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Thoughts on argon for steel?



JoshF
07-26-2009, 07:15 PM
So I just ordered a plasma cutter,mig welder and spool gun from longevity.
So Im now really broke. I was thinking about just getting an argon tank. I know people suggest a mix for steel and argon for aluminum but I dont want to buy two tanks.
Any reason I couldnt use straight argon on steel? All ofd my past experience is using straight co2.

Gadget
07-26-2009, 08:00 PM
That's all I use for steel, stainless, and aluminum.
Dan

KHK
07-26-2009, 08:25 PM
I also use argon Al, Steel, stainless

henrym
07-27-2009, 12:48 AM
Argon is best for everything... FOR TIG. it seems the question is regarding MIG welding gas. apparently co2/Ar mix is used because when GMA-Welding steel, a reaction of iron and co2 is used to increase heat and therefore penetration. Ar is added for cleanliness/stability.

strait Ar makes lumpy MIG welds with little penetration in steel I hear.

Henry

KHK
07-27-2009, 08:08 AM
henrym is correct I missed the MIG part of the origional question. I do not have a MIG welder and was talking about TIG, sory

Gadget
07-27-2009, 05:30 PM
And I just plain didn't know there was a difference, sorry too.
Glad Henrym set it straight. Thanks Henrym.

Dan

torqueman
07-27-2009, 07:13 PM
When I got the tank for my MIG the guy at the store said the c02/argon mix was best.

bhardy501
07-28-2009, 07:23 PM
Yep, I have always heard 75/25 for MIG (steel) and straight Argon for TIG and MIG aluminum. You could probably go to Airgas web site and find more info.

robert
12-30-2009, 05:57 AM
With c-25 youll get a cleaner looking weld staight c02 youll get a little more penitration but more spatter c02 is also cheaper.

junes
12-30-2009, 03:54 PM
You got it a mix is best and c25 is the gas to get with short circuit mig and globular transfer. For spray transfer it's not the case.

robert
12-31-2009, 04:36 AM
That is true for spray you need more argon and less c02.

robrob
01-12-2010, 07:49 AM
My understanding is MIG Aluminum welding requires a flux core wire so I don't think the gas mixture really matters. A bottle of C-25 should be all you need.

junes
01-12-2010, 09:30 AM
As far as I know there is no suh thing as flux core aluminum wire. I mig aluminum with argon.

robrob
01-12-2010, 02:53 PM
Oh well, never mind then--I know you know a lot more about welding than I do. I'm not sure what I was thinking of.

junes
01-14-2010, 05:32 AM
Its all good it would be cool if they came up with a tubular aluminum wire.

Bikespot
01-16-2010, 01:48 PM
Its all good it would be cool if they came up with a tubular aluminum wire.

I think there is one , im not to sure on that. If not that would be a cool idea. Same with SS.

Kiwimike
02-22-2010, 08:20 PM
CO2 is great for Mig welding steel and as previously mentioned is a lot cheaper than Argon, however if you are doing a lot of continuous runs then CO2 will freeze up a normal gas regulator. If you are doing a lot of CO2 welding then you will need a heated regulator.
CO2/Argon Mix (Corgon) is a better way to go, as the regulator won't freeze up with extended use.

Dave Trunks
05-24-2010, 01:19 PM
Straight Argon can be used for non critical work but the CO2 in the mixed gas is what helps the weld to penetrate.......the CO2 also helps with edge wetting and smoothing out the weld bead. Dave

Gadget
05-24-2010, 01:32 PM
Straight Argon can be used for non critical work but the CO2 in the mixed gas is what helps the weld to penetrate.......the CO2 also helps with edge wetting and smoothing out the weld bead. Dave

Hi Dave and welcome to the forum. We like pictures here so be sure to include some showing your work. Also, keep an eye out for the next contest here. The odds of winning a great new Longevity machine are very good. Please post some information about yourself in the introduce yourself section so we can get to know you.
Dan

tomsign
05-25-2010, 04:00 PM
Henrym nailed it
75/25 for mig
Tomsign

Scott Hightower
06-13-2010, 06:33 AM
If you weld mild steel with straight argon the weld may look OK but its not.

I use straight Argon for aluminum.
85/15 mix for thin gauge
75/25 for large wire heavy gauge
If you want to cheat a little use 80/20 for all mild steel

Scott
Fab Manager
Welders360 (http://www.welders360.com/)

Gadget
06-13-2010, 09:19 AM
Hi Scott and welcome to the forum. When you have a chance, please post something about yourself in the introduce yourself section so we can get to know you. We like pictures here so be sure to include some showing your work. Also, keep an eye out for the next contest here. The odds of winning a great new Longevity machine are very good.
Again, welcome,
Dan

JoshF
07-02-2010, 11:02 AM
Wow I forgot I asked this here. Long story short I tried it. It was possible to get good welds but it was a pita. So i picked up a mix tank. IA year later I still havent tried the spool gun and aluminum yet.

jakazz
07-22-2010, 10:32 AM
Your gonna love al in the spool gun, just watch the burn back on the tips, your gonna burn the tips a few time....they will be junk... and the wire will clog in the gun. Once you get past that initial PITA a couple few times you will really pay more attention to the stick out. Ask me how I know haha

Lonewolf9029
10-28-2010, 09:28 PM
I like to run tri-mix when running my MIG gun on SS. C02,Argon,&Helium. It's pricey at $80 a refill. For TIG I use strait Argon on SS and aluminum. I like to lease my bottles rather than own them (just personal choice). That way I can just get them to throw them in the truck. They only charge me a deposit on one cylinder; the others just contents. Make friends and get to know the people a welding supply houses. It can sure have it's benefits. Don

tigqk
11-17-2010, 02:26 AM
No you can not use straight argon because you will not get the penetration you need with the mig,if you got the amps though you can try spray transfer with your argon that is what argon is used on steel for.C25 or/75/25 is about the best no way around it your going to have another tank, flux coat is messy, your going to have five or six in your shop if you have oa.You can use c02 but it isn;t the best but will last a long time.