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Ensinger PEI

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Polikim EFALON® K-35 PTFE, 35% Carbon Filled
Categories: Polymer; Thermoplastic; Fluoropolymer; Polytetrafluoroethylene (PTFE); Polytetrafluoroethylene (PTFE), Carbon Fiber Filled
Material Notes: K25 and K35 have less thermal expansion, higher wear resistance, less deformation under load properties compared to virgin Efalon® (PTFE). Applications: Bearings, piston rings, gaskets, seal rings.

Information provided by Polikim Polimer.
Vendors: No vendors are listed for this material. Please click here if you are a supplier and would like information on how to add your listing to this material.
 
Physical PropertiesOriginal ValueComments
Density 2.00 - 2.10 g/ccASTM D792
Deformation 0.30 - 1.8 %
@Temperature 23.0 °C,
Time 86400 sec,
Pressure 13.7 MPa		permanent; ASTM D621
 1.3 - 1.5 %
@Temperature 150 °C,
Time 86400 sec,
Pressure 0.981 MPa		total
 2.3 - 4.3 %
@Temperature 23.0 °C,
Time 86400 sec,
Pressure 13.7 MPa		total; ASTM D621
 5.0 - 6.0 %
@Temperature 150 °C,
Time 86400 sec,
Pressure 4.90 MPa		total
 
Mechanical PropertiesOriginal ValueComments
Hardness, Shore D 66 - 70ASTM D2240
Tensile Strength, Ultimate 110 - 160 kg(f)/cm²ASTM D638
Elongation at Break 55 - 90 %ASTM D638
Compressive Strength 95.0 - 120 kg(f)/cm²1% Deformation; ASTM D695
Coefficient of Friction 0.16
Coefficient of Friction, Static 0.13
Limiting Pressure Velocity 0.00360 - 0.00376 MPa-m/sec3 m/min
 0.00409 - 0.00654 MPa-m/sec30 m/min
 0.004905 - 0.008175 MPa-m/sec300 m/min
 
Electrical PropertiesOriginal ValueComments
Volume Resistivity >= 100 ohm-cmASTM D257
Surface Resistance >= 10000 ohm50% rel. humidity; ASTM D257
 
Thermal PropertiesOriginal ValueComments
CTE, linear 75.0 - 80.0 µm/m-°C
@Temperature 25.0 - 100 °C		ASTM D696
 90.0 - 110 µm/m-°C
@Temperature 25.0 - 200 °C		ASTM D696
 120 - 140 µm/m-°C
@Temperature 25.0 - 300 °C		ASTM D696
Thermal Conductivity 0.00190 - 0.00210 cal cm/sec-cm²-°C
Maximum Service Temperature, Air 270 °Ccontinuous
Minimum Service Temperature, Air -260 °C

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to go back to viewing the property data in MatWeb's normal format.

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