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A Welding Question



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#1 ncb OFFLINE  

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Posted June 14, 2012 - 12:06 AM

I have flux cored wire in my mig for grab and go conveniance but i picked up the non cored standard mild steel wire by mistake and all i had was argon for doing aluminum, being the non proffesional backyarder i am i gave it a shot with what i had on hand. after backing the wire speed off twice because the wire stubbed the work, i ran what was probably the best weld of my life,had that perfect even sizzle you want to here with a mig. I thought the basic idea with a mig weld was to keep oxygen off during the weld .any of the normal welding gasses{argon,nitrogen,helium,co2} should perform that task.So the question is why are there so many fancy welding mixes and what do they do other than remove more money from my pocket . The wrong gas seemed to do the job perfectly.

#2 KennyP ONLINE  

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Posted June 14, 2012 - 04:37 AM

I use the 75/25 mix and it does a good job. Just have to watch wind when welding outside. It can blow the gas away while you are welding.
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#3 JDBrian OFFLINE  

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Posted June 14, 2012 - 05:08 AM

Argon is an inert gas and will shield the arc. I'm not sure why they blend it but it could have something to do with cost as well as welding factors.
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#4 skyrydr2 ONLINE  

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Posted June 14, 2012 - 07:16 AM

Pure argon is perfectly fine, you will get better penatration, and a purer weld .and it will also raise the tensil of most wire as much as 30% .;)
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#5 Cvans ONLINE  

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Posted June 14, 2012 - 10:31 AM

From past experience different gases react differently to different metals. We were once doing a project (Hot rolled steel) and could not get the porosities out of the welds with the gas we were using. Went to a tri-mix and the problem was solved. Some of these metals coming out of foreign countries is real junk of which this was some. The weld can look good on the surface and like sponge in the middle. A different gas can make a real difference in a few cases.
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#6 cookiemonster OFFLINE  

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Posted June 14, 2012 - 12:45 PM

Argon is exactly what you need for Aluminum. I say you stumbled right into the right thing for the job.

#7 olcowhand ONLINE  

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Posted June 14, 2012 - 04:25 PM

Argon is exactly what you need for Aluminum. I say you stumbled right into the right thing for the job.


But he was welding steel. Pure Argon is fine for steel....just on the expensive side.
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#8 ncb OFFLINE  

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Posted June 14, 2012 - 06:37 PM

But he was welding steel. Pure Argon is fine for steel....just on the expensive side.

well that worked out okay as well because i used to work for union carbide and had one of my old work buds drop the tank off for free. if i was to have 1 gas on hand for doing everthing what 1 would i pick.

#9 olcowhand ONLINE  

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Posted June 14, 2012 - 07:20 PM

If cost weren't that important, or no issue at all, I'd go Argon. But wait for a pro welder to chime in.
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#10 cookiemonster OFFLINE  

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Posted June 14, 2012 - 09:25 PM

But he was welding steel. Pure Argon is fine for steel....just on the expensive side.


Yep. I see what you mean. Read it wrong.

#11 MH81 ONLINE  

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Posted June 24, 2012 - 11:49 AM

The local gas guy has advised using tri mix so you don't have to change tanks to weld different stuff. He says it's as close to a universal gas as he's found.
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#12 coldone OFFLINE  

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Posted June 24, 2012 - 02:26 PM

Great welding info site

http://www.weldingtipsandtricks.com

Probably more info than any of us will ever need.

Edited by coldone, June 24, 2012 - 02:26 PM.

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#13 Texas Deere and Horse OFFLINE  

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Posted June 24, 2012 - 02:48 PM

Coldone, Thanks for the link. There is a lot of great info there for guys trying to learn or improve their welding techniques. I wled all the time as part of my business and there are things there that I can use.. :thumbs:

#14 olcowhand ONLINE  

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Posted June 24, 2012 - 03:02 PM

Great site! Going to do a lot of TIG video watching there for sure!

#15 caseguy OFFLINE  

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Posted June 24, 2012 - 09:36 PM

Thanks for the link Britt! I had an ADD moment and stayed there for 1/2 hour! Great stuff there!





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