Aluminum alloys
7050
Spécifications
EU
Al Zn6CuMgZr
USA
UNS: A97050
ISO Symbol
Al Zn6CuMgZr
WL
3.4144
Composition
Al
Base
Cu
2.3
Mg
2.30
Zr
0.12
Zn
6.2
Applications
• Closed-die forgings and large forged bars for the aerospace industry.
• This alloy has been specifically designed for structural components subject to high fatigue stress and the risk of corrosion.
Characteristics
• This alloy used in the over-aged T74 condition achieves a good balance between mechanical properties (strength, toughness and fatigue) and stress corrosion resistance.
• In the over-aged T76 condition, it is particularly resistant to exfoliation corrosion.
• Its good hardenability makes it suitable for producing thick parts.
Mechanical properties
| Heat treatment |
UTS (N/mm²) |
0,2% YS (N/mm²) |
A (%) |
|---|---|---|---|
| T 7452 condition thickness 150/175 mm | > 469 | > 400 | > 9 |
| T 74 condition thickness 100/125 mm | > 483 | > 414 | > 7 |
Key to heat treatment symbols
| Solution treated | H | Annealed | R |
|---|---|---|---|
| Thermo-mechanical treatment | TM | Quenched and tempered | T+RV |
| Sub-zero treatment | F | Solution treated and aged | H+V |