aug 20, 2015 | 11:04 PM
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Originally Posted by Blown06
On the opposite side.........has anyone ever mig'd with 100% argon?
I have but only when I run out of C25 and I have to hook up the MIG line to the TIG tank. Happens sometimes.

I use the MIG for sheet steel, nothing very thick, about the equivalent of exhaust tubing work. It welds fine on this stuff, never done pure Argon with anything much thicker than about 1/8".
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