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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
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
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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