Grade 350 Maraging Steel vs. PEEK
Grade 350 maraging steel and PEEK belong to fundamentally different material chemistries. Grade 350 maraging steel is a metal, while PEEK is a polymeric material. 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 grade 350 maraging steel and the bottom bar is PEEK.
Mechanical Properties
| Compressive (Crushing) Strength, MPa | 750 to 2400 | |
| 120 to 300 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 4.0 to 24 |
| Elongation at Break, % | 4.1 to 18 | |
| 1.6 to 43 |
| Shear Strength, MPa | 710 to 1400 | |
| 50 to 100 |
| Tensile Strength: Ultimate (UTS), MPa | 1140 to 2420 | |
| 97 to 200 |
Thermal Properties
| Melting Onset (Solidus), °C | 1420 | |
| 340 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 1390 to 1700 |
| Thermal Expansion, µm/m-K | 12 | |
| 15 to 52 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.2 | |
| 1.3 to 1.5 |
Common Calculations
| Stiffness to Weight: Axial, points | 13 | |
| 1.5 to 10 |
| Stiffness to Weight: Bending, points | 23 | |
| 36 to 73 |
| Strength to Weight: Axial, points | 38 to 82 | |
| 20 to 41 |
| Strength to Weight: Bending, points | 29 to 49 | |
| 36 to 55 |
| Thermal Shock Resistance, points | 35 to 74 | |
| 34 to 57 |