Metals & alloys · Aluminium alloys
2024-T3 aluminium alloy
A high-strength Al–Cu–Mg sheet alloy widely used in aircraft structures where fatigue performance and damage tolerance outweigh general corrosion and weldability limits.
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01
Overview
- Material class
- Metals & alloys
- Category
- Aluminium alloys
- Family
- 2xxx Aluminium Alloy
- Product forms
- Sheet/plate, Bar/rod, Casting
Composition
| Constituent | Min | Max | Typical | Note |
|---|---|---|---|---|
| Cu | 3.8 | 4.9 | 4.4 | |
| Mg | 1.2 | 1.8 | 1.5 | |
| Mn | 0.3 | 0.9 | 0.6 | |
| Si | 0.5 | 0.2 | ||
| Fe | 0.5 | 0.2 | ||
| Al | Balance |
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Properties and conditions
Engineering properties
| Property | Value | Unit | Condition |
|---|---|---|---|
| Density | 2.78 | g/cm³ | Representative; verify product form and condition |
| Elastic modulus | 73.1 | GPa | Representative; verify product form and condition |
| Yield strength | ~325 | MPa | T3 sheet |
| Tensile strength | ~470 | MPa | T3 sheet |
| Elongation | 12–20 | % | Representative; verify product form and condition |
| Thermal conductivity | ~121 | W/m·K | Representative; verify product form and condition |
Conditions
T3
Solution heat treated, cold worked and naturally aged.
T351
T3-type condition with stress relief by stretching.
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Processing and use
Processing
- Product form, thermal history and manufacturing route materially affect performance.
Applications
- Aircraft skins
- Wing structures
- Riveted structures
Selection considerations
- Poor fusion weldability; mechanically fastened and bonded structures are common.
- Cladding or surface protection is often used for corrosion control.
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04
Standards and related materials
Standards and designations
| System | Designation | Note |
|---|---|---|
| AA | 2024-T3 | |
| UNS | A92024 | |
| AMS | 4037 / 4041 | product dependent |
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Sources and context
Sources
- The Aluminum Association alloy designation systemExisting reference
- MMPDS / aerospace product dataExisting reference
- NASA materials selection resourcesApplication 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.