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TYPICAL PROPERTIES OF PTFE

Property Units ASTM Method TFE Granular Resin FEP 25% Glass Fiber 15% Graphite 60% Bronze Tensile strength, 73°F. lb./sq. in. D638-61T 1,000-4,000 3,000 2,800-3,600 1,300-2,700 1,800-2,000 Elongation, 73°F. % D638-61T 100-200 300 325 185 85 Hardenss Durometer   D1706-59T D50-65 D55 54 55 65 Compressive Stress at 1% Deformation 73°F, at 1% offset, 73°F. psi D695-52T 600 - 1000 1080 1120 psi D695-52T 1000 - - - - Coefficient of linear thermal expansion per °F., 73°F. -140°F. - D696-44 5.5 x 10-5 4.6-5.8 x 10-5 3-8 x 10-5 4-7 x 10-5 4-5 x 10-5 Thermal Conductivity 0.18 in. BTU/hr./sq. ft./(°F./in.) Cenco Finch 1.7 - 2.6 3.1 3.3 Specific Heat BTU/lb./°F - 0.25 0.28 - - - Deformation under load, 78°F., 1000psi., 24 hr. 78°F., 2000 psi., 24 hr. % D621-59 - 1.8 - - - D621-59 15 - 11 9 5 Heat-distortion temperature 66 lb./sq. in. °F. D648-56 250 - - - - Dielectirc strength, short time, 0.080 in. v./mil D149-55T 600 600 - - - Dielectric constant, 60 to 2 x 109 cps. - D150-59T 2.1 2.1 2.4-2.5 Too conductive to be measured Dissipation factor, 60 to 2 x 109 cps. - D150-59T 0.0003 0.0002-0.00012 0.0753-0.00029 Too conductive to be measured Water Absorption % D570-54T < 0.01 < 0.01 0.015 - 0.019 Flammability - D635-56T Nonflammable - - - - Resistance to weathering - - Excellent - - - - Static coefficient of friction against polished steel - - 0.05-0.08 - 0.10-0.13 0.08-0.10 0.08-0.10 Specific gravity - D792-60T 2.1-2.3 2.12-2.17 2.22 2.19 3.97 Property Units ASTM Method TFE Granular Resin FEP 25% Glass Fiber 15% Graphite 60% Bronze

• Data shown are average values and should not be used for specification. • Actual properties depend to some extent on method of fabrication. • This material was adapted from Dupont Publication PTFE Fluorocarbon Resins.