I seem to recall seeing lumi/technoweld or similar solder type rods that will join dissimilar metals, copper to aluminium being one such pair.

Did I dream this up or does such stuff exists?

Anyone used it and what was the result?

You can certainly get solder that will join aluminium to steel.

Trev D might know the answer because he pointed out the solder to me when I saw him last time.

hth

John

I used technoweld for ages both at work and for mending the landys body (had 15kgs of the stuff at one point!) good stuff but cleanliness is imperative, goes like a paste at the right temp so vertical welds are easy, does actually melt the aluminium well under the normal melting temp due to a catalytic reaction. Use to bury industrial diamonds in it for drilling concrete plugs do oil wells haven’t used the other stuff though

but I don't think it welded disimilar metals

linky



[Edited on 26/2/09 by Mr Whippy]

technoweld is great for ali, and can join different alloys of ali no problem. Can't help on copper/ali joint though. What is the relative rate of expansion - welds may crack if there is a big difference!
Hugh

from technoweld.com:

JOINING COPPER OR BRASS TO ALUMINUM - TECHNO-WELD forms a strong bond with copper or brass rather like a hard solder, although it does not form a "fusion weld" as with Aluminum Alloys.

The brass or copper is "tinned" with TECHNO-WELD, and "keyed" by brushing the molten "TECHNO-WELD" into the surface with a Stainless-Steel brush. The Aluminum Alloy is prepared in the normal way, and the "tinned" brass or copper can then be "sweat" together, and a good fillet of TECHNO-WELD added for extra strength..
Hugh

HTS-2000 can also be used for copper to alloy joints.

quote:

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Originally posted by hughpinder
from technoweld.com:

JOINING COPPER OR BRASS TO ALUMINUM - TECHNO-WELD forms a strong bond with copper or brass rather like a hard solder, although it does not form a "fusion weld" as with Aluminum Alloys.

The brass or copper is "tinned" with TECHNO-WELD, and "keyed" by brushing the molten "TECHNO-WELD" into the surface with a Stainless-Steel brush. The Aluminum Alloy is prepared in the normal way, and the "tinned" brass or copper can then be "sweat" together, and a good fillet of TECHNO-WELD added for extra strength..
Hugh

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You can buy them in B&Q, in the section with the blowlamps, etc.