Brazing aluminum-copper

By shaquile26 Date 04-18-2005 06:59

Hi
Im engineer in technological center from Spain. I write to ask to him on brazing of aluminium to copper. What filler metal is used? Who it´s the procees (temperature, atmosphere...)?.
Thanks

By weldo

Date 12-04-2005 08:00

Not a recommended procedure, but you should find the info. you're looking for here: http://www.jwharris.com/jwref/chart/

Steve

By Bob Peaslee (*)

Date 12-21-2005 16:18

Steve is correct, the direct brazing of aluminum to copper is not recommended as it results in intermetallic, which compromise the joint strength.
If the copper is plated with 0.0127 to 0.025 mm of nickel, the aluminum can be brazed to the plated copper using AWS BAlSi-4 brazing filler metal (Al-11-13% Si) using any of the standard aluminum brazing methods. Bob Peaslee