PEEK vs. Grade 350 Maraging Steel
PEEK and grade 350 maraging steel belong to fundamentally different material chemistries. PEEK is a polymeric material, while grade 350 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 350 maraging steel.
Mechanical Properties
Compressive (Crushing) Strength, MPa | 120 to 300 | |
750 to 2400 |
Elastic (Young's, Tensile) Modulus, GPa | 4.0 to 24 | |
190 |
Elongation at Break, % | 1.6 to 43 | |
4.1 to 18 |
Shear Strength, MPa | 50 to 100 | |
710 to 1400 |
Tensile Strength: Ultimate (UTS), MPa | 97 to 200 | |
1140 to 2420 |
Thermal Properties
Melting Onset (Solidus), °C | 340 | |
1420 |
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 | |
38 to 82 |
Strength to Weight: Bending, points | 36 to 55 | |
29 to 49 |
Thermal Shock Resistance, points | 34 to 57 | |
35 to 74 |