Aluminum alloys 1

[williedawg]

A Die Design book by D. Eugene Ostergaard published in 1963 uses some Aluminum alloy numbers that are a bit strange,
or they could be the author's shortcut way of defining them. For a shear & tensile strength chart, he lists;

2S-0
2S-1/2H
24S-H
24S-0
24s-T
52S-0
52S-1/2H
52S-H

I'm guessing that,

"0" means annealed
"H" means hard, and thus 1/2H is half-hard
"T" mean tempered

But, what do the 2S, 24S, and 52S related to?
And, what would these be equivalent to in today's available alloys?

Thnx

 

[CoryPad]

The numbers you have are the old ones used by Alcoa 50 years ago. You have guessed correctly about the suffixes.

Here is a table that shows the equivalents using modern designations.

http://www.tpub.com/content/aviationmaintandmisc/TM-1-1500-204-23-6/css/TM-1-1500-204-23-6_114.htm

 

[williedawg]

Thanks, Cory.....just what I was looking for.