Aluminum 2025 Alloy (UNS A92025)

Topics Covered

Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties


Aluminium / aluminum 2000 series has copper as the key alloying element. When the alloys from this series are heat-treated, the mechanical properties are similar and/ or better than those of medium steel. Aluminium / aluminum 2025 alloy is a heat treatable wrought alloy.

The following datasheet will provide more details about aluminium / aluminum 2025 alloy.

Chemical Composition

The following table shows the chemical composition of aluminium / aluminum 2025-T6 alloy.

Element Content (%)
Aluminum, Al 90.9 - 95.2
Copper, Cu 3.9 - 5.0
Iron, Fe ≤ 1
Silicon, Si 0.50 - 1.2
Manganese, Mn 0.40 - 1.2
Zinc, Zn ≤ 0.25
Titanium, Ti ≤ 0.15
Chromium, Cr ≤ 0.10
Magnesium, Mg ≤ 0.050
Other (each) ≤ 0.050
Other (total) ≤ 0.15

Physical Properties

The physical properties of aluminium / aluminum 2025-T6 alloy are outlined in the following table.

Properties Metric Imperial
Density 2.81 g/cm³ 0.102 lb/in³
Melting point 521 - 641°C 970 - 1185°F

Mechanical Properties

The mechanical properties of aluminium / aluminum 2025-T6 alloy are tabulated below.

Properties Metric Imperial
Tensile strength 400 MPa 58000 psi
Yield strength 255 MPa 37000 psi
Elongation at break (@diameter 12.7 mm/0.500 in) 19% 19%
Poisson’s ratio 0.33 0.33
Elastic modulus 71.7 GPa 10400 ksi
Shear strength 241MPa 35000 psi
Hardness, Brinell (@load 500 kg; thickness 10.0 mm/1100 lb;0.394 in) 110 110
Hardness, Knoop (converted from Brinell hardness value) 138 138
Hardness, Rockwell A (converted from Brinell hardness value) 44.2 44.2
Hardness, Rockwell B (converted from Brinell hardness value) 69 69
Hardness, Vickers (converted from Brinell hardness value) 124 124

Thermal Properties

The thermal properties of aluminium / aluminum 2025-T6 alloy are tabulated below.

Properties Metric Imperial
Thermal expansion co-efficient (@20-100°C/68-212°F) 22.7µm/m°C 12.6 µin/in°F
Thermal conductivity 154 W/mK 1070 BTU in/hr.ft².°F


Aluminium / aluminum 2025 alloy is chiefly used in the following areas:

  • Aircraft structures and propellers
  • Automotive bodies
  • Screw fittings.

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