EN AW-7175 · AlZn5.5MgCu(B)
Premium-purity 7075 for forging: cleaner metal means higher toughness and fatigue life at identical chemistry class — the grade specification writers pick when 7075 forgings must not fail.
Material Data
Composition and physical properties
| Element | Limit / range |
|---|---|
| Si | ≤ 0.15 |
| Fe | ≤ 0.20 |
| Cu | 1.2 – 2.0 |
| Mn | ≤ 0.10 |
| Mg | 2.1 – 2.9 |
| Zn | 5.1 – 6.1 |
| Cr | 0.18 – 0.28 |
| Al | balance |
Limits per EN 573-3 / applicable registration. The governing specification on your order prevails.
| Property | Value |
|---|---|
| Density | 2.80 g/cm³ |
| Melting range | 477 – 635 °C |
| Thermal expansion (20–100 °C) | 23.4 µm/m·K |
| Elastic modulus | 72 GPa |
| Thermal conductivity | 142 W/m·K |
| Electrical conductivity | 36 % 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) |
|---|---|---|---|---|
| T7351 / T73511 | 435 | 505 | 12 | 135 |
| T66 (forgings) | 525 | 590 | 10 | 155 |
Designations & Standards
How this alloy appears on drawings
| System | Designation |
|---|---|
| ISO / EN designation | AlZn5.5MgCu(B) |
| EN numeric | EN AW-7175 |
| UNS | A97175 |
| Werkstoff-Nr. | — |
| Common product standards | AMS 4344 · EN 2512 · UNS A97175 |
Supply Program
Available from Lipol as
| Product form | Standard | Alloy | Temper | Category |
|---|---|---|---|---|
| Bar / Flat | AMS 4344 | 7175 | T73511 | Aerospace & Defense |
| Plate | EN 2512 | 7175 | T7351 | General Industry |
Additional tempers, forms and specifications available on request — the table shows the standard program.
Applications
Where EN AW-7175 is the right answer
- Critical aerospace forgings
- Helicopter rotor parts
- High-fatigue structural fittings
Specifying EN AW-7175?
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-7175 is the right alloy?
Describe the application — load, environment, joining, finishing — and our engineers will confirm the choice or propose a better-value alternative.