Hey folks,
I was given a bottle of 95/5 argon-hydrogen pre-mix to use up, it was used in chamber welding, would there be any problem using it with tig welder out in atmosphere!
- Otto Nobedder
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Weldmonger
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Posts:
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Joined:Thu Jan 06, 2011 11:40 pm
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Location:Near New Orleans
No hazard.
The LEL (Lower explosive limit) for H2 "in atmosphere" is 4%. Your mix is at 5% in inert gas, which will diffuse to under 1% before it's fully "in atmosphere", so you should not even notice effects outside the weld zone.
The H2 is a common additive for increasing heat in heavy SS welds, much like He in Al welds. The 5% seems high, and may be for a specialty.
Rediron881 knows more about these mixes than I do, so I hope he chimes in here.
Please post your results!
Steve S
The LEL (Lower explosive limit) for H2 "in atmosphere" is 4%. Your mix is at 5% in inert gas, which will diffuse to under 1% before it's fully "in atmosphere", so you should not even notice effects outside the weld zone.
The H2 is a common additive for increasing heat in heavy SS welds, much like He in Al welds. The 5% seems high, and may be for a specialty.
Rediron881 knows more about these mixes than I do, so I hope he chimes in here.
Please post your results!
Steve S