Materials and Tools
PEEK™ (Polyetheretherketone)
Chemicals which interact with PEEK polymer are not pH dependent; rather, interaction is more determined by other physical properties of the chemical(s) in question. Not recommended for use with nitric acid; sulfuric acid; halogenated acids, such as hydrofluoric, hydrobromic, and hydroiodic acids (hydrochloric acid is approved for most applications); and pure halogenated gases. Additionally, due to a swelling effect, be cautious in using the following solvents with PEEK tubing: methylene chloride, THF, and DMSO.
| Temperature Range | up to 100 °C (tubing); up to 125 °C (fittings) |
|---|---|
| Thread Strength | Excellent |
| Oxygen Permeability | 14cc / 100in2 * 24h * atm / mil @ 25 °C |
| pH Range | 0 - 14 |
| Sterilization Techniques | gamma irradiation; ethylene oxide; thermal |
| Autoclavable? | Y |
PEEK™ Extended Properties
| General | Methods | Units | ||
|---|---|---|---|---|
| Relative Density | (Crystalline) (Amorphous) |
ASTM D792 ASTM D792 |
- - |
1.30 1.26 |
| Typical Level of Crystallinity | - | % | 30-35 | |
| Mold Shrinkage | - | % | 1.0-1.8 | |
| Water Absorption | 24 hr. @ 73 °F Equilibrium @ 73 °F |
ASTM D570 ISO R62A |
% % |
0.50 0.50 |
| Mechanical | Methods | Units | ||
| Tensile Strength | @ 73 °F (yield) @ 482 °F (yield) |
ASTM D638 (5mm/min) ASTM D638 (5mm/min) |
psi psi |
14,000 1,750 |
| Elongation at Break | @ 73 °F | ASTM D638 (5mm/min) | % | >50 |
| Elongation at Yield | @ 73 °F | ASTM D638 (5mm/min) | % | 4.9 |
| Flexural Modulus: | @ 73 °F @ 248 °F @ 482 °F |
ASTM D790 ASTM D790 ASTM D790 |
psi psi psi |
594,000 580,100 43,500 |
| Flexural Strength | @ 73 °F @ 248 °F @ 482 °F |
ASTM D790 ASTM D790 ASTM D790 |
psi psi psi |
24,650 14,500 1,800 |
| IZOD Impact Strength | @ 73 °F Notched Unnotched |
ASTM D256 | ft.-lb./in. | 1.57 No Break |
| Thermal | Methods | Units | ||
| Melting Point | DSC | °F (°C) | 644(340) | |
| Glass Transition Temperature, Tg (onset value) | DSC | °F (°C) | 289(143) | |
| Melt Flow Index | 400 °C/2.16 kg | ASTM D1238 | g/10 min. | 4 |
| Coefficient of Thermal Expansion: | <Tg >Tg |
ASTM D696 ASTM D696 |
10-5 °F-1 | 2.6 6 |
| Heat Deflection Temperature, 264 psi | ASTM D648 | °F (°C) | 320(160) | |
| UL Continuous Use Temperature | Mechanical Electrical |
464(240) 500(260) |
||
| Sterilization | Methods | Units | ||
| 200 steam cycles at 280 °F | short time, 1/8" thick | - | - | No Effect |
| 1000 Mrads gamma radiation | - | - | No Effect | |
| Chemicals (ethylene oxide, etc.) | - | - | No Effect | |
| Heat up to 500 °F | - | - | No Effect | |
| Electrical | Methods | Units | ||
| Dielectric Strength (50µ film) | ASTM D149 | KV/cm | 190 | |
| Dielectric Constant | 50Hz-10kHz, 0-300 °F 50Hz, 392 °F |
- | 3.20-3.30 4.50 |
Special Notes
Chemicals which interact with PEEK polymer are not pH dependent; rather, interaction is more determined by other physical properties of the chemical(s) in question. Not recommended for use with nitric acid; sulfuric acid; halogenated acids, such as hydrofluoric, hydrobromic, and hydroiodic acids (hydrochloric acid is approved for most applications); and pure halogenated gases. Additionally, due to a swelling effect, be cautious in using the following solvents with PEEK tubing: methylene chloride, THF, and DMSO.