PEEK is Widely Used For:

  • Semiconductor machinery components
  • Aerospace parts
  • Bushings, bearings, seals, and
    back-up rings
  • Pump and valve components
  • Vacuum wand handles
  • Down hole electrical connectors
  • Medical instrument parts
  • Food processing machinery components

Performance Characteristics:

  • Strong and stiff
  • Chemical resistant, hydrolysis resistant, autoclavable
  • Easy to machine and fabricate
  • Good mechanical properties at elevated temperatures
  • UL 94 V-0 flammability rating
    (0.059" thickness)
  • Very low smoke and toxic gas
    emissions when exposed to flame

Common Brands:

  • SustaPEEK
  • Ketron®

Performance Advantages of VICTREX® PEEK™ White Paper


Strong, stiff plastic with outstanding chemical resistance; performs over a wide range of temps

PEEK (polyetheretherketone) is a high-performance engineering plastic with outstanding resistance to harsh chemicals, and excellent mechanical strength and dimensional stability. It offers hydrolysis resistance to steam, water, and sea water. PEEK has the ability to maintain stiffness at high temperatures and is suitable for continuous use at temperatures up to 338oF (170oC). This engineering plastic has a proven track record in challenging environments such as aerospace, oil and gas, and semiconductor.

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SHEET Dimensions:
12 in x 12 in – 1,000 mm x 2,000 mm
0.250 in – 4 in
ROD Outside Diameter:
0.187 in – 6 in
TUBE Outside Diameter:
30 mm – 210 mm
COLOR Natural, Black
GRADES Glass-Filled, Bearing Grades

Length, width, thickness, and diameter tolerances vary by size, by manufacturer, brand, and grade. Custom sizes and colors available upon request.

PEEK Properties and Material Options

Virgin PEEK (unfilled)– is naturally abrasion resistant.

Glass-Filled PEEK– offers enhanced mechanical and thermal properties over those of basic PEEK, plus excellent resistance in harsh chemical environments and is electrically insulative.

Bearing Grade PEEK– has enhanced bearing and wear properties. TECAPEEK® PVX is an ultra high performance bearing material with wear enhancing additives.

FDA Compliant PEEK– grades available that meet FDA requirements.

Tech Tip– When polymers are required for applications that involve large changes in temperature, best practices involve selecting a filled grade of a stable (low CTE) base polymer. When fillers are added to highly stable base polymers such as VICTREX® PEEK, the resulting composites exhibit extremely low CTE values, which makes PEEK a good candidate for applications requiring plastics with CTEs as close as possible to those of metals.

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Typical properties OF PEEK
Tensile strength psi D638 14,000 24,620
Flexural modulus psi D790 590,000 1,450,000
Izod impact (notched) ft-lbs/in of notch D256 1.6 1.84
Heat deflection temperature
@ 264 psi
°F D648 306 599
Maximum continuous service
temperature in air
°F   480 482
Water absorption
(immersion 24 hours)
% D570 0.50 0.11
Coefficient of linear thermal expansion in/in/°Fx10-5 D696 2.6 1.2
Coefficient of friction (dynamic)     0.25 0.30

Values may vary according to brand name. Please ask your Curbell Plastics representative for more specific information about an individual brand.

Need more information about this material? Use our interactive plastic properties table


PEEK Material Properties Comparison Graphs: Tensile Strength and Heat Deflection Temperature of PEEK vs PPS and PEEK GF30