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Material Information

Ultem® PEI is a high performance polymer that is transparent amber in color. Ultem® PEI in general is high in strength and rigidity at elevated temperatures with long-term heat resistance. It is inherently flame resistant and low in smoke production. It also offers excellent dimensional stability, excellent electrical insulating properties, and a broad chemical resistance. It is easily machined and finished. This makes it ideal for use in medical reusable application where repeated sterilization is required. The unfilled grade of Ultem® PEI is called Ultem® 1000. Ultem® 1000 excels in hot air and water environments because it is very hydrolytically stable. It is also UV and gamma radiation resistant. Ultem® 1000 is available in the form of film, sheet, and rod.


  • Reusable medical equipment
  • Electrical/electronic applications
  • Semiconductor burn in sockets
  • Aircraft/aerospace interiors
  • Food service
  • High temperature lighting bezels
  • Under-hood automotive applications
  • Medical instrument trays
  • Institutional kitchenware


  • Hydrolytically stable
  • UV and gamma radiation resistant
  • Excellent mechanical strength
  • Easily machined and finished
  • Outstanding heat resistance
  • Exceptional resistance to environmental forces
  • Inherent flame resistance with low smoke
  • High dielectric strength
  • Low dissipation factor over wide range of frequencies


PhysicalAstm Test MethodDuratron® U1000 PEI (Ultem® 1000)
Density (lb/in^3)D7920.046
Specific GravityD7921.28
Water Absorption @ 24 hours (%)D5700.25
Water Saturation (%)D5701.25
Tensile Strength (PSI)D63816,500
Tensile Modulus (PSI)D638500,000
Tensile Elongation at Break (%)D63880
Flexural Strength (PSI)D79020,000
Flexural Modulus (PSI)D790500,000
Compressive Strength (PSI)D69522,000
Compressive Modulus (PSI)D695480,000
Izod Impact (Notched), ft-lb/inD2560.5
Rockwell HardnessD785M112, R125
Coefficient of Thermal Expansion,
Heat Deflection Temperature 264 psi, ºFD648400
Glass Transition Temp, ºFD3418410
Continous Service Temp (Operating), °F340
Thermal Conductivity, BTU-in/hr-ft² °FC1770.85
Flammability RatingUL94VO
Dielectric Strength, Short Term,
(Volts/Mil) @ .125″ Thick
Surface Resistivity (ohms/square)EOS/ESD S11.11> 10^13
Dielectric Constant at 1 KHzD1503.15
Dissipation Factor at 1 KHzD1500.0013

Disclosure: The information contained herein are typical values intended for reference and comparison purposes only. They should NOT be used as a basis for design specifications or quality control. Contact us for manufacturers’ complete material property datasheets. All values at 73°F (23°C) unless otherwise noted.


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