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Alumina vs. R05240 Alloy

Alumina and R05240 alloy belong to fundamentally different material chemistries. Alumina is a ceramic material, while R05240 alloy is a metal. Therefore, their performance will be even more dissimilar than would be suggested by the difference in properties. There are 11 material properties with values for both materials. Properties with values for just one material (22, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is alumina and the bottom bar is R05240 alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220 to 370
150
Poisson's Ratio 0.22 to 0.24
0.36
Tensile Strength: Ultimate (UTS), MPa 210 to 290
270

Thermal Properties

Specific Heat Capacity, J/kg-K 870 to 940
190
Thermal Expansion, µm/m-K 6.7 to 8.2
6.8

Otherwise Unclassified Properties

Density, g/cm3 3.4 to 4.1
14

Common Calculations

Stiffness to Weight: Axial, points 35 to 53
6.3
Stiffness to Weight: Bending, points 57 to 62
13
Strength to Weight: Axial, points 14 to 23
5.4
Strength to Weight: Bending, points 19 to 28
6.8
Thermal Shock Resistance, points 4.9 to 14
18