On May 29, 12:02 pm, Bob Kuykendall wrote:

As for another poster who says that 6061-T6 is too brittle, do you
have a cite for that very general assertion? How does that reconcile
with the fact that Zenith makes entire airplanes out of the stuff?

Thanks, Bob K.http://www.hpaircraft.com/hp-24

2024T3 (not Alclad) has a tensile ultimate of 70KSI and a yield of
50KSI, with elongation of 18% and a Brinell hardness of 120.
6061T6 has an ultimate of 45KSI and a yield of 40, elongation 12%,
Brinell 95.
So the 2024T3 is a LOT stronger but a little more ductile (so
less brittle?) and at the same time, strangely, harder. I wouldn't
replace the 2024 with the 6061 in anything I don't want to break.
References from Machinery's Handbook, 24th Ed., 1992.

Dan