PEEK vs. Grade 300 Maraging Steel
PEEK and grade 300 maraging steel belong to fundamentally different material chemistries. PEEK is a polymeric material, while grade 300 maraging steel 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 (27, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.
For each property being compared, the top bar is PEEK and the bottom bar is grade 300 maraging steel.
Mechanical Properties
| Compressive (Crushing) Strength, MPa | 120 to 300 | |
| 730 to 1880 |
| Elastic (Young's, Tensile) Modulus, GPa | 4.0 to 24 | |
| 190 |
| Elongation at Break, % | 1.6 to 43 | |
| 6.5 to 18 |
| Shear Strength, MPa | 50 to 100 | |
| 640 to 1190 |
| Tensile Strength: Ultimate (UTS), MPa | 97 to 200 | |
| 1030 to 2030 |
Thermal Properties
| Melting Onset (Solidus), °C | 340 | |
| 1430 |
| Specific Heat Capacity, J/kg-K | 1390 to 1700 | |
| 450 |
| Thermal Expansion, µm/m-K | 15 to 52 | |
| 12 |
Otherwise Unclassified Properties
| Density, g/cm3 | 1.3 to 1.5 | |
| 8.2 |
Common Calculations
| Stiffness to Weight: Axial, points | 1.5 to 10 | |
| 13 |
| Stiffness to Weight: Bending, points | 36 to 73 | |
| 23 |
| Strength to Weight: Axial, points | 20 to 41 | |
| 35 to 68 |
| Strength to Weight: Bending, points | 36 to 55 | |
| 28 to 43 |
| Thermal Shock Resistance, points | 34 to 57 | |
| 31 to 62 |