02GF74
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 posted on 26/2/09 at 01:37 PM |
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lumiweld, technoweld - join aluminium to copper?
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?
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John Bonnett
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| posted on 26/2/09 at 01:42 PM |
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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
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Mr Whippy
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| posted on 26/2/09 at 01:46 PM |
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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]
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hughpinder
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| posted on 26/2/09 at 01:50 PM |
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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
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hughpinder
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| posted on 26/2/09 at 01:54 PM |
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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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minitici
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| posted on 26/2/09 at 01:56 PM |
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HTS-2000 can also be used for copper to alloy joints.
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Mr Whippy
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| posted on 26/2/09 at 01:58 PM |
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quote:
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
yeah that’s the point, its only melting and combing with the aluminium, for the other metals its no better than solder.
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SteveWalker
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| posted on 26/2/09 at 08:03 PM |
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You can buy them in B&Q, in the section with the blowlamps, etc.
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