Aluminium alloy 5083 is widely recognised for its exceptional performance in extreme service environments. It offers outstanding resistance to seawater and aggressive industrial chemical conditions, making it ideal for demanding structural applications. Alloy 5083 also retains excellent strength after welding and provides the highest strength among non-heat-treatable aluminium alloys. However, it is not recommended for continuous service at temperatures above 65 °C, as elevated temperatures may reduce mechanical performance. The mechanical properties listed below apply to the H32 temper.
Alloy: 5083
Spec: BS EN 573-3:2009
| Chemical Element | % Present |
|---|---|
| Manganese (Mn) | 0.40 – 1.00 |
| Iron (Fe) | 0.00 – 0.40 |
| Copper (Cu) | 0.00 – 0.10 |
| Magnesium (Mg) | 4.00 – 4.90 |
| Silicon (Si) | 0.00 – 0.40 |
| Chromium (Cr) | 0.05 – 0.25 |
| Aluminium (Al) | Balance |
| Property | Value |
|---|---|
| Density | 2.65 g/cm³ |
| Melting Point | 570 °C |
| Thermal Expansion | 25 × 10⁻⁶ /K |
| Modulus of Elasticity | 72 GPa |
| Thermal Conductivity | 121 W/m·K |
Sheet: 1.0 mm to 6.30 mm
Spec: BS EN 485-2:2008
| Property | Value |
|---|---|
| Proof Stress | 215 MPa (Min) |
| Tensile Strength | 305 – 380 MPa |
| Hardness (Brinell) | 89 HB |
Aluminium alloy 5083 corresponds to the following designations (not direct equivalents):
The most common tempers for aluminium alloy 5083 include:
When welding 5083 to itself or to alloys from the same sub-group, the recommended filler metal is 5183. Alternative suitable fillers include 5356 and 5556.
| Property | Rating |
|---|---|
| Weldability – Gas | Average |
| Weldability – Arc | Excellent |
| Weldability – Resistance | Excellent |
| Brazability | Poor |
| Solderability | Poor |
| Property | Rating |
|---|---|
| Cold Workability | Average |
| Machinability | Poor |
