6xxx · Magnesium-silicon alloy
6005A aluminium — composition, properties and extrusion notes
A stronger structural alternative to 6063, developed for extruded transport profiles.
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) |
|---|---|---|---|---|
| T5 | 270 | 225 | 8 | 85 |
| T6 | 260 | 240 | 8 | 90 |
Typical values for extruded product. Minimum guaranteed values depend on temper and product form — the mill certificate governs.
Composition limits
| Element | Limit (%) |
|---|---|
| Si | 0.50–0.90 |
| Fe | 0.35 |
| Cu | 0.30 |
| Mn | 0.50 |
| Mg | 0.40–0.70 |
| Cr | 0.30 |
| Zn | 0.20 |
| Ti | 0.10 |
| Al | remainder |
Single figures are maxima; ranges are the permitted window.
Working with this alloy
- Density
- 2.7 g/cm³
- Common tempers
- T5, T6
Physical properties
| Property | Value |
|---|---|
| Thermal conductivity | 200 W/m·K |
| Melting range | 585–650 °C |
| Electrical conductivity | 47 % IACS |
When to use it
Extrudes well while carrying roughly 50% more yield strength than 6063, which is why it is the usual choice for load-bearing transport sections.
Typical applications
- Rail and road transport profiles
- Structural framing and beams
- Automotive body sections
- Solar mounting rails
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.
6060
A close relative of 6063, tuned for a slightly brighter anodised finish.