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Different types of aluminum..(5 posts)

Different types of aluminum..Kevin Gingras
Mar 26, 2002 1:46 PM
Can different types of aluminum be used on a frame? For example if a custome frame builder uses Columbus tubing, could they mix and match Altec 2 and Airplane or Starship together?
re: Different types of aluminum..brider
Mar 26, 2002 2:34 PM
Not a metallurgist, but I work with a lot of aluminum (engineer in the USs only commercial large-airplane manufacturer). Though I'm not familiar with the specifics of the tubing you referenced, it's aluminum. Different allows can be welded together easily, though there may be some knock down of the fatigue life. However, the heat-affected zone of the weld is going to have a greater impact on the frame's longevity than the mixing of alloys.
re: Different types of aluminum..prestigio
Mar 26, 2002 4:34 PM
Starship has different metal composition compare to Altec and Airplane. Starship requires higher tempreture to weld too. So by the time you managed to weld Starship, the other two metal may have been liquidfied. . I doubt you can mix and match Starship with Airplane or Altec but possibility is on Airplane and Altec. The later tubing has more or less the same form of metal composite....Al+Zn+Mg. refer to
Thanks for the info! **Kevin Gingras
Mar 26, 2002 6:20 PM
Mar 27, 2002 6:59 AM
The tubesets are matched. Most custom welders will heat-treat the frame after welding anyway. Broadly speaking you can mix different 6000 series alloy sets and different 7000 series alloy sets. Why wld you want to mix Columbus tubesets anyway?