PI Graphite 15%


What is the Material: PI 15% Graphite is an amorphous imidized material filled with 15% graphite.

Key Material Features: This material is beneficial in applications requiring improved friction and wear , while maintaining the properties of other PI materials including extreme temperature resistance, diverse chemical resistance, strength, and dimensional stability.

Other Considerations: This material is attacked by hot water/steam.


Property Value Typical ASTM Test
Chemical Designation (PI) Polyimide
Trade Names (®, ™) Tecasint 2021, Vespel SP-21, Duratron PI D7015G
Filler 15% Graphite
Color Black
Density (g/cm^3) 1.46 D 792


Property Value Typical ASTM Test
Modulus of Elasticity (Tensile Test) (psi) 638000 D 638
Tensile Strength at Yield (psi) 14645 D 638
Elongation at Break (%) 3.0 D 638
Flexural Strength (psi) 20700 D 790
Modulus of Elasticity (Flexural Test) (psi) 587000 D 790
Compression Strength: 10% Strain (psi) 19300 D 695
Compression Strength: 1% Strain (psi) 4200 D 695
Compression Modulus (psi) 420000 D 695
Impact Strength (Izod) (ft-lbs/in) 0.80 D 256
Hardness (R) 126 D 785
Hardness (D) 87 D 785
Hardness (M) 73 D 785
Coefficient of Friction (Kinetic, 40 psi, 50 fpm) 0.25 D 3702
Coefficient of Friction (Static) 0.23 D 3702
Wear (K) Factor (in^3-min/ft-lbs-hr) (Against Steel, 40 psi, 50 fpm) 1.00E-9 D 3702


Property Value Typical ASTM Test
Glass Transistion Temperature (°F) 660 D 3418
Deflection Temperature (°F) (264 psi) 600 D 648
Service Temperature Continuous (°F) 536
Service Temperature Intermittent (°F) 626
Thermal Expansion (CLTE) (in/in/°F) 2.30E-5 D 696
Thermal Conductivity (BTU-in/hr-ft^2-°F) 2.7


Property Value Typical ASTM Test
Dielectric Strength (V/mil) 186 D 149
Dissipation Factor (1MHz) 0.007 D 150
Dielectric Constant (1MHz) 5.42 D 150


Property Value Typical ASTM Test
Moisture Absorption (%) (24 Hours) 0.44 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.