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Certifications ISO 13485:2016 | AS9100D | ITAR | FDA Registered | CAGE Code 5TTR7 

PET

PET for CNC Machining

PET is a durable, rigid engineering plastic known for its superior machining qualities, chemical resistance, and excellent bearing and wear characteristics.

Updated: 8/20/26

A low friction, stiff, high strength plastic with good wear properties

PET

Polyethylene terephthalate, semicrystalline, widely recognized as PET, is a durable, rigid engineering plastic known for its superior machining qualities, chemical resistance, and excellent bearing and wear characteristics.

PET is frequently utilized in applications demanding low moisture absorption, minimal thermal expansion, and resistance to staining or cleaning chemicals.

Performance Characteristics

  • Excellent chemical resistance
  • Low moisture absorption
  • Low thermal expansion
  • Good wear and stain resistance

Common Brands

  • Sustadur PET
  • TECAPET PET
  • Ertalyte

PET Properties

  • Mechanical Properties
  • Thermal Properties
  • Electrical Properties
  • Optical Properties
  • Mechanical Properties

    Tensile Strength 11,500 psi
    Tensile Modulus of Elasticity 400,000 psi
    Tensile Elongation 70%
    Flexural Strength 15,000 psi
    Flexural Modulus of Elasticity 400,000 psi
    Compressive Strength -- psi
    Hardness (Rockwell) R125
    Izod Impact 0.7 ft-lbs/in

  • Thermal Properties

    Coefficient of Linear Thermal Expansion 3.9 in/in/°F x 10-5
    Heat Deflection Temperature (66 psi/264 psi) 240 / 175 °F
    Max Continuous Service Temperature in Air 230 °F

  • Electrical Properties

    Dielectric Strength 400 V/mil

  • Optical Properties

    Light Transmittance -- %
    Haze -- %