Metals & alloys · Aluminium alloys
7050-T7451 aluminium alloy
A high-strength, thick-section Al–Zn–Mg–Cu aerospace plate alloy developed for improved stress-corrosion resistance and through-thickness toughness relative to many 7075 products.
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01
Overview
- Material class
- Metals & alloys
- Category
- Aluminium alloys
- Family
- 7xxx Aluminium Alloy
- Product forms
- Sheet/plate, Bar/rod, Casting
Composition
| Constituent | Min | Max | Typical | Note |
|---|---|---|---|---|
| Zn | 5.7 | 6.7 | 6.2 | |
| Mg | 1.9 | 2.6 | 2.3 | |
| Cu | 2 | 2.6 | 2.3 | |
| Zr | 0.08 | 0.15 | 0.12 | |
| Fe | 0.15 | 0.08 | ||
| Al | Balance |
02
Properties and conditions
Engineering properties
| Property | Value | Unit | Condition |
|---|---|---|---|
| Density | 2.83 | g/cm³ | Representative; verify product form and condition |
| Elastic modulus | 71.7 | GPa | Representative; verify product form and condition |
| Yield strength | ~455–505 | MPa | T7451 plate |
| Tensile strength | ~510–570 | MPa | Representative; verify product form and condition |
| Elongation | 7–12 | % | Representative; verify product form and condition |
| Fracture toughness | high | product/thickness dependent |
Conditions
T7451
Overaged and stress-relieved plate condition.
T7651
Intermediate overage and stress-relieved condition.
03
Processing and use
Processing
- Product form, thermal history and manufacturing route materially affect performance.
Applications
- Wing spars
- Bulkheads
- Fuselage frames
- Thick machined structures
Selection considerations
- Use the current governing standard and supplier certification for design or procurement.
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04
Standards and related materials
Standards and designations
| System | Designation | Note |
|---|---|---|
| AA | 7050-T7451 | |
| UNS | A97050 | |
| AMS | 4050 | plate |
05
Sources and context
Sources
- MMPDS aerospace aluminium dataExisting reference
- The Aluminum Association 7xxx alloy dataExisting reference
- ASM International and public alloy designation referencesIdentity reference
Confirm the applicable specification, product form and condition before using values for design or procurement.
Supply and sustainability
Availability and lead time depend on grade, product form, certification and regional supply chain.
Segregated recovery and closed-loop recycling improve material efficiency where practical.