7075 Aluminum vs. Carbon-carbon
7075 aluminum and carbon-carbon belong to fundamentally different material chemistries. 7075 aluminum is a metal, while carbon-carbon is a ceramic material. Therefore, their performance will be even more dissimilar than would be suggested by the difference in properties. There are 17 material properties with values for both materials. Properties with values for just one material (17, in this case) are not shown.
For each property being compared, the top bar is 7075 aluminum and the bottom bar is carbon-carbon.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 70 | |
| 95 |
| Poisson's Ratio | 0.32 | |
| 0.32 |
| Shear Modulus, GPa | 26 | |
| 36 |
| Tensile Strength: Ultimate (UTS), MPa | 240 to 590 | |
| 19 |
Thermal Properties
| Maximum Temperature: Mechanical, °C | 200 | |
| 2400 |
| Specific Heat Capacity, J/kg-K | 870 | |
| 760 |
| Thermal Conductivity, W/m-K | 130 | |
| 40 |
| Thermal Expansion, µm/m-K | 23 | |
| 4.0 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 33 | |
| 0.090 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 98 | |
| 0.48 |
Otherwise Unclassified Properties
| Density, g/cm3 | 3.0 | |
| 1.7 |
Common Calculations
| Stiffness to Weight: Axial, points | 13 | |
| 31 |
| Stiffness to Weight: Bending, points | 46 | |
| 89 |
| Strength to Weight: Axial, points | 22 to 54 | |
| 3.0 |
| Strength to Weight: Bending, points | 28 to 52 | |
| 9.1 |
| Thermal Diffusivity, mm2/s | 50 | |
| 31 |
| Thermal Shock Resistance, points | 10 to 25 | |
| 3.5 |