Silicon Carbide vs. Graphite
Both silicon carbide and graphite are non-oxide engineering ceramics. There are 13 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.
For each property being compared, the top bar is silicon carbide and the bottom bar is graphite.
Metric UnitsUS Customary Units
Mechanical Properties
| Compressive (Crushing) Strength, MPa | 2780 to 3900 | |
| 90 |
| Elastic (Young's, Tensile) Modulus, GPa | 370 to 490 | |
| 21 |
| Flexural Strength, MPa | 410 to 600 | |
| 80 |
| Tensile Strength: Ultimate (UTS), MPa | 210 to 370 | |
| 18 |
Thermal Properties
| Maximum Temperature: Mechanical, °C | 500 to 1590 | |
| 220 |
| Thermal Conductivity, W/m-K | 120 to 170 | |
| 6.0 |
| Thermal Expansion, µm/m-K | 4.0 to 4.5 | |
| 4.9 |
Otherwise Unclassified Properties
| Density, g/cm3 | 3.0 to 3.2 | |
| 1.8 |
Common Calculations
| Stiffness to Weight: Axial, points | 69 to 84 | |
| 6.7 |
| Stiffness to Weight: Bending, points | 79 to 82 | |
| 53 |
| Strength to Weight: Axial, points | 18 to 34 | |
| 2.9 |
| Strength to Weight: Bending, points | 24 to 38 | |
| 8.7 |
| Thermal Shock Resistance, points | 6.9 to 18 | |
| 12 |