FEP Properties

Teflon Properties from Tef Cap

Fluorinated Ethylene Propylene

PropertiesUnits / ASTMFEP
MECHANICAL PROPERTIES
Specific GravityD7922.15
Elongation %D638250 - 330
Tensile Strength (psi)D6382,800 - 5,000
Flexural Strength (psi)D790No Break
Compressive StrengthD6952,200
Tensile Elastic Modulus (Young's Modulus) (psi)D63850,000
Flexural Modulus 103MPa (103kgf/cm2)D79078,000 - 92,000
Flex Life (MIT cycles)D21765,000 - 80,000
Hardness Durometer Shore DD636D55
Coefficient of Friction on steel.05
Abrasion Resistance 1000 revs.Taber14 - 20
Impact Strength IZOD 73°F/23°C, notched ft/lbs/inD256No Break
THERMAL PROPERTIES
Melting Point°F500
Upper Service Temperature (20,000h)°F400
Flame RatingUL 94V-O
Thermal ConductivityBTU/hr/ft2/deg °F in1.4
Linear Coefficient of Thermal ExpansionD6968.3 - 10.5
Heat of FusionBTU/LB11
Heat of CombustionBTU/LB2,200
Low Temperature Embrittlement°F-450
ELECTRICAL PROPERTIES
Dielectric ConstantD150/103Hz ( 106Hz )2.1
Dielectric Strength 10 mil filmD149>2,000
Volume Resistivity ohm-cmD257>10^18
Surface Resistivity ohm/sq.D257>10^17
GENERAL PROPERTIES
Chemical/Solvent ResistanceD543Excellent
Water Absorption, 24hr / %<0.01
Deformation Under LoadD621/110°C5.0
Refractive Index1.338
Limiting Oxygen Index %>95