PEI Unfilled

PEI Unfilled


What is the Material: PEI Unfilled is an amorphous material.

Key Material Features: This material is beneficial in applications requiring mechanical strength, rigidity, hydrolysis/steam resistance, temperature resistance, and dimensional stability.

Other Considerations: This material is typically not recommended in bearing and wear applications.



Property Value Typical ASTM Test
Chemical Designation (PEI) Polyetherimide
Trade Names (®, ™) Tecapei, Ultem 1000
Color Amber Transparent
Density (g/cm^3) 1.27 D 792


Property Value Typical ASTM Test
Modulus of Elasticity (Tensile Test) (psi) 430000 D 638
Tensile Strength at Break (psi) 17500 D 638
Elongation at Yield (%) 7 D 638
Elongation at Break (%) 40 D 638
Flexural Strength (psi) 23000 D 790
Modulus of Elasticity (Flexural Test) (psi) 480000 D 790
Compression Strength: 10% Strain (psi) 21000 D 695
Compression Strength: 1% Strain (psi) 3500 D 695
Compression Modulus (psi) 480000 D 695
Impact Strength (Izod) (ft-lbs/in) 0.60 D 256
Hardness (R) 126 D 785
Hardness (M) 110 D 785


Property Value Typical ASTM Test
Vicat Softening Point (°F) 426
Deflection Temperature (°F) (66 psi) 410 D 648
Deflection Temperature (°F) (264 psi) 394 D 648
Service Temperature Continuous (°F) 338
Service Temperature Intermittent (°F) 392
Thermal Expansion (CLTE) (in/in/°F) 3.10E-5 D 696
Thermal Conductivity (BTU-in/hr-ft^2-°F) 1.50


Property Value Typical ASTM Test
Volume Resistivity (Ω*cm) 1.00E17 D 257
Dielectric Strength (V/mil) 830 D 149


Property Value Typical ASTM Test
Moisture Absorption (%) (24 Hours) 0.25 D 570
Moisture Absorption (%) (Saturated) 1.25 D 570
Flammability V-0
The data stated are typical values intended for reference and comparison purposes only. The data should not be used as a basis for design specifications or quality control. The information is provided as a guide to the best of our knowledge and given without obligation or liability. Testing under individual application circumstances is recommended.