AlZn5.5Mg1.5 (EN AW 7021) – The High-Strength Aluminum Alloy for Maximum Demands
The aluminum alloy AlZn5.5Mg1.5, also known as EN AW 7021, is one of the strongest aluminum alloys processed industrially. It impresses with its high tensile and yield strength, very good dimensional stability and excellent machinability – an ideal choice for stressed precision components that must meet the highest demands.
What is EN AW 7021 / AlZn5.5Mg1.5?
EN AW 7021 belongs to the group of aluminum-zinc-magnesium alloys (7000 series) and is particularly suitable for applications where high mechanical load capacity and precise dimensional accuracy are required.
Thanks to its thermal hardenability (e.g., T6 condition), the alloy can be specifically used for technical applications with the highest strength requirements.
Chemical Composition (typical)
| Element | Share (%) |
|---|---|
| Zinc (Zn) | 4.5 – 6.5 |
| Magnesium (Mg) | 1.2 – 2.0 |
| Copper (Cu) | 0.2 – 0.8 |
| Manganese (Mn) | 0.1 – 0.5 |
| Aluminum (Al) | Remainder |
The combination of zinc and magnesium ensures extreme strength and strength stability – even under dynamic loads.
Properties of EN AW 7021 at a glance
- Very high strength – surpasses many other Al alloys
- Good machinability – ideal for CNC milling and precision parts
- Dimensionally stable even with large components – low tendency to warp
- Limited weldability – better to screw or mechanically join
- Moderate corrosion resistance – combine with protective coating if necessary
Mechanical Properties (T6 condition)
| Property | Typical Value |
|---|---|
| Tensile strength | 320 - 380 N/sqmm |
| Yield strength | 290 - 340 N/sqmm |
| Hardness | 110 - 120 Brinell |
| Thermal conductivity | 1.2 - 1.55 W/cm°C |
These values make EN AW 7021 an excellent alternative to steel in many lightweight construction projects.
Typical applications of AlZn5.5Mg1.5 (EN AW 7021)
This alloy is particularly suitable for components with high mechanical stress and high precision:
- Aerospace: Structural components with highest dimensional accuracy
- Mechanical engineering: Fixtures, housings, highly stressed supports
- Automotive engineering: Axle parts, brackets, lightweight components
- Mold and tool making: Plates, supports, fasteners
- Precision machining: Machine components with tight tolerances
EN AW 7021 compared to other alloys
| Feature | EN AW 7021 | EN AW 6082 | EN AW 7075 |
|---|---|---|---|
| Strength | ⭐⭐⭐⭐⭐ | ⭐⭐⭐⭐ | ⭐⭐⭐⭐⭐ |
| Dimensional stability | ⭐⭐⭐⭐⭐ | ⭐⭐⭐ | ⭐⭐⭐⭐ |
| Weldability | ⭐ | ⭐⭐⭐⭐ | ⭐ |
| Machinability | ⭐⭐⭐⭐ | ⭐⭐⭐ | ⭐⭐⭐⭐ |
| Corrosion protection | ⭐⭐ | ⭐⭐⭐⭐ | ⭐⭐ |
Conclusion: When it comes to high performance, dimensional accuracy, and strength, EN AW 7021 is a top choice.
What products made of EN AW 7021 are available at alu-verkauf.de?
On alu-verkauf.de you will find the following products made of EN AW 7021:
- Face-milled aluminum plates – extremely dimensionally accurate, ready for immediate use
- Custom-cut blanks – individually configurable
- Aluminum plates in various thicknesses – for tool making & mechanical engineering
- High-strength semi-finished products – for load-bearing and precision components
All products can be easily configured and ordered online – ideal for industry, technology, and trade.
Conclusion: EN AW 7021 – Aluminum for the highest technical demands
If you need an aluminum alloy with highest strength, perfect dimensional stability, and excellent machinability, AlZn5.5Mg1.5 (EN AW 7021) is the right choice. It combines the advantages of light metal with load capacity close to steel – ideal for high-end applications in technology, construction, and aerospace.
Order EN AW 7021 online now
Find high-quality aluminum plates and blanks made of EN AW 7021 now at alu-verkauf.de – precise, delivered quickly, and absolutely high-performance.
