Propane, unlike acetylene, will inject lots of free hydrogen into the weld
zone, leaving the weld brittle from the phenomenon called hydrogen
embrittlement. The only fuel gas suitable for welding is acetylene - that is
the only reason it is still sold.
Save money on cutting or heating with propane or other fuel gases, but if you
want to weld, you need to stock acetylene.
Yes, NG, propane, chemtane, MAPP, flameall, propylene and propadiene all
are unsuitable for torch welding. All inject too much hydrogen into the
weld, making it brittle. The only suitable gas for WELDING is acetylene.
Saith Ernie in his gas welding class.
Well dang. I went to propane to save money, and now it looks like I'll be
getting an acetylene cylinder anyway. Sheesh. See what happens when you
ASS-U-ME? Good thing I saved the acetylene hoses when I replaced them with
T type. I never throw anything out anyway.
From what I understand, there are chemicals (or gases) in the propane that
are not compatible with acetylene hoses and you have to use a particular
hose for propane. Don't know if the other is true on using a T hose for
acetylene. How about it Ernie? Are they interchangeable?
Changing the hoses to a T hose was one of the first cautions. Using the
acetylene reg on propane was okayed by people with more knowledge on such
things as I.
Really, about all I can do is double the hoses if I need a long hose on
acetylene, as I have 50' of both. But then, I'd have to buy an acetylene
cylinder, and that was what I was trying to avoid. If I get into this much,
though, I'll just go get one. The propane rig is for light cutting, and
for the anti-gopher device I'm making.
Keep the propane for brazing.
Martin H. Eastburn
@ home at Lions' Lair with our computer lionslair at consolidated dot net
TSRA, Endowed; NRA LOH & Patron Member, Golden Eagle, Patriot's Medal.
NRA Second Amendment Task Force Charter Founder
IHMSA and NRA Metallic Silhouette maker & member.
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