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Aluminium Products

Tempers Analysis of Aluminum Alloy


What is Temper in Aluminum Alloy?

T-Tempers: Heat-Treated

  • T1 - cooled from an elevated temperature shaping process and naturally aged to a substantially stable condition

  • T2 - annealed (cast products only)

  • T3 - solution heat-treated and then cold worked

  • T4 - solution heat-treated and naturally aged to a substantially stable condition

  • T5 - cooled from an elevated temperature shaping process and then artificially aged

  • T6 - solution heat-treated and then artificially aged

  • T7 - solution heat-treated and then stabilized

  • T8 - solution heat-treated, cold worked, and then artificially aged

  • T9 - solution heat-treated, artificially aged, and then cold worked

  • T10 - cooled from an elevated temperature shaping process, artificially aged and then cold worked


Additional digits for T tempers include the following:

  • T51- stress relieved by stretching

  • T510- receives no further straightening after stretching

  • T511- receives minor straightening after stretching to comply with standard tolerances

  • T52 - stress relieved by compressing

  • T54 - stress relieved by combined stretching and compressing


Specification of Temper in Aluminum Alloy


Name

Introduction & Application

F

Free working condition

It is suitable for the products with no special requirements for work hardening and heat treatment conditions in the process of forming. The mechanical properties of the products in this state are not specified

O

annealed condition

Suitable for fully annealed products with minimum strength

H

Work hardening condition

It is suitable for products with enhanced strength through work hardening, which can undergo (or not) additional heat treatment to reduce the strength after work hardening  

The H must be followed by two or three Arabic numerals

T

heat treatment condition

Suitable for heat treatment, after (or without) work hardening to reach a stable state of the product  

The T code must be followed by one or more Arabic numerals


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