Material Data Sheet
Material: Torlon 4540
Polyamide-ImideThis seal and bearing grade offers a very low coefficient of friction and good wear properties. It was developed specifically for use in rotating equipment. Its composition is the same as the former Torlon 4340 and used when larger shapes are required. Typical application for Torlon 4540 PAI include labyrinth seals, wear rings, bushings and bearings of all types.
| Mechanical Properties | Value | Units |
| Specific Gravity, 73°F | 1.46 | |
| Tensile Strength, 73°F | 13,000 | psi |
| Tensile Modulus of Elasticity, °F | 575,000 | psi |
| Tensile Elongation ( at break), 73°F | 5 | % |
| Flexural Strength, 73°F | 24,000 | psi |
| Flexural Modulus of Elasticity, 73°F | 680,000 | psi |
| Shear Strength, 73°F | - | psi |
| Compressive Strength, 10% Deformation, 73°F | 17,000 | psi |
| Compressive Modulus of Elasticity, 73°F | 350,000 | psi |
| Hardness, Rockwell, Scale as noted, 73°F | E66(M107) | |
| Hardness, Durometer, Shore "D" Scale, 73°F | D90 | |
| Izod Impact (notched), 73°F | 1 | ft-lb/in of notch |
| Coefficient of Friction (Dry vs. Steel) Dynamic | 0.2 | |
| Limiting PV (with 4:1 safety factor applied) | 7,500 | ft.lbs./in.2 min |
| Wear Factor "k" x 10-10 | 315 | in.3-min/ft.lbs.hr |
| Thermal Properties | ||
| Coefficient of Linear Thermal Expansion (-40°F to 300°F) | 2 x 10-5 | in/in./°F |
| Heat Deflection Temperature 264 psi | 534 | °F |
| TG-Glass transition (amorphous) | 527 | °F |
| Meltin Point (Crystalline) peak | N/A | °F |
| Continuous Service Temperature in Air (Max.) (1) | 500 | °F |
| Thermal Conductivity | - | BTU-in/hr-ft²-°F |
| Electrical Properties | ||
| Dielectric Strength, Short Term | - | Volts/mil |
| Surface Resistivity | >1013 | ohm/square |
| Dielectric Constant, 106 Hz | - | |
| Dissipation Factor, 106 Hz | - | |
| Flammability @ 3.1 mm (1/8 in.) | V-0 | |
| *The values shown in these and the following charts are typical, average properties. Actual values may differ due to variations in resin formulations and processing methods. These values are obtained from sources believed to be reliable, including the resin manufactures, converters and other published sources. However, they should not be used for specification or design purposes. |
copyright © 2008 Tamshell Corp. / all rights reserved
