EN AW-7040 · AlZn6Mg2Cu2
A modern thick-plate alloy developed for very heavy airframe sections — engineered to hold strength, toughness and low residual stress through plates well over 150 mm, where legacy alloys fall off sharply.
Material Data
Composition and physical properties
| Element | Limit / range |
|---|---|
| Si | ≤ 0.10 |
| Fe | ≤ 0.13 |
| Cu | 1.5 – 2.3 |
| Mn | ≤ 0.04 |
| Mg | 1.7 – 2.4 |
| Zn | 5.7 – 6.7 |
| Zr | 0.05 – 0.12 |
| Al | balance |
Limits per EN 573-3 / applicable registration. The governing specification on your order prevails.
| Property | Value |
|---|---|
| Density | 2.82 g/cm³ |
| Melting range | 480 – 630 °C |
| Thermal expansion (20–100 °C) | 22.5 µm/m·K |
| Elastic modulus | 71 GPa |
| Thermal conductivity | 150 W/m·K |
| Electrical conductivity | 34 % 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) |
|---|---|---|---|---|
| T7451 | 470 | 525 | 9 | 145 |
| T7651 | 500 | 550 | 8 | 150 |
Designations & Standards
How this alloy appears on drawings
| System | Designation |
|---|---|
| ISO / EN designation | AlZn6Mg2Cu2 |
| EN numeric | EN AW-7040 |
| UNS | A97040 |
| Werkstoff-Nr. | — |
| Common product standards | AMS 4211 · AIMS 03-02-023 (Airbus) · EN 573-3 |
Supply Program
Available from Lipol as
| Product form | Standard | Alloy | Temper | Category |
|---|---|---|---|---|
| Plate | AMS 4211 | 7040 | T7451 | Aerospace & Defense |
| Plate | AIMS 03-02-023 | 7040 | T7651 | Aerospace & Defense |
Additional tempers, forms and specifications available on request — the table shows the standard program.
Applications
Where EN AW-7040 is the right answer
- Wing spars and rib plates over 100 mm
- Integrally machined aerostructures
- Large tooling with deep machining
Specifying EN AW-7040?
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-7040 is the right alloy?
Describe the application — load, environment, joining, finishing — and our engineers will confirm the choice or propose a better-value alternative.