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]
Fame is when your old car is plastered all over the internet
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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.
Fame is when your old car is plastered all over the internet
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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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