AlMg4.5Mn (EN AW 5083) – The high-strength aluminum alloy for load-bearing structures
The aluminum alloy AlMg4.5Mn, known as EN AW 5083, is one of the strongest non-heat-treatable aluminum alloys. It combines excellent corrosion resistance with high strength and very good weldability – an ideal material for shipbuilding, vehicle manufacturing, pressure vessel construction, and mechanical plant engineering.
What is EN AW 5083 / AlMg4.5Mn?
EN AW 5083 is an aluminum-magnesium-manganese alloy with a particularly high magnesium content of about 4.0–4.9%. This gives the alloy its enormous mechanical load-bearing capacity and corrosion resistance – even in saline or industrial atmospheres. Furthermore, it meets many requirements according to DIN EN 573, 485, and 515.
Chemical Composition (typical)
| Element | Share (%) |
|---|---|
| Magnesium (Mg) | 4.0 – 4.9 |
| Manganese (Mn) | 0.4 – 1.0 |
| Iron (Fe) | max. 0.4 |
| Silicon (Si) | max. 0.4 |
| Chromium (Cr) | 0.05 – 0.25 |
| Aluminum (Al) | Rest |
Properties & Advantages of EN AW 5083
- High strength – even in the soft state, higher than many other Al alloys
- Excellent corrosion resistance – ideal for seawater and industrial applications
- Excellent weldability – no risk of cracking, no significant reduction in strength
- Good machinability – especially in the H111 condition
- Non-heat-treatable, but work-hardenable – for targeted adjustment of mechanical properties
Mechanical Characteristics (depending on condition H111 / H321)
| Property | Value Range |
|---|---|
| Tensile Strength | 275 – 315 N/mm² |
| Yield Strength | 125 – 180 N/mm² |
| Hardness | 70 – 100 Brinell |
| Thermal Conductivity | approx. 1.1 W/cm °C |
| Corrosion Behavior | Very good - also against seawater |
Typical Applications of AlMg4.5Mn (EN AW 5083)
The combination of strength, corrosion protection, and weldability makes EN AW 5083 the first choice in many industries:
- Shipbuilding: Hulls, decks, frames
- Vehicle construction: Trailers, superstructures, loading areas
- Machinery and plant engineering: Supporting structures, housings
- Pressure vessel construction: Boilers, tanks, silos
- Offshore & environmental technology: Structures with permanent moisture exposure
EN AW 5083 compared to other aluminum alloys
| Feature | EN AW 5083 | EN AW 5754 | EN AW 6082 |
|---|---|---|---|
| Strength | ⭐⭐⭐⭐ | ⭐⭐ | ⭐⭐⭐⭐ |
| Corrosion protection | ⭐⭐⭐⭐⭐ | ⭐⭐⭐⭐ | ⭐⭐⭐ |
| Weldability | ⭐⭐⭐⭐⭐ | ⭐⭐⭐⭐ | ⭐⭐ |
| Formability | ⭐⭐ | ⭐⭐⭐⭐ | ⭐⭐ |
Conclusion: EN AW 5083 is unbeatable when high strength and corrosion resistance are required – especially for load-bearing structures.
Products made of EN AW 5083 at alu-verkauf.de
At alu-verkauf.de, you will find the following products made of EN AW 5083:
- Aluminum plates & sheets – in many thicknesses and formats
- Custom cuts – configurable to size
- Precision-milled plates – high dimensional accuracy for mechanical engineering
- Anodizable versions – for additional surface finishing
- Ideal for industrial customers, workshops, and metal construction.
Conclusion: AlMg4.5Mn / EN AW 5083 – The reliable choice for strong applications
If you are looking for a robust, seawater-resistant, and load-bearing aluminum alloy, EN AW 5083 (AlMg4.5Mn) is exactly right. Whether in shipbuilding, commercial vehicle construction, or for load-bearing machine components – this alloy delivers durability and safety at the highest level.
Discover high-quality aluminum plates and custom cuts made of EN AW 5083 – quickly delivered, precisely to size, and optimal for your projects!
