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Alumina vs. 50Cr-50Ni Alloy

Alumina and 50Cr-50Ni alloy belong to fundamentally different material chemistries. Alumina is a ceramic material, while 50Cr-50Ni 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 (25, 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 50Cr-50Ni alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220 to 370
210
Poisson's Ratio 0.22 to 0.24
0.26
Tensile Strength: Ultimate (UTS), MPa 210 to 290
620

Thermal Properties

Specific Heat Capacity, J/kg-K 870 to 940
490
Thermal Expansion, µm/m-K 6.7 to 8.2
15

Otherwise Unclassified Properties

Density, g/cm3 3.4 to 4.1
8.0

Common Calculations

Stiffness to Weight: Axial, points 35 to 53
15
Stiffness to Weight: Bending, points 57 to 62
25
Strength to Weight: Axial, points 14 to 23
21
Strength to Weight: Bending, points 19 to 28
20
Thermal Shock Resistance, points 4.9 to 14
14