PEI vs. PC
Both PEI and PC are thermoplastics. There are 14 material properties with values for both materials. Properties with values for just one material (15, in this case) are not shown.
For each property being compared, the top bar is PEI and the bottom bar is PC.
Metric UnitsUS Customary Units
Mechanical Properties
| Elongation at Break, % | 3.0 to 34 | |
| 3.5 to 110 |
| Flexural Modulus, GPa | 3.4 to 5.9 | |
| 2.3 to 10 |
| Flexural Strength, MPa | 140 to 210 | |
| 92 to 160 |
| Impact Strength: Notched Izod, J/m | 55 to 110 | |
| 140 to 440 |
| Rockwell M Hardness | 110 to 130 | |
| 68 to 120 |
| Tensile Strength: Ultimate (UTS), MPa | 110 to 160 | |
| 66 to 160 |
Thermal Properties
| Glass Transition Temperature, °C | 210 | |
| 150 |
| Heat Deflection Temperature At 1.82 MPa (264 psi), °C | 200 to 210 | |
| 130 to 150 |
| Specific Heat Capacity, J/kg-K | 1050 to 1220 | |
| 1000 to 1200 |
| Thermal Expansion, µm/m-K | 20 to 53 | |
| 10 to 69 |
Otherwise Unclassified Properties
| Density, g/cm3 | 1.3 to 1.5 | |
| 1.2 to 1.4 |
| Water Absorption At Saturation, % | 0.9 to 1.3 | |
| 0.16 to 0.19 |
Common Calculations
| Strength to Weight: Axial, points | 24 to 30 | |
| 15 to 30 |
| Strength to Weight: Bending, points | 40 to 44 | |
| 30 to 45 |