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Carbon-carbon vs. 50Cr-50Ni Alloy

Carbon-carbon and 50Cr-50Ni alloy belong to fundamentally different material chemistries. Carbon-carbon 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 12 material properties with values for both materials. Properties with values for just one material (17, 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 carbon-carbon and the bottom bar is 50Cr-50Ni alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 95
210
Poisson's Ratio 0.32
0.26
Shear Modulus, GPa 36
84
Tensile Strength: Ultimate (UTS), MPa 19
620

Thermal Properties

Specific Heat Capacity, J/kg-K 760
490
Thermal Expansion, µm/m-K 4.0
15

Otherwise Unclassified Properties

Density, g/cm3 1.7
8.0

Common Calculations

Stiffness to Weight: Axial, points 31
15
Stiffness to Weight: Bending, points 89
25
Strength to Weight: Axial, points 3.0
21
Strength to Weight: Bending, points 9.1
20
Thermal Shock Resistance, points 3.5
14