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2024 Aluminum vs. Gallium Arsenide

2024 aluminum and gallium arsenide belong to fundamentally different material chemistries. 2024 aluminum is a metal, while gallium arsenide is a ceramic material. Therefore, their performance will be even more dissimilar than would be suggested by the difference in properties. There are 10 material properties with values for both materials. Properties with values for just one material (24, in this case) are not shown.

For each property being compared, the top bar is 2024 aluminum and the bottom bar is gallium arsenide.

Metric UnitsUS Customary Units

Material Properties

Density, g/cm3 3.0
5.3
Elastic (Young's, Tensile) Modulus, GPa 71
85
Melting Onset (Solidus), °C 500
1400
Poisson's Ratio 0.33
0.31
Specific Heat Capacity, J/kg-K 880
360
Stiffness to Weight: Axial, points 13
8.9
Stiffness to Weight: Bending, points 46
28
Thermal Conductivity, W/m-K 120
47
Thermal Diffusivity, mm2/s 46
25
Thermal Expansion, µm/m-K 23
5.6