Vespel®


This high performance polyimide material has consistently exhibit superior performance in a variety of applications requiring low wear and long life in severe environments.

Material Specifications
Physical Properties Units Test Vespel SP-1
Density lb/in.3
g/cm3		 D792 0.051
.43
Water Absorption % D570 at 73°F 0.24 48hrs
at 122°F 0.72
Mechanical Properties Units Test Vespel SP-1
Tensile Strength psi D638 at 73°F 12,500
at 500°F 6,000
Tensile Modulespsi
 D638 -
Tensile Elongation at Break Tensile % D638 at 73°F 7.5
at 500°F 6.0
Flexural Strength psi
 D790 at 73°F 16,000
at 500°F 9,000
Flexural Modulus psi (Kpsi) D790 at 73°F 450,000
at 500°F 250,000
Compressive Strength psi D695 10% strain at 73°F
19,300
Compressive Modulus psi D695 350,000
Hardness Rockwell (Shore D) - D785 E45- 60
Izod Impact Notched ft. - lb./in. D256 0.8
Thermal Properties Units Test Vespel SP-1
Coefficient of Linear
Thermal Expansion 		10-5 in./in./°F D696 3.0
Heat Deflection Temperature at 264 psi °F/°C D648 680 / 360
Melting Temperature°F/°C D3418 -
Max. Use Temperature°F/°C - 500 / 260
Thermal Conductivity BTU- in./ft.2-hr.- °F
x10 - 4 cal/cm - sec. - °C		 C177 2.0
6.9
Flammability Rating - UL94 V-0
Electrical Properties

Units

Test

Vespel SP-1
Dielectric Strength (V-mil) D149 560
Dielectric Constant at 1 MHz (60Hz) D150 3.55
Dissipation Factor at 1 MHz (60Hz) D150 0.0034
Volume Resistivity (ohm - cm) at 50% RH D257 1014 - 1015

The information supplied is not to be taken as a warranty or representation for which Technical Products, Inc. assumes legal responsibility, is offered solely for your consideration, investigation and verification. All risk of use, singly or in combination with other products, whether or not in accordance with the instructions, directions or suggestions is borne by the user.