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Carbon-carbon vs. S24000 Stainless Steel

Carbon-carbon and S24000 stainless steel belong to fundamentally different material chemistries. Carbon-carbon is a ceramic material, while S24000 stainless steel is a metal. Therefore, their performance will be even more dissimilar than would be suggested by the difference in properties. There are 14 material properties with values for both materials. Properties with values for just one material (23, 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 S24000 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 95
200
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 36
77
Tensile Strength: Ultimate (UTS), MPa 19
770

Thermal Properties

Maximum Temperature: Corrosion, °C 350
410
Maximum Temperature: Mechanical, °C 2400
910
Specific Heat Capacity, J/kg-K 760
480
Thermal Expansion, µm/m-K 4.0
17

Otherwise Unclassified Properties

Density, g/cm3 1.7
7.6

Common Calculations

Stiffness to Weight: Axial, points 31
14
Stiffness to Weight: Bending, points 89
25
Strength to Weight: Axial, points 3.0
28
Strength to Weight: Bending, points 9.1
24
Thermal Shock Resistance, points 3.5
16