John Doe wrote:

Is there any difference between 6061 aluminum and aircraft grade
aluminum for that purpose?

Is "aircraft grade" something like "industrial strength" or "heavy
duty"?


Yep




The problem is, there are several different "aircraft grade" aluminums
- of which 6061 T6 is one. All Zenith aircraft are built almost
exclusively of 6061 T6

6061 T6 is les likely to crack when bending than a 7000 series in T6.
T6 is a hardness spec (solution heat treated and aged IIRC) and is
harder than T3 or T0 (normalized)
** Posted from http://www.teranews.com **


5052-O is most often used for aircraft fuel tanks since it is easily
formed and weldable.


But I wouldn't try to design a wing with it


--

Richard