I suppose it might sort of work on steel and stainless steel, but I'll
bet the tungsten will erode very quickly. No idea how much weld
quality will suffer, outside of inevitably being ugly. I'm quite sure
it won't work at all on aluminum.
There is no commercial gas mix of 98% Argon / 2% CO2 that I have ever
I think you meant 2% Oxygen.
98/2 Argon Oxygen is a very hot spray-process MIG gas for steel.
The oxygen content would likely eat your tungsten.
That's what I said, O2.
What just happened is a very educational story in many ways.
I responded to an ad in Craigslist for a gas fired blacksmith
forge. Went there, liked the forge, knocked the price down a bit,
agreed on price and bought a few more things.
The owner also offered me a 251 cf tank of Argon/O2 mix for $50, which
I decided not to buy right away and posted a question about it here
when I went on my way.
An hour later, while still driving, I got an email from the seller
stating that he could not locate the money that I paid for the
forge. I looked in my pocket and there it was, neatly folded.
So I caled, came back and gave him the money. He was understandably
very happy, as he probably had all kinds of bad thoughts and felt
So, he gave me the bottle of that mix for free, and who I was to say
no.that was10 minutes ago.
This, by the way -- forgetting to pay -- happened to me before.
As long as it is an owner bottle, you should be able to trade it for a
similar sized bottl with the gas of your choice (after paying for the
fill). I have turned in straight argon bottles and gotten C25 or
nitrogen, depending on what I needed at the time. A bottle is a bottle
as long as it is an owner bottle.
I did that one time on a lawnmower at a yard sale. Got to talking to the
guy about the good old days, and we both worked at the same joints and knew
a lot of the same people. I saw it after I drove off, and went back and
paid him. He said thanks, and he was glad some honest people were left.
Look at the collar for a name cast in there. If the shoulder just comes up
to the valve opening, it's an owner tank. If there's a name stamped in cast
iron, it belongs to someone, and you may have difficulty or impossibility to
trade it out depending on where you live and who you deal with.
Yes, but are you sure, Iggy? A long time passes from when you look at it
and then come in and type it. What's that, you wrote it down? Well, how
can you be sure of that? Pencils make mistakes, you know.
BTW, I think you got it right.
is a two-part gas mixture of argon and oxygen
which improves arc stability and provides a more
fluid weld pool. The filler metal transfer
with argon / oxygen helps reduce spatter
levels, and the fluid weld pool permits
higher travel speeds.
Igor, just think of that cylinder as a token which you can swap for any other
high pressure cylinder (plus paying for the gas). Oxygen, argon, any of the
argon/CO2 blends, helium, nitrogen; all use high pressure cylinders. It's
a great score and obviously an owner cylinder.
OK, thanks. Airco is called Airgas now, right?
It does have AIRCO on the collar, it is on the other side from the
label. So, while I also think that it is an owner cylinder, I am not
sure that it is fully a given. I am not losing sleep over this
question as I do believe that guy and I did not pay for the tank,
A couple weeks ago My son needed to weld some SS tubing. He wanted to
use my SP125+ mig so i set it up with some 309 SS wire. The book says
to use 98 Ar/2 O2 mix. All I have is straight argon and C25 mix. So he
used the straight argon. It seemed to weld OK. I tried welding some
sheet first and was able to get sound welds. But the welds do not have
the same appearance as tig welds. My tig SS welds don't oxidize on the
bead, the tig welds tended to get a black oxide coat, similar to what
happens on the unsheilded side a SS sheet when welded. Not sugary, but
black and tenacious. Not consistently either. I'm wondering if maybe
the SS welds need more gas flow than regular steel mig.
You will know when you go to get it filled. Local suppliers DO have some
leeway when it comes to these situations, because they don't want to lose a
customer over an issue of a tank that the person more than likely came by
legally, or at least with no intent involved, even if they did posess
questionable goods. I am in exactly that position right now. I have an 02
tank that has yet to be settled upon. I have a new supplier who said,
"bring if in, and I'll look at it, and I'll see what I can do." Much better
than the sassy, "No way, NO how" of the other guys. Who, BTW, I spent
$3,000 with in 2008. If this other supplier takes this tank and does me
right, I'm going back to that supplier, make sure I'm talking to someone in
charge, and explain why I won't be spending $3 with them in 2009.
It ain't over till it's over, Ig, and it ain't over yet. Attitude means a
lot, and if you're polite, and just let them know that you got this thing
legal, they may take care of you. (Be sure to explain that you will never
forget this, and will be coming back for supplies in the future.) These
clowns have a lot more leeway than they let on.