PEEK vs. Limestone
PEEK and limestone belong to fundamentally different material chemistries. PEEK is a polymeric material, while limestone is ceramic. 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 (18, in this case) are not shown.
For each property being compared, the top bar is PEEK and the bottom bar is limestone.
Metric UnitsUS Customary Units
Mechanical Properties
| Compressive (Crushing) Strength, MPa | 120 to 300 | |
| 700 |
| Elastic (Young's, Tensile) Modulus, GPa | 4.0 to 24 | |
| 77 |
| Tensile Strength: Ultimate (UTS), MPa | 97 to 200 | |
| 100 |
Thermal Properties
| Maximum Temperature: Mechanical, °C | 330 | |
| 360 |
| Specific Heat Capacity, J/kg-K | 1390 to 1700 | |
| 920 |
| Thermal Conductivity, W/m-K | 0.25 to 0.93 | |
| 2.1 |
| Thermal Expansion, µm/m-K | 15 to 52 | |
| 8.0 |
Otherwise Unclassified Properties
| Density, g/cm3 | 1.3 to 1.5 | |
| 2.6 |
Common Calculations
| Stiffness to Weight: Axial, points | 1.5 to 10 | |
| 16 |
| Stiffness to Weight: Bending, points | 36 to 73 | |
| 55 |
| Strength to Weight: Axial, points | 20 to 41 | |
| 11 |
| Strength to Weight: Bending, points | 36 to 55 | |
| 18 |
| Thermal Diffusivity, mm2/s | 0.1 to 0.51 | |
| 0.88 |
| Thermal Shock Resistance, points | 34 to 57 | |
| 12 |