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MATERIAL FAMILY
PEEK
PEEK (polyether ether ketone) is a high-performance engineering thermoplastic known for excellent chemical resistance, high thermal resistance, dimensional stability, strength, wear performance, and machinability. Modern Plastics supplies PEEK stock shapes and specialty grades for demanding medical, semiconductor, aerospace, chemical-processing, and precision-machining applications.
GRADES IN THIS FAMILY
Which PEEK
PEEK is available in multiple formulations and branded grades for different performance requirements. Modern Plastics supplies general-purpose, filled, bearing, static-dissipative, food-processing, and medical PEEK options for applications that require heat resistance, chemical resistance, dimensional stability, wear performance, or documented material traceability.
| Grade / Type | Best Suited For | Common Forms |
|---|---|---|
| VESTAKEEP® Medical PEEK | Implantable, surgical-instrument, and medical-device applications requiring documented medical-grade material and traceability | Rod, sheet, plate, resin, powder, filament |
| Unfilled PEEK | General high-performance machining, chemical service, electrical insulation, and precision components | Rod, sheet, plate, tube |
| 30% Glass-Filled PEEK | Applications requiring greater stiffness and improved dimensional stability under load | Rod, sheet |
| 30% Carbon-Filled PEEK | Wear, bearing, and structural applications requiring increased stiffness and improved thermal conductivity | Rod, sheet |
| Bearing / Wear Grades | Bushings, bearings, sliding surfaces, and friction-sensitive components | Rod, sheet |
| ESD / Static-Dissipative PEEK | Semiconductor handling, fixtures, test hardware, and electronics applications requiring static control | Rod, sheet |
| Detectable / Food-Processing PEEK | Food-processing and packaging applications where metal or X-ray detection may be required | Grade dependent |
STOCK SHAPES & SIZES
PEEK stock shapes for machining and fabrication
Modern Plastics supplies PEEK stock shapes for precision machining, fabrication, prototyping, and production applications. Available forms vary by grade and manufacturer, with common options including sheet, plate, rod, and tube. Specialty medical and implantable PEEK grades are also available in additional forms.
PEEK Sheet & Plate
For machined components, fixtures, structural parts, wear components, and high-performance fabricated parts.
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PEEK Rod
For bushings, bearings, spacers, seals, rollers, fasteners, and precision turned components.
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PEEK Tube
For sleeves, insulators, cylindrical components, fluid-handling parts, and machined assemblies.
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Stock availability, dimensions, and grade options vary. Contact Modern Plastics for current inventory, cut-to-size availability, and material certification requirements.
PROPERTIES
Typical PEEK properties
The values below are typical for unfilled PEEK and are provided as general engineering guidance. Actual performance varies by manufacturer, grade, filler content, processing history, and test method.
| Property | Typical Value | Test Method |
|---|---|---|
| Tensile strength | ~14,500 psi (100 MPa) | ASTM D638 |
| Flexural modulus | ~590,000 psi | ASTM D790 |
| Continuous service temperature | 480°F (250°C) | — |
| Water absorption, 24 hr | ~0.14% | ASTM D570 |
| Hardness | Rockwell M99 | ASTM D785 |
| Biocompatibility | Grade dependent | ISO 10993 |
Typical values for unfilled PEEK. Filled, bearing, medical, and implant grades can differ significantly. Confirm final design values against the applicable supplier data sheet before specifying or quoting.
TYPICAL APPLICATIONS
Where it gets specified
PEEK is specified across medical, semiconductor, fluid-handling, aerospace, and industrial applications where standard plastics may not provide enough heat resistance, chemical resistance, dimensional stability, or long-term performance.
Spinal & Orthopaedic Implants
Implant-grade PEEK is used for long-term implantable components where biocompatibility, strength, radiolucency, and documented material traceability are critical.
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Surgical Instruments
Medical-grade PEEK is used for autoclavable handles, guides, instrument bodies, and reusable components that must withstand repeated sterilization cycles.
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Fluid Handling
PEEK is used for valve seats, seals, manifolds, fittings, and other components exposed to aggressive chemicals, elevated temperatures, and demanding process conditions.
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Semiconductor Tooling
PEEK is used for wet-process fixtures, wafer-handling components, test hardware, and precision tooling where chemical resistance and dimensional stability are important.
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INDUSTRIES USING THIS MATERIAL
Who buys PEEK from us
PEEK is specified across demanding industries where heat resistance, chemical resistance, dimensional stability, wear performance, and documented material traceability are important. Grade selection depends on the application, operating environment, regulatory requirements, and required documentation.
Medical Devices
PEEK is used in implantable components, surgical instruments, orthopedic applications, and medical-device programs that require documented material performance and traceability.
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Semiconductor
PEEK is used for wet-process fixtures, wafer handling, test hardware, and precision components that require chemical resistance, dimensional stability, and clean performance.
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Pharmaceutical
PEEK is used in process equipment, fluid-handling components, seals, guides, and precision parts exposed to aggressive media, heat, and repeated cleaning.
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Nuclear Fusion/Energy
PEEK can support high-performance insulating, structural, and vacuum-compatible components used in demanding energy and advanced-technology environments.
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IF PEEK IS NOT THE ANSWER
Compare PEEK with other high-performance plastics
PEEK is a strong choice for demanding applications, but another high-performance plastic may be a better fit depending on temperature, chemical exposure, wear, electrical requirements, dimensional stability, and budget.
ULTEM™ / PEI
A lower-cost high-performance thermoplastic with excellent dielectric strength, dimensional stability, and heat resistance, but generally less chemical resistance than PEEK.
Explore ULTEM™ / PEI →
PTFE
Offers exceptional chemical resistance and very low friction, but significantly lower mechanical strength and stiffness than PEEK.
Explore PTFE →
Vespel®
A premium polyimide option for extreme temperature, wear, and demanding aerospace or industrial applications where higher material cost may be justified.
Explore Vespel® →
Torlon® PAI
Offers very high strength, stiffness, wear resistance, and thermal performance for demanding mechanical and high-temperature applications.