[TowerTalk] Aluminum grading

[Jim Lux]

At 09:40 AM 3/28/2005, K7LXC at aol.com wrote:
>From: "Tom Hellem" <tomhellem at czo.net>
>Subject: [TowerTalk] Aluminum grading
>To: "Towertalk submit" <towertalk at contesting.com>
>Message-ID: <009801c533a8$80083130$6401a8c0 at upstairs>
>Content-Type: text/plain;    charset="iso-8859-1"
>
> >> Hi All:
> >>  My local scrapyard has several pieces of 6105-T6, 12' long,  1.9" dia.
>with
>a .109 wall thickness. Was thinking about using it for a boom for a 6 meter
>beam. Can't seem to find any tables on the web that explain the specs for
>each grade of aluminum, i.e. yield strength, etc., so can compare the
>different grades to the ones commonly used by beam manufacturers such as
>6061-T6. Can anyone point me to such an animal, or tell me if my boom is
>going to hold up or fold up?
>
>     0.1 seconds on google turned up
>http://www.wernerco.com/ExtrudedProducts/alloy.html. It has the same yield 
>strength as 6061-T6.
>
>     Give it a try. Sounds like it'll work FB; depending on your local
>windspeed and ice conditions, that is.

Interesting that they have a -T6 temper.  (the other sites all had a 
-T5)  It appears that the -T6 is popular for aluminum pipe.

38 ksi = 262MPa.  (the higher numbers (260/310 MPa) appear to be for DIN specs)