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Re: [TowerTalk] Cadweld

Subject: Re: [TowerTalk] Cadweld
From: NV8A <>
Date: Sun, 09 Jul 2006 18:53:47 -0400
List-post: <>
On 07/09/06 04:54 pm Nick Pair wrote:

> A Cadweld is composed of aluminum powder copper and a fluxing material. When 
> fired it makes a alloy of the surface of the steel rod and the copper in the 
> shot. All the copper wire, copper plating, and copper in the shot alloy 
> together and create the molded cap you see. You can get carbon molds to weld 
> to just about any combination of rods, structural steel, or copper wire sizes 
> you can think of. The thermite (aluminum powder in suspension with oxidizer) 
> was used in WW II and after to disable large guns by melting barrels or 
> important parts of breach area

And I recall a photograph in an old chemistry textbook showing Thermite 
(TM?) being used to repair damaged tram/streetcar tracks _in situ_.


Alan NV8A

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