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Duratron® T PAI PolyAmide-Imide
Electrical Grade Specifications

904 West 6th Street, Shiner, Texas 77984 USA
Phone: 1-361-594-2941 Fax: 1-361-594-2349 E-Mail:


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click to resize photo Duratron ® T PAI is the highest performing melt processable plastic. It has superior resistance to elevated temperatures. It is capable of performing under severe stress conditions at continuous temperatures to 500°F (260°C). Parts machined from Duratron ® T PAI stock shapes provide greater compressive strength and higher impact resistance than most advanced engineering plastics. Its extremely low coefficient of linear thermal expansion and high creep resistance deliver excellent dimensional stability over its entire use range. PAI is an amorphous material with a Tg (glass transition temperature) of 537°F (280°C).

Depending upon the method used to produce a stock shape (sheet, rod, or tube), the properties of the resulting material can vary. Generally speaking, the best mechanical properties are exhibited by injection molded material. However, the process used is generally defined by the size and shape of the desired material. For example, small diameter rod and thin sheets are extruded -- larger shapes are compression molded. See the following descriptions and properties table for details.


Duratron T4203 PAI (Extruded)

Duratron ® T4203 extruded PAI offers excellent compressive strength and the highest elongation of the Duratron ® T grades. It also provides electrical insulation and exceptional impact strength. This grade is commonly used for electrical connectors and insulators due to its high dielectric strength.

Extruded Duratron ® T4203 PAI is typically only available in thin sheets and small diameter rods. Check with us for availability of Duratron T4203 PAI in the size you need.

Duratron T4503 PAI (Compression Molded)

Duratron ® T4503 compression molded PAI is the same formulation as Duratron T4203 PAI, but has been made into stock shapes using a different manufacturing process. The resulting material is similar to Duratron T4203 PAI, but has slightly different mechanical properties (see datasheet below).

Compression-molded Duratron ® T4503 PAI is typically available only in larger diameter rods (in short lengths), thicker sheets, and large (but short length) tubes. Check with us for availability of Duratron T4503 PAI in the size you need.

For a complete overview of Quadrant's Duratron product family, including other high-performance engineering plastics, see this page.
see also datasheets for:
Torlon | Electrical Grade Torlon | Bearing Grade Torlon | Glass-Filled Torlon | Carbon-Filled Torlon

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ASTM or UL test Property Duratron T4203 PAI
Duratron T4503 PAI
Compression Molded
D792 Density (lb/in³)
D570 Water Absorption, 24 hrs (%) 0.4 0.35
D570 Water Absorption, Saturation (%) 1.7 1.7
D638 Tensile Strength (psi) 20,000 18,000
D638 Tensile Modulus (psi) 600,000 500,000
D638 Tensile Elongation at Break (%) 10 5
D790 Flexural Strength (psi) 24,000 24,000
D790 Flexural Modulus (psi) 600,000 600,000
D732 Shear Strength (psi) 24,000 -
D695 Compressive Strength (psi) 24,000 18,000
D695 Compressive Modulus (psi) 478,000 350,000
D785 Hardness, Rockwell E80(M120) E80(M119)
D256 IZOD Notched Impact (ft-lb/in) 2.0 1.5
PTM 55007 Coefficient of Friction (Dry vs. Steel) Dynamic 0.35 0.3
PTM 55007 Limiting PV (4:1 Safety Factor) (ft-lb-in2-min 12,500 7,500
PTM 55010 Wear Factor "k" x 10-10(in3-min/ft-lb-hr 50 > 1,000
D696 Coefficient of Linear Thermal Expansion
(x 10-5 in./in./°F)
1.7 1.5
D648 Heat Deflection Temp (°F / °C)
at 264 psi

532 / 278

532 / 278
D3418 Glass Transition Temp (°F / °C) 527 / 275 527 / 275
- Max Operating Temp (°F / °C) 500 / 260 500 / 260
C177 Thermal Conductivity
(x 10-4 cal/cm-sec-°C)


UL94 Flammability Rating V-0 V-0
D149 Dielectric Strength (V/mil) short time, 1/8" thick 580 600
D150 Dielectric Constant at 1 MHz 4.2 4.2
D150 Dissipation Factor at 1 MHz 0.026 0.031
EOS/ESD S11.11 Surface Resistivity (ohms/square) > 1016 > 1013

NOTE: 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.
DURATRON is a registered trademark of Quadrant Engineering Plastic Products.
TORLON is a registered trademark of Solvay Advanced Polymers.

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Boedeker Plastics, Inc.
904 West 6th Street, Shiner, Texas 77984 USA
USA TOLLFREE : 1-800-444-3485
Phone: 1-361-594-2941     Fax: 1-361-594-2349     E-Mail:

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