6xxx · Magnesium-silicon alloy
6082 aluminium — composition, properties and extrusion notes
The strongest of the 6xxx extrusion alloys, with good machining behaviour.
How it compares
Relative to the other grades we extrude. This is a selection aid, not a specification.
Mechanical properties
| Temper | Tensile (MPa) | Yield (MPa) | Elongation (%) | Hardness (HB) |
|---|---|---|---|---|
| T4 | 205 | 110 | 14 | 55 |
| T6 | 310 | 260 | 10 | 95 |
Typical values for extruded product. Minimum guaranteed values depend on temper and product form — the mill certificate governs.
Composition limits
| Element | Limit (%) |
|---|---|
| Si | 0.70–1.30 |
| Fe | 0.50 |
| Cu | 0.10 |
| Mn | 0.40–1.0 |
| Mg | 0.60–1.20 |
| Cr | 0.25 |
| Zn | 0.20 |
| Ti | 0.10 |
| Al | remainder |
Single figures are maxima; ranges are the permitted window.
Working with this alloy
- Density
- 2.71 g/cm³
- Common tempers
- T4, T5, T6, T651
Physical properties
| Property | Value |
|---|---|
| Thermal conductivity | 172 W/m·K |
| Melting range | 555–650 °C |
| Electrical conductivity | 44 % IACS |
When to use it
Roughly 40% stronger than 6061 in T6 while still extruding cleanly. Anodises to a slightly greyer tone than 6063, which matters on decorative work.
Typical applications
- Structural beams and bridges
- Heavy machine parts
- Marine and offshore structures
- Truck and trailer frames
Other alloys
1060
99.6% pure aluminium for conductivity, ductility and chemical resistance.
1100
99.0% pure aluminium — the workhorse of the commercially pure grades.
3003
Manganese-bearing alloy — about 20% stronger than 1100 with similar workability.
5052
The strongest common non-heat-treatable sheet alloy, and the marine standard.
6005A
A stronger structural alternative to 6063, developed for extruded transport profiles.