Aluminium alloy 5083 is renowned for its exceptional performance in extreme environments. It offers outstanding resistance to seawater and aggressive industrial chemical conditions, making it one of the most durable aluminium alloys available. Alloy 5083 also retains excellent strength after welding, a key advantage in structural applications. It has the highest strength among non-heat-treatable aluminium alloys. However, it is not recommended for service at temperatures exceeding 65 °C, as prolonged exposure may reduce its mechanical properties. The mechanical properties listed below apply to the O / H111 temper.
Alloy 5083 is commonly used in demanding applications such as:
Alloy: 5083
Spec: BS EN 573-3:2009
| Chemical Element | % Present |
|---|---|
| Manganese (Mn) | 0.40 – 1.00 |
| Iron (Fe) | 0.40 (Max) |
| Copper (Cu) | 0.10 (Max) |
| 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 (0.2 – 6.3 mm thickness)
Spec: BS EN 485-2:2008
| Property | Value |
|---|---|
| Proof Stress | ≥ 125 MPa |
| Tensile Strength | 275 – 350 MPa |
| Hardness (Brinell) | 75 HB |
Plate (6.3 – 80 mm thickness)
| Property | Value |
|---|---|
| Proof Stress | ≥ 115 MPa |
| Tensile Strength | 270 – 345 MPa |
| Hardness (Brinell) | 75 HB |
Plate (80 – 120 mm thickness)
| Property | Value |
|---|---|
| Proof Stress | ≥ 110 MPa |
| Tensile Strength | ≥ 260 MPa |
| Hardness (Brinell) | 70 HB |
| Elongation (A) | ≥ 12 % |
Alloy 5083 corresponds to the following standard designations (not necessarily direct equivalents):
The most commonly supplied tempers for 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 |
