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_.
73
Alan NV8A
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