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PTFE Properties

Polytetrafluoroethylene

PropertiesUnits / ASTMPTFE
MECHANICAL PROPERTIES
Specific GravityD7922.18
Elongation %D638200 - 450
Tensile Strength (psi)D6382000 - 4500
Flexural Strength (psi)D790No Break
Compressive StrengthD6953500
Tensile Elastic Modulus (Young's Modulus) (psi)D63857,000
Flexural Modulus 103MPa (103kgf/cm2)D79071,000 - 85,000
Flex Life (MIT cycles)D2176>1,000,000
Hardness Durometer Shore DD636D50 -65
Coefficient of Friction on steel.02
Abrasion Resistance 1000 revs.Taber12
Impact Strength IZOD 73°F/23°C, notched ft/lbs/inD2563
THERMAL PROPERTIES
Melting Point°F621
Upper Service Temperature (20,000h)°F500
Flame RatingUL 94V-O
Thermal ConductivityBTU/hr/ft2/deg °F in1.7
Linear Coefficient of Thermal ExpansionD696>11.6
Heat of FusionBTU/LB29 - 37
Heat of CombustionBTU/LB2,200
Low Temperature Embrittlement°F-450
ELECTRICAL PROPERTIES
Dielectric ConstantD150/103Hz ( 106Hz )2.1
Dielectric Strength 10 mil filmD149>1,400
Volume Resistivity ohm-cmD25710^18
Surface Resistivity ohm/sq.D25710^17
GENERAL PROPERTIES
Chemical/Solvent ResistanceD543Excellent
Water Absorption, 24h,%%
Deformation Under LoadD621/110°C5.0
Refractive Index1.35
Limiting Oxygen Index %>95

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