On Sun, 9 Feb 2014 17:32:13 -0800 (PST), "
wrote:

On Sunday, February 9, 2014 7:10:45 PM UTC-5, John B. wrote:


You could have argued that "T-6" was actually a marine alloy as it is,

so often, used to designate the masts and spars of sail boats :-)



Cheers,



John B.

You need to refresh your memory on aluminum alloys. As I remember all the marine alloys are five thousand and something.

Dan
But they will be used in the T6 condition - which is about the
hardest AND toughest an aluminum alloy can be - Solution Heat trested
and artificially aged..