EN AW-7449 · AlZn8Mg2Cu
One of the highest-strength plate alloys ever certified for airframes: a zinc-rich composition aged along the T79 path to combine near-peak strength with acceptable damage tolerance for upper-wing service.
Material Data
Composition and physical properties
| Element | Limit / range |
|---|---|
| Si | ≤ 0.12 |
| Fe | ≤ 0.15 |
| Cu | 1.4 – 2.1 |
| Mn | ≤ 0.20 |
| Mg | 1.8 – 2.7 |
| Zn | 7.5 – 8.7 |
| Zr + Ti | ≤ 0.25 |
| Al | balance |
Limits per EN 573-3 / applicable registration. The governing specification on your order prevails.
| Property | Value |
|---|---|
| Density | 2.84 g/cm³ |
| Melting range | 480 – 630 °C |
| Thermal expansion (20–100 °C) | 23.0 µm/m·K |
| Elastic modulus | 72 GPa |
| Thermal conductivity | 130 W/m·K |
| Electrical conductivity | 31 % IACS |
Strength Data
Mechanical properties by temper
Typical room-temperature values for orientation. Design minimums depend on product form, thickness and the governing specification — request the applicable table with your inquiry.
| Temper | Yield strength (MPa) | Tensile strength (MPa) | Elongation (%) | Hardness (HB) |
|---|---|---|---|---|
| T7951 | 545 | 605 | 8 | 162 |
Designations & Standards
How this alloy appears on drawings
| System | Designation |
|---|---|
| ISO / EN designation | AlZn8Mg2Cu |
| EN numeric | EN AW-7449 |
| UNS | A97449 |
| Werkstoff-Nr. | — |
| Common product standards | AMS 4299 · EN 573-3 · AIMS heritage (Airbus) |
Supply Program
Available from Lipol as
| Product form | Standard | Alloy | Temper | Category |
|---|---|---|---|---|
| Plate | AMS 4299 | 7449 | T7951 | Aerospace & Defense |
Additional tempers, forms and specifications available on request — the table shows the standard program.
Applications
Where EN AW-7449 is the right answer
- Upper wing covers of large transports
- High-compression plate structure
- Weight-critical machined components
Specifying EN AW-7449?
State the temper, product form, dimensions and governing standard from the tables above, and we will confirm availability with a firm price and delivery date — typically within one business day.
Request a QuoteMaterial Engineering
Not sure EN AW-7449 is the right alloy?
Describe the application — load, environment, joining, finishing — and our engineers will confirm the choice or propose a better-value alternative.