PEEK vs. Soda-lime Glass
PEEK and soda-lime glass belong to fundamentally different material chemistries. PEEK is a polymeric material, while soda-lime glass is ceramic. Therefore, their performance will be even more dissimilar than would be suggested by the difference in properties. There are 13 material properties with values for both materials. Properties with values for just one material (23, in this case) are not shown.
For each property being compared, the top bar is PEEK and the bottom bar is soda-lime glass.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 4.0 to 24 | |
| 70 to 71 |
| Tensile Strength: Ultimate (UTS), MPa | 97 to 200 | |
| 41 to 180 |
Thermal Properties
| Maximum Temperature: Mechanical, °C | 330 | |
| 300 |
| Specific Heat Capacity, J/kg-K | 1390 to 1700 | |
| 720 to 800 |
| Thermal Conductivity, W/m-K | 0.25 to 0.93 | |
| 1.0 to 1.1 |
| Thermal Expansion, µm/m-K | 15 to 52 | |
| 8.8 to 9.0 |
Otherwise Unclassified Properties
| Density, g/cm3 | 1.3 to 1.5 | |
| 2.4 |
Common Calculations
| Stiffness to Weight: Axial, points | 1.5 to 10 | |
| 16 |
| Stiffness to Weight: Bending, points | 36 to 73 | |
| 56 |
| Strength to Weight: Axial, points | 20 to 41 | |
| 4.6 to 20 |
| Strength to Weight: Bending, points | 36 to 55 | |
| 11 to 28 |
| Thermal Diffusivity, mm2/s | 0.1 to 0.51 | |
| 0.51 to 0.6 |
| Thermal Shock Resistance, points | 34 to 57 | |
| 4.7 to 20 |