2024-T3

UNS A92024 aluminium
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Cu-Mg precipitation-hardened aluminium with high strength and good fatigue resistance. The standard lower-wing skin alloy in commercial aircraft. Susceptible to corrosion without cladding.

Applicable Standards

  • AMS 2770
  • ASTM B209
  • AMS 2770
  • UNS A92024

Composition Ranges (wt %)

Element Min (%) Max (%) Typical Range
Al 90.7 94.7 ~92.7
Cu 3.8 4.9 ~4.35
Mg 1.2 1.8 ~1.5
Mn 0.3 0.9 ~0.6
Fe — 0.5 ~0.25
Si — 0.5 ~0.25
Zn — 0.25 ~0.12
Al 90.7–94.7% Cu 3.8–4.9% Mg 1.2–1.8% Mn 0.3–0.9% Fe 0.0–0.5% Si 0.0–0.5% Zn 0.0–0.25%

Typical Applications

  • Aircraft lower wing skins
  • Fuselage skins
  • Structural parts
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