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| posted on 19/9/07 at 06:00 PM |
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What gas to use for stainless
A mate wants me to weld some 304L stainless sheet into a BBQ smoker for him. I've already got the stainless filler wire and use a large cylinder
of BOC Argoshield for welding mild. The chappie at BOC once told me one could get away with using Argoshield to weld stainless but it was better to
use their Stainshield gas. I don't think stainless shield gas is available in the small cannisters which is probably all I'd need, unless
anyone knows any different?
Can I get disposable bottles of Stainless gas?
Would Argoshield work?
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oliwb
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| posted on 19/9/07 at 06:04 PM |
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You want pure argon for welding stainless steel. You wil be able to buy small bottles of pure argon which will work beter than your argoshield. Oli.
If your not living life on the edge you're taking up too much room!
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Simon
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| posted on 19/9/07 at 06:54 PM |
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Small bottles of Argon are available from Halfords for about seven quid. Machine Mart do them too, but for twice that.
ATB
Simon
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JohnN
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| posted on 19/9/07 at 07:34 PM |
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I've got the 1st October 2007, BOC gasses price list in front of me, there are 4 mixes of argon.
Ideally, you need Pureshield Argon for stainless, which is pure argon.
The other 3, Argoshield Light, Universal & Heavy are all mixes with (I think) carbon dioxide. I tried using argoshield light once for
TIG'ing stainless (cos it is 2/3 the price of Pureshield Argon), but whilst it worked it was harder and the result wasn't as good.
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Peteff
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| posted on 19/9/07 at 07:46 PM |
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Argoshield is a mig mix not tig. If you mig stainless with mixed gas you will get impurities from the carbon and the weld will discolour and rust. Tig
will eat the tungsten with Argoshield.
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
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Chippy
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| posted on 19/9/07 at 09:53 PM |
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I have, just today, been Mig welding my stainless exhaust flanges to the starter pipes, (oval to round). I use Argoshield light, and the weld is clean
and neat. So in my opinion the obtaining of pure argon, whilst very nice, is a pure waste of money, unless you are welding alloy, then its an
essential. But then thats my opinion, not every one would, or does agree.  Ray
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daviep
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| posted on 20/9/07 at 05:28 AM |
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I'm with chippy here, if it's not something safety critical I would (and have) just use what ever gas you normally use, results will look
fine. If in doubt test on some scrap first.
Davie
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Angel Acevedo
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| posted on 22/9/07 at 04:22 AM |
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My 2 cents...
If it is going to be used on aBBQ, it will be exposed to High temperatures, and carbon, it will eventually stain...
Beware of what you wish.. for it may come true....
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NS Dev
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| posted on 23/9/07 at 09:06 PM |
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Chippy, you're right but that's for MIG not tig. With tig you'll knacker the tungsten as pete said
edit, I'm an arse, he's using MIG, so yep, I agree with chippy, use the argoshield!
Bloody hell I've welded enough stainless with mild steel filler wire and co2 let alone argoshield!! It isn't pretty but it will do the
job!
[Edited on 23/9/07 by NS Dev]
Retro RWD is the way forward...........automotive fabrication, car restoration, sheetmetal work, engine conversion
retro car restoration and tuning
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Peteff
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| posted on 23/9/07 at 09:40 PM |
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It was JohnN who tried tig with it Nat. As noted it's for a stinky old barbie so who's going to care what it looks like as long as it
burns food .
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
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