Grade A Lava vs. PEEK
Grade A lava and PEEK belong to fundamentally different material chemistries. Grade A lava is a ceramic material, while PEEK is polymeric. Therefore, their performance will be even more dissimilar than would be suggested by the difference in properties. There are 12 material properties with values for both materials. Properties with values for just one material (20, in this case) are not shown.
For each property being compared, the top bar is grade A lava and the bottom bar is PEEK.
Metric UnitsUS Customary Units
Mechanical Properties
| Compressive (Crushing) Strength, MPa | 76 to 170 | |
| 120 to 300 |
| Flexural Strength, MPa | 28 to 69 | |
| 150 to 330 |
| Tensile Strength: Ultimate (UTS), MPa | 6.9 to 21 | |
| 97 to 200 |
Thermal Properties
| Maximum Temperature: Mechanical, °C | 650 to 1130 | |
| 330 |
| Specific Heat Capacity, J/kg-K | 840 | |
| 1390 to 1700 |
| Thermal Conductivity, W/m-K | 2.0 | |
| 0.25 to 0.93 |
| Thermal Expansion, µm/m-K | 2.5 to 3.3 | |
| 15 to 52 |
Otherwise Unclassified Properties
| Density, g/cm3 | 2.3 to 2.5 | |
| 1.3 to 1.5 |
| Water Absorption At Saturation, % | 2.5 | |
| 0.22 to 0.5 |
Common Calculations
| Strength to Weight: Axial, points | 0.77 to 2.5 | |
| 20 to 41 |
| Strength to Weight: Bending, points | 3.2 to 7.3 | |
| 36 to 55 |
| Thermal Diffusivity, mm2/s | 1.0 | |
| 0.1 to 0.51 |