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Back side purge for stainless welding

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BobH

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Jul 18, 2008, 1:21:15 PM7/18/08
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I have some 300 series stainless to weld and was wondering if C25 would
be OK to use for the back side purge? I used to have a spare argon
cylinder that I put a regulator and flow meter on for back side purge,
but that is now a C25 cyclinder.

Thanks,
BobH

Ernie Leimkuhler

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Jul 18, 2008, 11:36:46 PM7/18/08
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In article <636d7$4880d10a$8c631746$30...@news.deru.net>, BobH
<WanderingMetal...@yahoo.com> wrote:

C25 would be very bad.
The CO2 gas in C25 is not inert.

Nitrogen is a lower cost replacement for Argon, if welding Stainless,
but not if welding titanium.

BobH

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Jul 18, 2008, 11:46:46 PM7/18/08
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Thanks, I was afraid you would say that...

I was hoping that I could squeak by with it as a back side purge, but I
want this to be right.

Regards,
BobH

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