PBT (polybutylene terephthalate) [Hydex® 4101, Valox®]
Properties
Common uses
Material Specifications
ASTM or UL test | Property | Value |
Physical |
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D792 | Density (lb/in3)/(g/cm3) | 0.047 (1.31) |
D570 | Water absorption, 24 hrs (%) | 0.07 |
Mechanical |
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D638 | Tensile strength (psi) | 9,400 |
D638 | Tensile elongation at break (%) | 50 |
D638 | Tensile modulus (psi) | 425,000 |
D790 | Flexural strength (psi) | 11,600 |
D790 | Flexural modulus (psi) | 420,000 |
D695 | Compressive strength (psi) | 11,000 |
D695 | Compressive modulus (psi) | - |
D785 | Hardness, Rockwell | 120 |
D256 | Izod notched impact (ft-lb/in) | 0.7 |
Thermal |
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D3418 | Melting temp (F°/C°) | 420/215 |
D696 | Coefficient of linear thermal expansion (x 10–5 in./in./°F) |
4.5 |
D648 | Heat deflection temp (F°/C°) at 264 psi | 200/93 |
- | Max operating temp (F°/C°) | 221/105 |
C177 | Thermal conductivity (BTU-in/ft²-hr-°F) |
- – |
UL94 | Flammability rating | H-B |
Electrical |
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D150 | Dielectric constant at 60 Hz | 3.3 |
D150 | Dissipation factor at 60 Hz | 0.002 |
D149 | Dielectric strength (V/mil) short time, ⅛” thick |
410 |
D257 | Volume resistivity (ohm/cm) at 50% RH | 4.5 x 1016 |
These are typical values for reference and comparison only. They should not be used as a basis for design specifications or quality control. Contact us for the manufacturers’ complete material property datasheets. All values were taken at 73°F (23°C) unless otherwise noted.
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*Hydex® is registered trademark of Ensinger.