7075 Aluminum vs. Mullite
7075 aluminum and mullite belong to fundamentally different material chemistries. 7075 aluminum is a metal, while mullite is a ceramic material. 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 (27, in this case) are not shown.
For each property being compared, the top bar is 7075 aluminum and the bottom bar is mullite.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 70 | |
| 110 to 170 |
| Poisson's Ratio | 0.32 | |
| 0.25 |
| Tensile Strength: Ultimate (UTS), MPa | 240 to 590 | |
| 160 |
Thermal Properties
| Maximum Temperature: Mechanical, °C | 200 | |
| 1680 |
| Specific Heat Capacity, J/kg-K | 870 | |
| 950 |
| Thermal Conductivity, W/m-K | 130 | |
| 3.5 to 11 |
| Thermal Expansion, µm/m-K | 23 | |
| 5.8 |
Otherwise Unclassified Properties
| Density, g/cm3 | 3.0 | |
| 2.7 to 3.0 |
Common Calculations
| Stiffness to Weight: Axial, points | 13 | |
| 22 to 31 |
| Stiffness to Weight: Bending, points | 46 | |
| 58 to 62 |
| Strength to Weight: Axial, points | 22 to 54 | |
| 15 to 17 |
| Strength to Weight: Bending, points | 28 to 52 | |
| 22 to 24 |
| Thermal Diffusivity, mm2/s | 50 | |
| 1.4 to 3.7 |
| Thermal Shock Resistance, points | 10 to 25 | |
| 12 to 19 |