Temper comparison
T4, T5 and T6: the process behind each one, the strength it gives and when to use it. Choose the alloy to see its values.
Alloy
| T46063-T4 | T56063-T5 | T66063-T6 | |
|---|---|---|---|
| Tensile strength (Rm) | 130 MPa | 175 MPa | 215 MPa |
| Yield strength (Rp0.2) | 65 MPa | 130 MPa | 170 MPa |
| Elongation (A) | 14% | 8% | 8% |
| Process | Solution heat treated and naturally aged at room temperature. | Cooled from the extrusion temperature (press quenched) and artificially aged in an oven. | Solution heat treated and artificially aged to maximum strength. |
O Annealed: the softest and most ductile state.
F As extruded, with no guaranteed mechanical properties.
T64 / T66 Variants of T6: one gives up some strength to gain formability; the other aims for more strength with a controlled composition.
Minimums from the EN 755-2 standard for thin-walled profiles (Rm: tensile strength, Rp0.2: yield strength, A: elongation). The values vary with the thickness and shape of the profile.
Which temper does your application need?
We help you choose the alloy and temper based on how the part will be used and worked.
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Frequently asked questions
What does T5 temper mean in aluminium?
That the profile is cooled as it leaves the extrusion press and then artificially aged in an oven. It is the standard temper for aluminium windows and doors.
What does T6 temper mean?
That the material is solution heat treated and artificially aged to its maximum strength. It is used for structural and machined parts.
Which temper should I use if I am going to bend the profile?
T4, which is the most ductile state. After forming, it can be aged to gain strength.