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7075 Aluminum vs. C-820 Magnesia Ceramic

7075 aluminum and C-820 magnesia ceramic belong to fundamentally different material chemistries. 7075 aluminum is a metal, while C-820 magnesia ceramic is a ceramic material. Therefore, their performance will be even more dissimilar than would be suggested by the difference in properties. There are 8 material properties with values for both materials. Properties with values for just one material (27, in this case) are not shown.

For each property being compared, the top bar is 7075 aluminum and the bottom bar is C-820 magnesia ceramic.

Metric UnitsUS Customary Units

Material Properties

Density, g/cm3 3.0
2.7
Elastic (Young's, Tensile) Modulus, GPa 70
100
Specific Heat Capacity, J/kg-K 870
950
Stiffness to Weight: Axial, points 13
21
Stiffness to Weight: Bending, points 46
58
Thermal Conductivity, W/m-K 130
8.0
Thermal Diffusivity, mm2/s 50
3.1
Thermal Expansion, µm/m-K 23
11