Material datasheet · Aerospace aluminum (Cu-Mg)
Aluminum 2024-T3
UNS A92024 · T3 — solution treated, cold worked, naturally aged
Classic aircraft skin alloy. Outstanding fatigue resistance from copper alloying.
Chemical composition
Nominal % by weight.
| Element | % by wt |
|---|---|
| Al | Bal. |
| Cu | 3.8–4.9 |
| Mg | 1.2–1.8 |
| Mn | 0.3–0.9 |
Applicable specifications
AMS / ASTM / MIL.
- AMS 4037 (sheet)
- AMS-QQ-A-250/4
- ASTM B209
- AMS 4120 (bar)
Machining guidance
CNC parameters and tooling.
Polished carbide; sharp positive rake
Outstanding fatigue resistance. Watch for galvanic corrosion when contacting steel.
Stock & cost
Forms and Q1 2026 pricing.
- Alclad (rolled-on pure aluminum)
- Anodize (poor color)
- Alodine
- Paint primer required for service
Typical applications
Where 2024-T3 is the right pick.
- Aircraft fuselage skins
- Wing structures
- Precision bulkheads
- High-fatigue parts
Alternative materials
Substitute or upgrade options.
- 7075 (higher strength, lower fatigue)
- 6061 (general)
- Aluminum-lithium 2099 (advanced)
True Precision Machining · Buellton, CA
Machine your part in 2024-T3.
5-axis CNC · ISO 9001 · AS9100 · ITAR · CMMC-compliant · DFARS-compliant supply chain. AS9102 FAI on aerospace.
Technically reviewed by the True Precision Machining engineering team · Last reviewed June 2026
Standards referenced: AMS 4037 (sheet), AMS-QQ-A-250/4, ASTM B209, AMS 4120 (bar)
Keep exploring
Related tools & references
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SFM, RPM, and feed rate for this material.
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Estimate part weight from 2024-T3 stock.
How it stacks up against its alternatives.
Aerospace specs that call out this alloy.