**EN AW-5083**

## Product Description

Aluminium alloy 5083 belongs to the 5000-series, characterised by the addition of magnesium (~4.5%) and manganese. It offers outstanding corrosion resistance, excellent weldability, and suitability for cryogenic service to −196 °C. Residual stresses in the stock material may be released during machining of thin features.

$$
-196~^{\circ}\mathrm{C}
$$

## Key Characteristics

• Excellent corrosion resistance — seawater and aggressive chemical environments  
• Good machinability  
• Excellent weldability (MIG and TIG)  
• Suitable for cryogenic service to −196 °C

$$
1-196\,^{\circ}\mathrm{C}
$$

• Not heat-treatable to high strength

**Mechanical Properties — EN 485-2**

| Tensile Strength(Rm) | 270-350MPa |
| --- | --- |
| Yield Strength(Rp0.2) | 125MPa(min) |
| Elongation at Break(A50) | 12%(min) |
| Hardness | ~75HB(Brinell,ISO6506) |
| Elastic Modulus(E) | ~70GPa |
| Density | 2.66g/cm3 |
| Thermal Conductivity | ~117W/m·K |
| Coeff.of Thermal Expansion | 23.7×10^{-6}/K(20-100℃) |
| Melting Range | 570-638℃ |
| Electrical Conductivity | ~29%IACS |

$$
23.7\times10^{-6}/K(20-100^{\circ}C)
$$

$$
570-638\,^{\circ}C\,
$$

**Chemical Composition — EN 573-3**

| Silicon(Si) | ≤0.40% |
| --- | --- |
| Iron(Fe) | ≤0.40% |
| Copper(Cu) | ≤0.10% |
| Manganese(Mn) | 0.40-1.00% |
| Magnesium(Mg) | 4.00-4.90% |

---

| Chromium(Cr) | 0.05-0.25% |
| --- | --- |
| Zinc(Zn) | ≤0.25% |
| Titanium(Ti) | ≤0.15% |
| Aluminium(Al) | Remainder |

## Machining Notes

Good machinability with carbide tooling. Lower cutting speeds than 6082/7075 recommended due to tendency for built-up edge. Flood coolant advised for walls below 3 mm. Consider roughing in stages for precision parts to manage residual stress release.

## Typical Applications

Shipbuilding and marine structures, offshore components, pressure vessels, cryogenic storage, military armour, bridge components, chemical processing equipment.