EN AW-7475 · AlZn5.5MgCu (high toughness)
The fracture-toughness champion of the 7000 series: ultra-clean chemistry gives roughly 40% more toughness than 7075 at comparable strength — the fuselage-skin alloy for damage-tolerant designs.
Material Data
Composition and physical properties
| Element | Limit / range |
|---|---|
| Si | ≤ 0.10 |
| Fe | ≤ 0.12 |
| Cu | 1.2 – 1.9 |
| Mn | ≤ 0.06 |
| Mg | 1.9 – 2.6 |
| Zn | 5.2 – 6.2 |
| Cr | 0.18 – 0.25 |
| Ti | ≤ 0.06 |
| Al | balance |
Limits per EN 573-3 / applicable registration. The governing specification on your order prevails.
| Property | Value |
|---|---|
| Density | 2.81 g/cm³ |
| Melting range | 477 – 635 °C |
| Thermal expansion (20–100 °C) | 23.2 µm/m·K |
| Elastic modulus | 70.3 GPa |
| Thermal conductivity | 145 W/m·K |
| Electrical conductivity | 35 % 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) |
|---|---|---|---|---|
| T651 | 490 | 560 | 10 | 150 |
| T7351 | 435 | 505 | 13 | 135 |
| T7651 | 460 | 535 | 11 | 140 |
| Alclad T61 (sheet) | 460 | 525 | 11 | — |
| Alclad T761 (sheet) | 420 | 490 | 12 | — |
Designations & Standards
How this alloy appears on drawings
| System | Designation |
|---|---|
| ISO / EN designation | AlZn5.5MgCu (high toughness) |
| EN numeric | EN AW-7475 |
| UNS | A97475 |
| Werkstoff-Nr. | — |
| Common product standards | AMS 4089, AMS 4090, AMS 4100, AMS 4202, AMS 4207 · ASTM B209 · UNS A97475 |
Supply Program
Available from Lipol as
| Product form | Standard | Alloy | Temper | Category |
|---|---|---|---|---|
| Plate | AMS 4202 | 7475 | T7351 | Aerospace & Defense |
| Plate | AMS 4089 | 7475 | T7651 | Aerospace & Defense |
| Sheet | AMS 4207 | 7475 Alclad | T61 | Aerospace & Defense |
| Sheet | AMS 4100 | 7475 Alclad | T761 | Aerospace & Defense |
| Plate | AMS 4090 | 7475 | T651 | Machinery, Automotive & Mold |
Additional tempers, forms and specifications available on request — the table shows the standard program.
Applications
Where EN AW-7475 is the right answer
- Fuselage skins and bulkheads
- Wing skins requiring damage tolerance
- Fracture-critical machined parts
Specifying EN AW-7475?
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-7475 is the right alloy?
Describe the application — load, environment, joining, finishing — and our engineers will confirm the choice or propose a better-value alternative.