PEEK vs. 515.0 Aluminum
PEEK and 515.0 aluminum belong to fundamentally different material chemistries. PEEK is a polymeric material, while 515.0 aluminum is a metal. 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 (24, in this case) are not shown.
For each property being compared, the top bar is PEEK and the bottom bar is 515.0 aluminum.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 4.0 to 24 | |
| 70 |
| Elongation at Break, % | 1.6 to 43 | |
| 10 |
| Shear Strength, MPa | 50 to 100 | |
| 190 |
| Tensile Strength: Ultimate (UTS), MPa | 97 to 200 | |
| 280 |
Thermal Properties
| Maximum Temperature: Mechanical, °C | 330 | |
| 170 |
| Melting Onset (Solidus), °C | 340 | |
| 620 |
| Specific Heat Capacity, J/kg-K | 1390 to 1700 | |
| 900 |
| Thermal Expansion, µm/m-K | 15 to 52 | |
| 23 |
Otherwise Unclassified Properties
| Density, g/cm3 | 1.3 to 1.5 | |
| 2.6 |
Common Calculations
| Stiffness to Weight: Axial, points | 1.5 to 10 | |
| 15 |
| Stiffness to Weight: Bending, points | 36 to 73 | |
| 52 |
| Strength to Weight: Axial, points | 20 to 41 | |
| 30 |
| Strength to Weight: Bending, points | 36 to 55 | |
| 36 |
| Thermal Shock Resistance, points | 34 to 57 | |
| 13 |