7050
UNS A97050
Description
Aluminum alloy 7050 is a heat-treatable alloy with zinc as main alloy element. The alloy is known as a commercial aerospace grade aluminum alloy combining high strength, high fatigue strength, high toughness, along with a high resistance to exfoliation and stress corrosion cracking. It has relatively poor weldability, and it is not recommended to use welding methods of brazing, gas shielded arc welding, or coated metal arc welding for joining. And it has poor cold workability, but can instead be machined. 7050 is particularly suited for heavy plate applications (3" to 6" thick) because it has less quench sensitivity compared to other aerospace aluminum alloys and can retain strength in thicker sections. Aluminum alloy 7050 plate is available in two tempers of T7651 (AMS 4201) and T7451 (AMS 4050).
Chemical Component
| Al | Zr | Fe | Cu | Mg | Mn | Zn | Ti | Cr | Si | Others |
|---|---|---|---|---|---|---|---|---|---|---|
| 87.3-90.3% | 0.08-0.15% | 0.15% max | 2.0-2.6% | 1.9-2.6% | 0.10% max | 5.7-6.7% | 0.06% max | 0.04% max | 0.12% max | 0.05% max (each) 0.15% max (total) |
Basic Information
| Items | 7050 |
|---|---|
| Catalog | ACAM-Al-A024 |
| Density | 2.70 g/cm3 |
| Specific Heat Capacity | 0.860 J/g-°C |
| Thermal Conductivity | 157 W/m-K |
| Modulus of Elasticity | 70-80 GPa |
| Poisson's Ratio | 0.33 |
| Melting Range | 494 °C |
Material Forms
Alfa Chemistry offers aluminum alloy 7050 in a variety of forms, including Plate, Extruded Wire, Wire, Rod and Bar.
Typical Mechanical Properties
| Materials | Temper | Thickness, in | Tensile Strength, ksi | Yield Strength, ksi | Elongation in 2", % |
|---|---|---|---|---|---|
| Alloy 7050 Plate (longitudinal) | T7451 | <2.0 | 74 | 64 | 10 |
| T7451 | 2.0-3.0 | 73 | 63 | 9 | |
| T7451 | 3.0-4.0 | 72 | 62 | 9 | |
| T7451 | 4.0-5.0 | 71 | 61 | 9 | |
| T7651 | 0.25-1.0 | 76 | 66 | 9 | |
| T7651 | 1.0-1.5 | 77 | 67 | 9 | |
| T7651 | 1.5-2.0 | 76 | 66 | 9 | |
| T7651 | 2.0-3.0 | 76 | 66 | 9 |
| Materials | Temper | Tensile Strength, ksi | Yield Strength, ksi | Elongation in 2", % |
|---|---|---|---|---|
| Alloy 7050 Bar (AMS 4340) | T76511 | 79 | 69 | 7 |
| Alloy 7050 Bar (AMS 4340) | T73511 | 70 | 60 | 8 |
| Alloy 7050 Bar (AMS 4342) | T74511 | 73 | 63 | 7 |
Specifications
AMS 4107:7050-T74 Die Forging
AMS 4108:7050-T7452 Hand Forgings
AMS 4201: 7050-T7651 Plate
AMS 4340: 7050-T76511 Extrusions
AMS 4341: 7050-T73511 Extrusions
AMS 4342: 7050-T74511 Extrusions
Extrustions / Part Numbers
BAC1506-43-7050T76511
BAC1510-1355-7050T76511
BAC1520-1397-7050T76511
Applications
Aluminum alloy 7050 is the premium choice aerospace aluminum for applications such as:
- Fuselage frames
- Bulkheads
- Wing skins
- Aerospace structures
- Commercial & military aircraft applications
* Technical data included herein should be used as a guideline only, and should not be construed as maximum or minimum values for specification or for final design, or for a particular use or application. The data may be revised anytime without notice.
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