KEL-F® is a product name for polychlorotrifluoroethene (PCTFE or PTFCE), a thermoplastic chlorofluoropolymer.  Other trade names for this product are Aclon® and Neoflon®.

MechanicalASTM Test MethodValueUnits
Strength to Weight Ratio--ksi
Specific Gravity @73 FD7922.08 - 2.19-
Tensile Strength @73 F, (ult)/(yld)D6385,700 (ult)psi
Tensile Modulus of Elasticity @73 FD638220,000psi
Tensile Elongation at Break @73 FD638140%
Flexural Strength @73 FD7908,500psi
Flexural Modulus of Elasticity @73 FD790190,000psi
Shear Strength @73 FD732-psi
Comprehensive Strength, (% Deformation) @73 FD6955,500 (10)psi
Comprehensive Modulus of Elasticity @73 FD695170,000psi
Hardness, Rockwell, Scale as noted @73 FD785(S80)-
Hardness, Durometer, Shore D @73 FD2240D75-
Izod Impact, (Notched) @73 FD256 Type A1.5ft-lb/in of notch
Coefficient of Friction, (Dry vs Steel) Dynamic-0.18-
Limiting PV, (with 4 to 1 factor of safety applied)--psi-ft/min
ThermalASTM Test MethodValueUnits
Coefficient of Linear Thermal Expansion @73 FE-831 (TMA)3.5 E-05in/in/F
Heat Deflection Temperature @264 psiD648167F
Tg-Glass transition termperature, (Amorphous)D3418-F
Melting Point, (VS=Vicat Softening Temp.)D3418410 - 420F
Continuous Service Temperature in Air, (Max.)-392F
Thermal Conductivity-1.80BTU-in/hr-ft2-F
ElectricASTM Test MethodValueUnits
Dielectric Strength, Short TermD149500Volts/mil
Volume ResistivityD2571.0 E+19ohm-cm
Dielectric Constant @10E6 HzD1502.4-
Dissipation Factor @10E6 HzD1500.014-
Flammability @3.1 mm unless notedUL94V-0-
H2OASTM Test MethodValueUnits
Water Absorption, Immersion, 24 hoursD570(7)0.00% by weight
Water Absorption, SaturationD570(7)0.00% by weight