EN AW-7079 · AlZn4Mg3Cu
A deep-hardening legacy alloy once favored for very thick forgings. Modern designs specify 7050/7010 instead for their better stress-corrosion resistance, but 7079 remains supplied against existing drawings.
Material Data
Composition and physical properties
| Element | Limit / range |
|---|---|
| Si | ≤ 0.30 |
| Fe | ≤ 0.40 |
| Cu | 0.40 – 0.8 |
| Mn | 0.10 – 0.30 |
| Mg | 2.9 – 3.7 |
| Zn | 3.8 – 4.8 |
| Cr | 0.10 – 0.25 |
| Al | balance |
Limits per EN 573-3 / applicable registration. The governing specification on your order prevails.
| Property | Value |
|---|---|
| Density | 2.74 g/cm³ |
| Melting range | 482 – 638 °C |
| Thermal expansion (20–100 °C) | 24.7 µm/m·K |
| Elastic modulus | 71.7 GPa |
| Thermal conductivity | 125 W/m·K |
| Electrical conductivity | 32 % 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) |
|---|---|---|---|---|
| T6 / T651 | 470 | 540 | 10 | 145 |
Designations & Standards
How this alloy appears on drawings
| System | Designation |
|---|---|
| ISO / EN designation | AlZn4Mg3Cu |
| EN numeric | EN AW-7079 |
| UNS | A97079 |
| Werkstoff-Nr. | — |
| Common product standards | AMS 4024 · ASTM B221 · UNS A97079 · legacy specification |
Supply Program
Available from Lipol as
| Product form | Standard | Alloy | Temper | Category |
|---|---|---|---|---|
| Bar / Flat | ASTM B221 | 7079 | T6 | Aerospace & Defense |
| Tube / Profile / Extrusion | AMS 4024 | 7079 | T651 | Aerospace & Defense |
Additional tempers, forms and specifications available on request — the table shows the standard program.
Applications
Where EN AW-7079 is the right answer
- Legacy thick-section forgings
- Repair and spares programs
- Existing tooling drawings
Specifying EN AW-7079?
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-7079 is the right alloy?
Describe the application — load, environment, joining, finishing — and our engineers will confirm the choice or propose a better-value alternative.