PEEK sheets, rods & bushes

Overview

PEEK keeps its strength, stiffness and shape at temperatures that soften most plastics. Where PTFE would creep under high load and pressure, PEEK holds its dimensions, which is why it is used for compressor valve plates, high-pressure rings and precision parts.

Properties

Density

1.30 – 1.32 g/cm³

Tensile strength

95 – 110 N/mm²

Elongation at break

20 – 45 %

Flexural modulus

≈ 4,000 N/mm²

Hardness

Shore D 85 – 88

Melting point

343 °C

Continuous service temperature

up to 250 °C

Heat deflection, 1.8 N/mm²

≈ 152 °C (filled: ≈ 315 °C)

Dielectric strength

≈ 20 kV/mm

Materials

• Virgin PEEK
• Carbon-filled PEEK
• Glass-filled PEEK
• Bearing-grade PEEK

Not sure which grade? Compare PTFE grades or ask an engineer.

Applications

• Compressor valve plates
• Poppets & seats
• Piston & rider rings
• Back-up rings
• Bushes & bearings
• Gears
• Insulators
• Pump wear rings