Polyetheretherketone (PEEK)/Properties

A Matrix of Properties

From pure unfilled PEEK for medical devices to graphite filled PEEK for high friction environments, with glass and carbon fills options for enhanced strength and wear resistance, PEEK offers a matrix of diverse properties to go with its baseline properties of purity, high strength at high temperatures, chemical and fatigue resistance, thermal and hydrolysis stability, and inherent fire retardant.

Resistance to:
  • Chemicals
  • Corrosion
  • Creep
  • Fatigue
High Temperature
  • Transition 289ºF - 324ºF
  • Melt 649ºF - 729ºF
  • Continuous use 572ºF
Light Weight
High Strength
  • Compressive
  • Modulus
  • Rigidity
  • Tensile
Super Stability
  • Thermal to 300°C
  • Dimensional
  • Machines like steel
  • Moldable Complex Geometries
Low coefficient of friction
  • Lubricated or Non-lubricated
  • Conformability (non-leaking)
  • Noise reduction



PEEK's power lies in its combination of exceptional properties for high end niche applications in diverse industries. In its pure (unfilled) state, PEEK has an exceptionally high degree of purity, near perfect dimensional integrity, and can be repeatedly sterilized by all standard methods for medical applications.

Semi-crystalline polymers retain a high degree of mechanical properties close to their melting temperatures.

Glass Filled

Strong at High Temperatures

Glass fiber increases strength, stiffness and heat capacity (300°C/572°F) for rigorous structural and mechanical applications.

Glass fiber reinforcement enhances modulus and impact resistance while retaining chemical and fatigue resistance.

Properties Guide

Data Sheets

PEEK Machining to Tolerances
Tight Machining Tolerances

PEEK Geometry
Complex Geometries

Carbon Filled

High Wear Applications

Carbon fiber for the highest strength and wear resistance of any of the PEEK grades and the linear thermal expansion (CLTE) maintaining mechanical properties at temperatures similar to glass filled PEEK (300°C/572°F) for wear applications such as under-the-hood automotive.

Carbon/Graphite Filled

Exceptional Friction Resistance

Carbon/graphite (PTFE) blend for exceptional performance in high friction, high heat environments: lubricated and non-lubricated.

Combine low coefficients of friction with high tensile strength and modulus to produce superior wear resistance, while maintaining mechanical properties, in high velocity and pressure conditions.: ideal for thrust washers, spline liners, valve seats, bushings, bearings, wear rings, cams, etc.

Non-conductive Grades
Semi-conductive Grades

Explore PEEK Applications

Grades referenced on this page are injection moldable. For extrusion grades go to: Resin Companies

Most Grades of PEEK are RoHS Compliant: check data sheets.