[TheForge] Welding advice

[Walter Mullett]

For concrete reinforcement bar, butt welding, I am familiar with the Cadweld
process.  Cadweld is permitted in blast resistant structures but as far as I
know, thermit is not.  I know that Cadweld is a proprietary name but what is
the difference between that and thermit?   

Walt

-----Original Message-----
From: theforge-bounces at mailman.qth.net
[mailto:theforge-bounces at mailman.qth.net] On Behalf Of Andrew Vida
Sent: Tuesday, March 01, 2005 12:26 PM
To: munlaw2 at hcsmail.com; Sponsored by ABANA
Subject: Re: [TheForge] Welding advice

f

Ron Childers wrote:
> Maybe thermit? That's what is used for rr rails.

	I'd considered that.  The only way I can see this as viable, would
be to dope the thermit with alloying elements that would, presumably produce
a filler with the right structural properties, lest the welds become weak
points.  Thermit produces ultra-hot pure iron.  I cannot imagine that pure
iron would be nearly strong enough for the duties to which a battleship
would be subjected.  Just think of the stresses due to the sheer weight of
the vessel.  Forget about withstanding the forced of a torpedo or artillery
shell.  The welds are the weak link.  And how would the iron be carburized
to the correct level?


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