Al 6061-T6 vs. T62 vs. T651

[Keith B. Lewis]

What is the difference between the three tempers of Aluminum 6061: T6,
T62, and T651? More generally, where can I find a description of these
designations. I've tried Metals Handbook (vol 1 and 2 and desk edition)
and ASTM B209 and B211. The closest I can get is that the second and third
digits indicate modifications to the T6 temper by stress relieving or
minor straining of the material by rolling or pulling. I would like a
description of the processes which create and the properties of the
various tempers for aluminum alloys but especially for 2024 and 6061.

Keith

[Rob Wingate]

In article <kblewis-2409...@kblewismac.nswc.navy.mil>,

There is some description of the basic temper designations and
subdivisions for aluminum alloys in MIL-HDBK-5, MILITARY STANDARDIZATION
HANDBOOK, Metallic Materials and Elements for Aerospace Vehicle
Structures.

Quoting, "Additional digits, the first of which shall not be zero, may be
added to designations T1 through T10. These digits indicate a variation
in treatment which significantly alters the characteristics of the
product. These additional digits may be arbitrarily assigned and
registered with the Aluminum Association for an alloy and product form
........"

So for detailed info, you might want to contact the Aluminum Association.

Rob

[Keith B. Lewis]

> > What is the difference between the three tempers of Aluminum 6061: T6,
> > T62, and T651?>
>

> There is some description of the basic temper designations and
> subdivisions for aluminum alloys in MIL-HDBK-5, MILITARY STANDARDIZATION
> HANDBOOK, Metallic Materials and Elements for Aerospace Vehicle
> Structures.
>
> Quoting, "Additional digits, the first of which shall not be zero, may be
> added to designations T1 through T10. These digits indicate a variation
> in treatment which significantly alters the characteristics of the
> product. These additional digits may be arbitrarily assigned and
> registered with the Aluminum Association for an alloy and product form
> ........"
>
> So for detailed info, you might want to contact the Aluminum Association.
>

There is an excellent description in Machinery's Handbook. Thankyou to
those who replied.

Keith

[wangch...@gmail.com]

Great