Our last video introduced you to the numbering system that identifies the common alloy chemistry and what the alpha portion of the "temper" designation means. For the full transcript click here and for aluminum tempers explained:
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Today we are taking a deeper dive into the subdivisions of the T tempers before we move on to talking about specific alloys in the 2xxx, 6xxx, and 7xxx series.

Common examples of alloy and temper....

2011-T3, 2024 -T4, 2024-T351, 7075-T6, 7075 - T73511...lots of numbers here.  What does it all mean?

All the heat treatable alloys are strengthened by precipitation hardening. Cold working can supplement the heat treatment in achieving the required properties as shown in some tempers. Cold work that does not affect the properties is not prohibited in other tempers.

A two step process that first creates a uniform distribution of the chemical elements  .. is called a  solution treatment.  This is done by heating the alloy to about 900 degrees F and then  quenching to cool rapidly, usually in water.

The second step, precipitation or ageing allows some of the elements to form particles within the structure that results in strengthening the alloy.

In some alloys this can occur at room temperature and is termed naturally aged.  When the precipitation step requires heating its termed artificially aged.

Time and temperature for each step vary by alloy and are typically performed by the producing mill.

Chapters:
Intro: 00:00
Aluminum Tempers and Aluminum Temper Descriptions: 00:26
What is Aluminum Temper T1?: 02:11
What is Aluminum Temper T2?: 02:26
What is Aluminum Temper T3?: 02:32
What is Aluminum Temper T4?: 02:43
What is Aluminum Temper T5?: 02:57
What is Aluminum Temper T6?: 03:09
What is Aluminum Temper T7?: 03:17
What is Aluminum Temper T8?: 03:30
What is Aluminum Temper T9?: 03:37
What is Aluminum Temper T10?: 03:41
Additional Aluminum Temper Designations: 03:49
What Does an Aluminum Temper Ending in 51 mean?: 04:18
What Does a Zero at the end Mean in an Aluminum Temper? 04:54
What does T6511 Mean??: 05:04
Check the Specs: 05:18
Outro: 06:00

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