FFKM vs. PEI
FFKM belongs to the thermoset elastomers (rubber) classification, while PEI belongs to the thermoplastics. There are 6 material properties with values for both materials. Properties with values for just one material (23, in this case) are not shown.
For each property being compared, the top bar is FFKM and the bottom bar is PEI.
Metric UnitsUS Customary Units
Material Properties
| Density, g/cm3 | 2.0 | |
| 1.3 to 1.5 |
| Elongation at Break, % | 170 | |
| 3.0 to 34 |
| Maximum Temperature: Mechanical, °C | 280 | |
| 170 |
| Strength to Weight: Axial, points | 2.3 | |
| 24 to 30 |
| Strength to Weight: Bending, points | 7.2 | |
| 40 to 44 |
| Tensile Strength: Ultimate (UTS), MPa | 16 | |
| 110 to 160 |