7075 Aluminum vs. Steatite
7075 aluminum and steatite belong to fundamentally different material chemistries. 7075 aluminum is a metal, while steatite 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 (26, in this case) are not shown.
For each property being compared, the top bar is 7075 aluminum and the bottom bar is steatite.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 70 | |
| 68 to 120 |
| Poisson's Ratio | 0.32 | |
| 0.23 |
| Tensile Strength: Ultimate (UTS), MPa | 240 to 590 | |
| 60 to 220 |
Thermal Properties
| Maximum Temperature: Mechanical, °C | 200 | |
| 750 to 1230 |
| Specific Heat Capacity, J/kg-K | 870 | |
| 850 to 860 |
| Thermal Conductivity, W/m-K | 130 | |
| 1.8 to 2.5 |
| Thermal Expansion, µm/m-K | 23 | |
| 7.0 to 9.0 |
Otherwise Unclassified Properties
| Density, g/cm3 | 3.0 | |
| 1.9 to 2.8 |
Common Calculations
| Stiffness to Weight: Axial, points | 13 | |
| 14 to 32 |
| Stiffness to Weight: Bending, points | 46 | |
| 52 to 83 |
| Strength to Weight: Axial, points | 22 to 54 | |
| 6.4 to 32 |
| Strength to Weight: Bending, points | 28 to 52 | |
| 13 to 42 |
| Thermal Diffusivity, mm2/s | 50 | |
| 0.79 to 1.1 |
| Thermal Shock Resistance, points | 10 to 25 | |
| 5.1 to 33 |