Plastic PTFE

Plastic PTFE (Teflon) strength, stiffness, density and thermal properties, with their source.

A bracket in Plastic PTFE, smooth finish.

Mechanical
Yield strength	9MPa1
Ultimate tensile strength	39.3MPa2
Elongation at break	350%2
Young's modulus (stiffness)	not sourced
Density	2,160kg/m³2
Strength to weight	4.17kN·m/kg
Stiffness to weight	not sourced
Poisson's ratio	0.461
Shear modulus	not sourced
Bulk modulus	not sourced
Speed of sound	not sourced

Stiffness against densityHigher and further left: stiffer for its weight

Strength against densityHigher and further left: stronger for its weight

Thermal
Thermal conductivity	0.25W/m·K1
Thermal expansion	100µm/m·K1
100 mm part over a 50 °C swing	500µm growth
Specific heat	1,400J/kg·K1
Heats up and cools (diffusivity)	0.0827mm²/s
Thermal shock resistance	not sourced
Melting point	second melting peak327°C2
Max service temperature	service temperature260°C3

Thermal conductivity against densityHigher and further left: spreads more heat for its weight

Thermal expansion against thermal conductivityLower and further right: warps less when heated

Sources3 documents: Chemours

Values for: Bulk polymer (molded or machined). Chemours Teflon PTFE 7C X granular molding resin, typical values (tensile/elongation measured on 0.13 mm skived tape)

1
Teflon PTFE Fluoropolymer Resin Properties HandbookChemoursarchived copyYield strength: typical yield strength at 23 °C (Teflon PTFE, Table 8)Poisson's ratio: typical, 23 °C (Teflon PTFE resins, Chemours handbook)Thermal conductivity: typical, granular resin, 4.6 mm specimenThermal expansion: typical, granular resin, 23-60 °C (ASTM E228)Specific heat: typical, granular resin, 20 °C (ASTM D4591)
2
Teflon PTFE 7C X Product InformationChemoursarchived copyUltimate tensile strength: typical, skived tape 0.13 mmElongation at break: typical, skived tape 0.13 mmDensity: typical (standard specific gravity, ASTM D4894)Melting point: second melting peak (sintered polymer), +/-10
3
Teflon PTFE 6C X Product InformationChemoursarchived copyMax service temperature: service temperature (Chemours general Teflon PTFE statement)

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Thermal properties of Plastic PTFE

Thermal conductivity of Plastic PTFE

Plastic PTFE has a thermal conductivity of 0.25 W/m·K (0.144 BTU/hr·ft·°F). Basis: typical, granular resin, 4.6 mm specimen. Source: Chemours, Teflon PTFE Fluoropolymer Resin Properties Handbookarchived copy.

Specific heat of Plastic PTFE

The specific heat capacity of Plastic PTFE is 1,400 J/kg·K (0.334 BTU/lb·°F). Basis: typical, granular resin, 20 °C (ASTM D4591). Source: Chemours, Teflon PTFE Fluoropolymer Resin Properties Handbookarchived copy.

Coefficient of thermal expansion of Plastic PTFE

Plastic PTFE expands 100 µm/m·K (55.6 µin/in·°F): a 100 mm part grows 500 µm over a 50 °C rise. Basis: typical, granular resin, 23-60 °C (ASTM E228). Source: Chemours, Teflon PTFE Fluoropolymer Resin Properties Handbookarchived copy.

Thermal diffusivity of Plastic PTFE

Computed from the conductivity, density and specific heat (k / ρc): 0.0827 mm²/s, how fast a temperature change spreads through it.

Melting point of Plastic PTFE

Plastic PTFE melts at 327 °C (621 °F). Basis: second melting peak (sintered polymer), +/-10. Source: Chemours, Teflon PTFE 7C X Product Informationarchived copy.

Maximum service temperature of Plastic PTFE

The maximum service temperature of Plastic PTFE is 260 °C (500 °F). Basis: service temperature (Chemours general Teflon PTFE statement). Source: Chemours, Teflon PTFE 6C X Product Informationarchived copy.