EN AW-7149 · AlZn8MgCu(A)
The controlled-purity successor to 7049: tighter iron and silicon limits raise fracture toughness while keeping the T73-condition strength that made 7049 a landing-gear standard.
Material Data
Composition and physical properties
| Element | Limit / range |
|---|---|
| Si | ≤ 0.15 |
| Fe | ≤ 0.20 |
| Cu | 1.2 – 1.9 |
| Mn | ≤ 0.20 |
| Mg | 2.0 – 2.9 |
| Zn | 7.2 – 8.2 |
| Cr | 0.10 – 0.22 |
| 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) | 23.4 µm/m·K |
| Elastic modulus | 72 GPa |
| Thermal conductivity | 150 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) |
|---|---|---|---|---|
| T73511 | 460 | 530 | 8 | 135 |
Designations & Standards
How this alloy appears on drawings
| System | Designation |
|---|---|
| ISO / EN designation | AlZn8MgCu(A) |
| EN numeric | EN AW-7149 |
| UNS | A97149 |
| Werkstoff-Nr. | — |
| Common product standards | AMS 4343 · UNS A97149 |
Supply Program
Available from Lipol as
| Product form | Standard | Alloy | Temper | Category |
|---|---|---|---|---|
| Tube / Profile / Extrusion | AMS 4343 | 7149 | T73511 | Aerospace & Defense |
Additional tempers, forms and specifications available on request — the table shows the standard program.
Applications
Where EN AW-7149 is the right answer
- Landing-gear components
- High-integrity extrusions
- Airframe fittings
Specifying EN AW-7149?
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-7149 is the right alloy?
Describe the application — load, environment, joining, finishing — and our engineers will confirm the choice or propose a better-value alternative.