Carbon-carbon vs. R31537 Cobalt
Carbon-carbon and R31537 cobalt belong to fundamentally different material chemistries. Carbon-carbon is a ceramic material, while R31537 cobalt is a metal. Therefore, their performance will be even more dissimilar than would be suggested by the difference in properties. There are 16 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 R31537 cobalt.
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 95 | |
| 220 |
| Poisson's Ratio | 0.32 | |
| 0.29 |
| Shear Modulus, GPa | 36 | |
| 87 |
| Tensile Strength: Ultimate (UTS), MPa | 19 | |
| 1000 to 1340 |
Thermal Properties
| Specific Heat Capacity, J/kg-K | 760 | |
| 450 |
| Thermal Conductivity, W/m-K | 40 | |
| 13 |
| Thermal Expansion, µm/m-K | 4.0 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 0.090 | |
| 2.0 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 0.48 | |
| 2.1 |
Otherwise Unclassified Properties
| Density, g/cm3 | 1.7 | |
| 8.4 |
Common Calculations
| Stiffness to Weight: Axial, points | 31 | |
| 15 |
| Stiffness to Weight: Bending, points | 89 | |
| 24 |
| Strength to Weight: Axial, points | 3.0 | |
| 33 to 44 |
| Strength to Weight: Bending, points | 9.1 | |
| 26 to 32 |
| Thermal Diffusivity, mm2/s | 31 | |
| 3.4 |
| Thermal Shock Resistance, points | 3.5 | |
| 24 to 32 |