On Tue, 07 Oct 2008 03:50:49 GMT, John Doe
wrote:


Planning to use a short piece (2 or 3 inches) of 5/8" outer diameter
aluminum tubing. The wall thickness will be 1/16" to 1/8".

Pressing down on the center of the tube will be a maximum momentary
pressure of very roughly 300 pounds (a wild guess).

Is there any difference between 6061 aluminum and aircraft grade
aluminum for that purpose?
http://www.matweb.com/search/DataShe... 0be5b&ckck=1
http://www.matweb.com/search/DataShe...f43f79c 51b7d

Both yield and ultimate tensile for 7075-T6 are at least 80% higher
than 6061-T6.

--
Ned Simmons