Torlon 4503 is compression molded polyamide-imide offers exceptional properties for insulating components. It is similar in composition to Torlon 4203 which is the extruded grade of unfilled Torlon. When a component requires larger stock and cannot be extruded, 4503 is utilized. Torlon is known for its high temperature resistance, dimensional stability and machinability.

Machined with standard machining techniques, special care must be taken however to achieve close tolerances.

Annealing Torlon can be critical to the final properties of a component. Post-curing torlon removes all moisture in the part and must be done with care to reduce bubbling or warping the final components. Once post-cured, PAI components will have superior mechanical properties to uncured parts.

Specification Test Value Units
Specific Gravity, 73°F D792 1.4
Tensile Strength @ Yield, 73°F D638 18000 psi
Tensile Modulus of Elasticity, 73°F D638 500000 psi
Tensile Elongation (at break), 73°F D638 3 %
Flexural Strength, 73°F D790 18000 psi
Flexural Modulus of Elasticity D790 560000 psi
Shear Strength, 73°F D732 16400 psi
Compressive Strength - Ultimate psi
Compressive Strength at 2% Deformation D695 10000 psi
Compressive Strength at 10% Deformation D695 22000 psi
Deformation Under Load %
Compressive Modulus of Elasticity, 73°F D695 950000
Compressive Strength ⊥ to Laminate (Modulus) psi
Compressive Strength ⊥ to Laminate (Yield) psi
Compressive Strength ⊥ to Laminate (Ultimate) 10000 psi
Hardness, Durometer (Shore "D" scale) D2240
Hardness, Rockwell (Scale as noted) D785 M106 Rockwell M
Izod Impact, Notched @ 73°F D256 Type A 0.8 ft.lbs/in. of notch
Coefficient of Friction (Dry vs Steel) Static PTM55007 0.25
Coefficient of Friction (Dry vs Steel) Dynamic PTM55007 0.2
Maximum Static Bearing Load (P) PTM55007 1000 psi
Maximum Unlubricated No Load Bearing Velocity (V) PTM55007 900 ft/minute
Maximum Limiting PV (Unlubricated) PTM55007 50000 psi x ft/min.
Wear Factor "K" x 10-10 PTM55010 300 Cubic in.-min/
Sand Wheel Wear/Abrasion Test UHMW=100
Minimum Mating Surface Hardness Rockwell (Brinnell)
Coefficient of Linear Thermal Expansion E-831(TMA) 1.4 in/in/°F x 10-5
Coefficient of Thermal Expansion // to Laminates E-831(TMA) 1.4 in/in/°F x 10-5
Coefficient of Thermal Expansion I to Laminates E-831(TMA) 1.4 in/in/°F x 10-5
Softening Point °F
Heat Deflection Temperature 264 psi D648 534 °F
Embrittlement Temperature °F Min.
Continuous Service Temperature in Air 500 °F Max.
Short Term Service Temperature 500 °F Max.
Tg-Glass Transition (Amorphous) D3418 527 °F
Melting Point (Crystalline Peak) D3418 N/A °F
Thermal Conductivity F433 3.7 BTU-in/(hr/ft2°F)
Dielectric Strength Short Term D149 Volts/mil
Volume Resistivity D257 ohm/cm
Surface Resistivity D257 >1013 ohm/cm
Dielectric Constant, 106 Hz D150 5.4
Dissipation Factor, 106 Hz D150 0.037
Flammability @ 3.1mm(1/8 in.) UL94 UL94 V-O
Arc Resistance seconds
Water Absorption, Immersion 24 Hours D570 (2) 0.4 %
Water Absorption, Immersion Saturation D570 (2) 1.5 %
Machinability Rating 3 1=easy, 10=difficult
Rod Diameter Availability (Off the Shelf) 1 3 inches
Sheet Thickness Availability (Off the Shelf) 0.25 1 inches