Aluminum temper chart
The processing methods of aluminum alloy are different according to the specific use requirements. The main processing methods include hot working, cold working, solution heat treatment, aging treatment, annealing treatment, etc. According to different processing methods, the aluminum alloy temper processed products can be summarized by aluminum temper chart as follows:
| temper name | Introduction |
| ‘H’ representative work hardened aluminum alloy temper | It is suitable for products whose strength is increased through work hardening. After work hardening, the product can undergo (or not) additional heat treatment to reduce the strength. |
| ‘O’ is the annealing temper | Suitable for processed products that have been fully annealed to obtain the lowest strength |
| ‘T’ is the heat treatment aluminum alloy temper, which is different from F, O, H temper | It is suitable for products that are stable after (or without) work hardening after heat treatment. The T code must be followed by one or more Arabic numerals (usually heat-treated materials) |
| ‘W’ representative the solution heat treatment aluminum alloy temper | An unstable temper, which is only suitable for alloys that are naturally aged at room temperature after solution heat treatment. This temper code only indicates that the product is in the natural aging stage. |
| ‘F’ is the free processing aluminum alloy temper | It is suitable for products that have no special requirements for work hardening and heat treatment conditions during the molding process. The mechanical properties of the products in this temper are not regulated. |
Aluminum temper chart diagram
Detailed interpretation of aluminum alloy temper chart
| ‘H’ — aluminum temper chart | |
| The first digit after H indicates the method of work hardening treatment | |
| H1 | The pure work hardening temper is suitable for the temper where the required strength can be obtained only by work hardening without additional heat treatment. |
| H2 | The temper of work hardening and incomplete annealing is suitable for products whose work hardening degree exceeds the specified requirements of the finished product, and the strength is reduced to the specified index after incomplete annealing. |
| H3 | The temper of work hardening and stabilization is suitable for products whose mechanical properties are stabilized by low-temperature heat treatment after work hardening or due to heat during processing. |
| H4 | The temper of work hardening and painting treatment is suitable for products that have been incompletely annealed by painting treatment after work hardening. |
| The second digit after H indicates the degree of hardening achieved by the material. Generally, the degree of hardening is divided into 8 levels, 1 is the lowest, 8 is the highest, and 9 represents a super-hard temper with a higher degree of work hardening than Hx8 |
|
| H12 | Work hardened to 25% hardness |
| H14 | Work hardened to 50% hardness |
| H16 | Work hardened to 75% hardness |
| H18 | Work hardened to 100% hardness (fully hardened temper) |
| H19 | Super work hardened temper. The tensile strength of this material should be more than 10N/mm2 higher than that of H18 material |
| H22 | Partially annealed to 25% hardness after work hardening |
| H24 | Partially annealed to 50% hardness after work hardening |
| H26 | Partially annealed to 75% hardness after work hardening |
| H28 | Partially annealed to 100% hardness after work hardening |
| H32 | Stabilized to 25% hardness after work hardening |
| H34 | Stabilized to 50% hardness after work hardening |
| H36 | Stabilized to 75% hardness after work hardening |
| H38 | Stabilized to 100% hardness after work hardening |
| H42 | Painted after work hardening, 25% hardness treatment |
| H44 | Painted after work hardening, 50% hardness treatment |
| H46 | Painted after work hardening, 75% hardness treatment |
| H48 | Painted after work hardening, 100% hardness treatment |
| HXXX temper | |
| H111 | It is suitable for aluminum alloy products that have undergone a proper amount of work hardening after the final annealing, but the work hardening degree is not as good as the H11 temper. |
| H112 | It is suitable for hot-processed products, and the mechanical properties of products in this temper have specified requirements. |
| H116 | It is suitable for aluminum alloy products made of 5000 series aluminum alloy with magnesium content ≥4.0%. These products have specified mechanical properties and anti-flaking corrosion performance requirements. |
| ‘O’ — aluminum temper chart | |
| O1 | The processed material is heated for the same time at approximately the same temperature as the solution heat treatment, and then slowly cooled to a temper at room temperature. |
| O2 | In order to improve the forming performance of the material, a deformation processing temper of superplastic processing (SPF) is performed. |
| O3 | The temper after homogenization. |
| TX — aluminum temper chart (0-10 numbers after T indicate the heat treatment process of the product) |
|
| T0 | After solution heat treatment, after natural aging and cold working temper, it is suitable for products whose strength is improved by cold working. |
| T1 | Cooled by the high-temperature molding process, and then naturally aged to a basically stable temper. It is suitable for products that are cooled by the high-temperature molding process without cold working (straightening and leveling can be carried out, but the mechanical performance limit is not affected). |
| T2 | Cooled by the high-temperature forming process, and naturally aged to a basically stable temper after cold working. It is suitable for products that are cooled by the high-temperature forming process and then subjected to cold working or straightening and leveling to increase the strength. |
| T3 | Cold working after solution heat treatment, and then natural aging to a basically stable temper. It is suitable for products that are cold worked or straightened or leveled to improve strength after solution heat treatment. |
| T4 | After solution heat treatment, it is naturally aged to a basically stable temper. It is suitable for products that are no longer cold processed after solution heat treatment (straightening and leveling can be carried out, but the mechanical properties are not affected). |
| T5 | Cooled by the high-temperature forming process and then artificially aged. It is suitable for products that are artificially aged after being cooled by the high-temperature forming process without cold working (straightening and leveling can be carried out, but the mechanical properties are not affected). |
| T6 | The temper of artificial aging after solution heat treatment is suitable for products that do not undergo cold working (straightening and leveling can be carried out, but the mechanical performance limit is not affected) after solution heat treatment. |
| T7 | The temper of aging after solution heat treatment is suitable for products whose strength exceeds the highest peak point on the aging curve during artificial aging in order to obtain some important characteristics after solution heat treatment. |
| T8 | The temper after solution heat treatment is cold-worked and then artificially aged is suitable for products that have been cold-worked or straightened and leveled to increase their strength. |
| T9 | The temper of artificial aging after solution heat treatment and then cold working is suitable for products whose strength is improved by cold working. |
| T10 | It is cooled by the high-temperature forming process, then cold-worked, and then artificially aged, which is suitable for products that have been cold-worked and straightened to improve strength. |
| TXX temper and TXXX temper (representing the temper after a specific process that significantly changes the product characteristics ,such as mechanical properties, corrosion resistance, etc.;) |
|
| T42 | It is suitable for aluminum alloy products that are naturally aged to a fully stable temper after solid solution heat treatment in O or F temper, and also suitable for products that have mechanical properties of T42 temper after heat treatment of processed products in any temper of the buyer. |
| T62 | It is suitable for aluminum alloy products that undergo artificial aging after solution heat treatment in O or F temper, and also applies to products whose mechanical properties reach T62 temper after heat treatment of processed products in any temper by the buyer. |
| T73 | It is suitable for aluminum alloy products that are aged after solution heat treatment to achieve the specified mechanical properties and stress corrosion resistance. |
| T74 | Same as T73 temper definition. The tensile strength of this temper is greater than the T73 temper, but less than the T76 temper. |
| T76 | Same as T73 temper definition. The tensile strength of this temperis higher than the T73 and T74 temper, and the stress corrosion fracture resistance is lower than that of the T73 and T74 temper, but its anti-stripping corrosion performance is still better. |
| T7X2 | It is suitable for aluminum alloy products whose mechanical properties and corrosion resistance have reached T7X temper after solution heat treatment in O or F temper and artificially over-aged. |
| T81 | It is suitable for aluminum alloy products that are subjected to a solution heat treatment, which undergoes about 1% cold working deformation to increase the strength, and then undergoes artificial aging. |
| T87 | It is suitable for aluminum alloy products that undergo a solution heat treatment, undergoes about 7% of the cold working deformation to increase the strength, and then undergo artificial aging. |
| Stress relief aluminum temper chart (add “51”, “510”, “511”, “52”, “54” after TX or TXX or TXXX temper) |
|
| TX51
TXX51 TXXX51 |
It is suitable for thick plates, rolled or cold-finished bars and die forgings, forged rings or rolled rings that are stretched according to the specified amount after cooling from the high temperature forming process. These products are no longer stretched. The permanent deformation of widest aluminium thick plate is 1.5% to 3%; the permanent deformation of rolled or cold-finished bars is 1% to 3%; the permanent deformation of die forgings, forged rings or rolled rings is 1% to 5 %. |
| TX510 TXX510 TXXX510 |
It is suitable for extruded rods, shapes and tubes which are stretched according to the specified amount after solution heat treatment or cooling from high temperature forming process, as well as drawn tubes. These products will not be straightened after being stretched. The permanent deformation of extruded rods, shapes and pipes is 1% to 3%; the permanent deformation of drawn pipes is 1.5% to 3%. |
| TX52 TXX52 TXXX52 |
It is suitable for products with 1% to 5% permanent deformation by compressing after cooling during solid solution heat treatment or high temperature forming. |
| TX54 TXX54 TXXX54 |
It is suitable for die forgings in which the stress is relieved by cold shaping in the final forging die. |