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Unread 02-25-2004, 09:29 AM   #12
Butcher
Thermophile
 
Join Date: May 2001
Location: UK
Posts: 1,064
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Probably nitrogen for the gas, it seems commonly used for that sort of application as it's unreactive with most things and easily obtainable.
Out of interest, what are you planning to heat the steel with?
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