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Up Topic Welding Industry / Technical Discussions / Al with Cu weld by Tig/Mig process
- - By akshita jain Date 02-12-2010 04:18
Hi members,
I am finding a suitable tig rod/mig wire to join copper stripe to aluminium sheet .
Please suggest.
Parent - By 803056 (*****) Date 02-12-2010 04:51
I don't believe you  will find one.

Al
Parent - - By Lawrence (*****) Date 02-12-2010 10:24
Ak****a

Welcome to the forum!

I think Al is right.   Aluminum and Copper do not make good partners

Riviting might be an option but corrosion issues would come quickly..

Material selection appears to be your real problem.  But tell us more about your project, what your are making and what service conditions the joints must withstand.

Ross... You can explain to the Gent why the forum will not allow me to spell out this fellows name    :(
Parent - By ross (***) Date 02-12-2010 12:42
Hmmm. A bug in the program, I guess.

Ross
Parent - By akshita jain Date 02-13-2010 12:52
I have to join the copper bar wih Al in the transfommer
- By OBEWAN (***) Date 02-13-2010 16:48
You might look into explosion welding, but that would mean you need to send out sub-assemblies - assuming your design would allow sub details to be explosion welded.
- - By labib (*) Date 02-13-2010 19:44
You weld Al to Cu (brazing) by MAGNA 51 alloy which join all white metal and join any other metal such as copper, brass, steel, stainless steel or broze. It has an altra low application temperature of 179 degree - tensile strength 17,000 psi.
Parent - - By Lawrence (*****) Date 02-13-2010 23:25
If the application temperature is 179 degrees the joint is soldered.

To be a braze the melting temperature of the filler must be above 450 °C (840 °F)

Neither brazed joints or soldered joints are considered welds.
Parent - By DaveBoyer (*****) Date 02-14-2010 05:36 Edited 02-14-2010 05:38
You are of course right about the technical details. In this case the soldering process is probably His best bet. As to the alloy mentioned, I can't say as I never used it. The low melting temperature, especially if that is degrees F may be a problem.
Parent - - By jarcher (**) Date 02-14-2010 13:00
Yep its a solder, made in China. Most likely a common tin-lead solder, though the importers no where give the chemistry. Biggest issues I would have buying this stuff is:

1. The almost hokey advertising - no where is it called a simple lead based solder, the advertising has this "gee-whiz, super material" tone to it.
2. Mainland China origin.
3. The fact that the poster touting this stuff spams the forum every time a bimetallic question comes along, with the same "gee-whiz" tone used in the decidedly overwrought advertising.

http://www.breckocorp.com/magna51.htm
http://www.magnagroup.com/products/magna/pdf/literature/dis_51.pdf
Parent - By DaveBoyer (*****) Date 02-15-2010 03:40
Perhaps a mixture of snake oil & unobtanium.
- By mooseye (**) Date 02-16-2010 23:17
I would just run down to Ace and get a bucket of small bolt holes.
Up Topic Welding Industry / Technical Discussions / Al with Cu weld by Tig/Mig process

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