PEEK Plastic Materials

PEEK Sheet, Rod, Tube, Filament & Custom CNC Parts

High-performance PEEK plastic for demanding industrial applications requiring high-temperature performance, chemical resistance, mechanical strength, dimensional stability, and wear resistance. Available as sheet, rod, tube, and precision CNC-machined components.

Material Specifications

Full Name Polyether Ether Ketone
Material Family PAEK / Semi-crystalline
Glass Transition (Tg) 143°C
Melting Point (Tm) 343°C
Flame Rating UL94 V-0
Density 1.30 g/cm³
±0.01mm

machining tolerance

24h

RFQ response after drawings and application conditions are received

5-7 days

fast dispatch capability for suitable stock-form orders

1 piece

MOQ (Min. Order)

Material Science

PEEK Material Selection for Engineering Applications

PEEK (Polyether Ether Ketone) is a semi-crystalline high-performance engineering thermoplastic designed for applications where conventional plastics cannot provide the required combination of temperature resistance, chemical resistance, mechanical strength, wear resistance, and dimensional stability.

Selecting PEEK is not only about its high temperature capability. The right material choice depends on the actual operating conditions and potential failure modes of the component, including continuous heat exposure, chemical contact, mechanical loading, creep resistance, sliding wear, electrical insulation requirements, dimensional control, cleaning, and sterilization environments.

A reliable PEEK component requires the right combination of material grade, reinforcement formulation, machining process, and manufacturing capability to match the final application requirements.

Stock Shapes & Custom Parts

PEEK Stock Shapes & Custom Components

Great Plastics supplies PEEK stock shapes and custom-machined components for industrial applications. Standard sheet, rod, and tube sizes are available, with custom machining offered according to your drawings and specifications.

PEEK-sheet

PEEK Sheets

PEEK sheets provide flat stock material for machined plates, fixtures, insulation components, and other precision parts.

peek-tube

PEEK Rods

PEEK rods are round stock materials commonly machined into bushings, spacers, shafts, pins, and other cylindrical components.

peek-rod

PEEK Tubes

PEEK tubes are used for sleeves, insulating components, bushings, and other cylindrical parts requiring precise dimensions.

PEEK Filaments

1.75 mm PEEK filament for high-temperature FDM/FFF 3D printing, suitable for selected industrial and engineering applications requiring high-performance thermoplastic materials.

PEEK-machined(Polyetheretherketone)

Custom Machined Parts

Custom PEEK parts are CNC machined according to customer drawings, CAD files, or samples. Great Plastics supports prototype, low-volume, and production machining using different PEEK grades.

Material Selection

PEEK Plastic Material Grades

Great Plastics supplies and machines PEEK grades formulated for different mechanical, thermal, electrical, and wear requirements.

grade-virgin-peek.jpg

Virgin PEEK

Unfilled

Start here for balanced heat, chemical, mechanical, and electrical insulation performance when fillers are not required.

grade-peek-cf30

CF30

Carbon-Fiber PEEK

Use carbon-fiber reinforced PEEK when load, stiffness, wear, and movement control become the main design concerns.

grade-peek-gf30

GF30

Glass Fiber Reinforced PEEK

Consider glass-filled PEEK when stiffness, creep resistance, and dimensional stability are more important than unfilled material balance.

grade-PTFE filled PEEK

PTFE-Filled

PTFE-Filled PEEK

Consider PTFE-filled PEEK for sliding and low-friction applications such as guides, wear pads, seals, and moving contact parts.

grade-bearing

Bearing Grade

Bearing Grade PEEK

Use bearing and wear-modified grades for bushings, rollers, thrust washers, guides, and parts running under load.

If the grade is uncertain, send the operating conditions first: temperature, load, speed, mating material, chemicals, electrical requirement, tolerance, and documentation need.

Performance Data

Key Properties of PEEK Plastic

PEEK combines mechanical strength, thermal stability, chemical resistance, wear resistance, and electrical insulation properties. Grade selection should be based on the temperature, load, chemical environment, and performance requirements of the application.

Mechanical Properties

  • Tensile strength: 90–100 MPa (unreinforced);

  • Tensile modulus: approximately 3.5–4.0 GPa for unfilled PEEK;

  • Fatigue resistance: Good fatigue resistance for components subjected to repeated mechanical loading.

  • Creep resistance: Good creep resistance under sustained mechanical loads, including at elevated temperatures.

  • Impact strength: Good impact resistance, with performance depending on grade and temperature.

Thermal Properties

  • Glass transition temperature (Tg): ~143°C

  • Melting temperature (Tm): ~343°C

  • Continuous service temp: Up to 250°C (482°F)depending on grade, load, and operating conditions.

  • Flammability: UL 94 V-0 for applicable grades and thicknesses.

  • Low smoke emission:suitable for selected vacuum, semiconductor, and other controlled-environment applications

Chemical Properties

  • Chemical resistance: Good resistance to many organic solvents, fuels, oils, water, steam, and selected acids and alkalis.

  • Hydrolysis resistance: excellent resistance to hot water, steam, and repeated exposure to moisture.

  • Solvent resistance:Resistant to many common organic solvents

  • Attacked by: Strong acids, certain halogenated solvents, and concentrated bases at elevated temperatures may affect PEEK performance.

  • Low moisture absorption: Helps maintain dimensional stability in humid and moisture-exposed environments.

Electrical Properties

  • Electrical insulation: Maintains good insulating performance across a broad range of temperatures and frequencies.

  • Dielectric constant: Relatively stable dielectric behavior with limited change across frequency ranges, depending on grade and test conditions.

  • Volume resistivity: High electrical resistivity with good resistance to moisture-related performance changes.

  • Dielectric strength: Suitable for electrical insulation applications requiring high dielectric strength.

  • ESD-control grades: Carbon-filled and other modified grades are available for applications requiring controlled electrical conductivity.

Manufacturing Capability

PEEK Machining and Custom Components

Over a decade of experience machining PEEK and high-performance polymers to the tightest tolerances.

PEEK can be CNC machined using standard precision machining equipment, but achieving tight tolerances requires careful control of heat generation, internal stress, workholding, and dimensional stability.

We manage PEEK-specific machining challenges—heat generation during cutting, stress relief, and surface finish requirements—through tooling selection, fixturing, and process control. Our machinists work from your CAD files (STEP, IGES, or DWG) to produce first-article parts for approval before production runs.

CNC Milling & Turning
Precision Machining
Tight Tolerance Parts
Prototype Production
OEM Volume Manufacturing
Multi-Process Machining
1–10,000+
Parts per Run
CMM
Inspection
24h
Quote Turnaround

custom Selection

Custom Machined PEEK Components

Great Plastics develops suitable processing solutions based on critical dimensions, tolerance requirements, operating environment, and inspection standards, helping customers achieve a balance between performance requirements and manufacturing costs during the project evaluation process.

PEEK-machined(Polyetheretherketone)

Grade

Confirm virgin PEEK, GF30, CF30, PTFE-filled, bearing grade, antistatic, conductive, or customer-specified material.

Component geometry

Evaluate thin-walled structures, deep slots, small holes, internal bores, threads, sharp corners, and complex unsupported structures to determine suitable machining strategies.

Tolerance

Identify critical dimensions, datum structure, GD&T, hole tolerance, flatness, concentricity, runout, and inspection requirements.

Surface finish

Define general machined finish, sealing surface, bearing surface, visible surface, deburring, or special finishing.

Production quantity

Production volume influences the most suitable manufacturing method, including CNC machining, compression molding, extrusion, or a combination of production methods.

Industry Use Cases

Applications of PEEK Plastic Materials

PEEK applications span industries where reliability under extreme conditions is non-negotiable. Below are the most common use cases and why PEEK is specified.

Semiconductor Lithography Equipment

Semiconductor Equipment

Wafer-handling components, test sockets, CMP-related parts, fixtures, and vacuum components where dimensional stability, chemical resistance, and controlled contamination are important.

Engineering Plastics as Space Shuttle Parts

Aerospace Components

Lightweight mechanical, electrical, and structural components requiring high strength-to-weight performance, temperature resistance, and dimensional stability.

Medical equipment engineering plastic parts

Medical Devices

Precision components for selected medical and laboratory applications requiring chemical resistance, sterilization compatibility, and dimensional stability.

Engineering plastics are used in new energy vehicles

Automotive Systems

Bushings, thrust washers, seals, bearings, and electrical components exposed to heat, fluids, friction, and mechanical loads.

Petrochemicals_files

Chemical Processing

Pump components, valve seats, seals, gaskets, and process components exposed to chemicals, steam, hot water, and elevated temperatures.

Renewable Energy

Electrical & Electronic

High-temperature connectors, insulators, sensor housings, and precision electrical components requiring stable insulation and dimensional performance.

Material Comparison

PEEK vs. Other Engineering Plastics

Property PEEK PTFE PPS PEI (Ultem)
Max Continuous Temp 250°C 260°C (low load) 200–220°C ~170°C
Tensile Strength 90–100 MPa 20–30 MPa 65–80 MPa 90–105 MPa
Wear Resistance Excellent Good (low friction) Good Moderate
Chemical Resistance Excellent Superior Very Good Moderate
Creep Resistance Excellent Poor Good Good
Machinability Excellent Poor (deforms) Good Good
Relative Cost High Medium Low–Medium Medium–High

Not sure which engineering plastic fits your application? Use the Material Selection Tool or send the operating conditions and drawing for material review through Material Properties.

Your Partner

Why Choose Great Plastics

Efficient PEEK procurement requires effective matching between material selection, inventory form, manufacturing process, application requirements, and documentation requirements.Great Plastics supports PEEK production routes, stock-shape sourcing, precision CNC machining, and engineering-oriented RFQ review.

01

Multiple PEEK Solutions

Depending on component geometry, production volume, tolerance requirements, and material grade, suitable manufacturing methods may include CNC machining, extrusion processing, compression molding, or other application-specific solutions.

02

Stock Shapes

PEEK sheets, bars, tubes, plates, and custom-made parts can all be evaluated in the same procurement process.

03

Precision Machining

Machining tolerance down to +/-0.01 mm can be supported for suitable part geometries, dimensions, material grade, and drawing requirements.

04

Documentation Support

Project requirements may include technical data sheets, certificates of conformity, inspection reports, material certificates, batch traceability records, and customer-specific documents.

Request a Quote for Custom PEEK Plastic Components

Send us your drawings, specifications, or part samples for engineering review.

We’ll respond with material recommendations, pricing, and lead times within one business day.

Common Questions

Frequently Asked Questions

Quick answers to the questions engineers and procurement teams ask most about PEEK materials.

PEEK and PTFE serve different engineering requirements. PEEK generally provides higher strength, stiffness, and dimensional stability, while PTFE offers very low friction and broad chemical resistance. Material selection depends on temperature, load, friction, wear, and chemical conditions.

Suitable PEEK grades can provide continuous service at approximately 250–260°C, depending on grade, mechanical load, environment, and exposure duration. PEEK has a melting temperature of approximately 343°C, but the melting point should not be interpreted as a service temperature.

PEEK typically offers higher mechanical strength, abrasion resistance, and creep resistance; PPS offers excellent chemical resistance, dimensional stability, and lower cost, making it suitable for applications requiring high cost-effectiveness.

PEEK is used in semiconductor equipment, aerospace, medical devices, automotive, oil and gas, chemical processing, and electrical/electronics manufacturing. Any application requiring high temperature, chemical resistance, or mechanical reliability in a lightweight polymer is a candidate for PEEK.

Yes. PEEK machines well on standard CNC milling and turning equipment. However, tight-tolerance PEEK machining requires proper tooling, fixturing, and heat management to avoid dimensional drift from stress relief. Great Plastics specializes in precision PEEK machining with tolerances down to ±0.01 mm.