PLA vs. PEEK
Both PLA and PEEK are thermoplastics. There are 16 material properties with values for both materials. Properties with values for just one material (15, in this case) are not shown.
For each property being compared, the top bar is PLA and the bottom bar is PEEK.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 3.5 | |
| 4.0 to 24 |
| Elongation at Break, % | 6.0 | |
| 1.6 to 43 |
| Flexural Modulus, GPa | 4.0 | |
| 3.8 to 19 |
| Flexural Strength, MPa | 80 | |
| 150 to 330 |
| Tensile Strength: Ultimate (UTS), MPa | 50 | |
| 97 to 200 |
Thermal Properties
| Glass Transition Temperature, °C | 60 | |
| 240 |
| Maximum Temperature: Mechanical, °C | 50 | |
| 330 |
| Melting Onset (Solidus), °C | 160 | |
| 340 |
| Specific Heat Capacity, J/kg-K | 1800 | |
| 1390 to 1700 |
| Thermal Conductivity, W/m-K | 0.13 | |
| 0.25 to 0.93 |
Otherwise Unclassified Properties
| Density, g/cm3 | 1.3 | |
| 1.3 to 1.5 |
Common Calculations
| Stiffness to Weight: Axial, points | 1.6 | |
| 1.5 to 10 |
| Stiffness to Weight: Bending, points | 40 | |
| 36 to 73 |
| Strength to Weight: Axial, points | 11 | |
| 20 to 41 |
| Strength to Weight: Bending, points | 24 | |
| 36 to 55 |
| Thermal Diffusivity, mm2/s | 0.058 | |
| 0.1 to 0.51 |