Torlon 4275
Torlon 4275 is reinforced with graphite and polytetrafluoroethylene (PTFE), a synthetic, non-stick
material that can handle exposure to high temperatures. These additions give 4275 outstanding
wear, creep, and chemical resistance under high pressures and at fast velocities. It is comparable to
Torlon 4301 but offers lower wear rates at higher speeds. Torlon 4275 is most commonly used in
the automotive industry.
Applications of Torlon 4275
- Thrust washers
- Spline liners
- Valve seats
- Bushings
- Bearings
- Wear rings
- Cams
- Ball bearing spacers
- Other applications that require strength and wear resistance at high temperatures
Typical Properties of Torlon ® 4275 Bearing Grade PAI Extruded
| DETAIL | |||
|---|---|---|---|
| Description | Value | ||
| Material Type | Imidized Amorphous Thermoplastic | ||
| Chemical Name | PAI Polyamide-imide | ||
| Trade Name | Torlon® 4275 | ||
| Additives | Bearing Grade Additives | ||
| Color | Black | ||
| PHYSICAL | |||
| Property | Test | Unit of Measure | Value |
| Density | ASTM D792 | g/cm³ | 1.51 |
| ASTM D792 | lb/in³ | 0.055 | |
| Water Absorption, 24 Hours, Immersion | ASTM D570 | % by wt. | 0.5 |
| Water Absorption, Saturation, Immersion | ASTM D570 | % by wt. | 1.5 |
| MECHANICAL | |||
| Property | Test | Unit of Measure | Value |
| Tensile Strength | ASTM D638 | psi | 15,500 |
| Tensile Modulus | ASTM D638 | psi | 980,000 |
| Tensile Elongation at Break |
ASTM D638 | % | 4 |
| Flexural Strength |
ASTM D790 | psi | 22,000 |
| Flexural Modulus |
ASTM D790 | psi | 880,000 |
| Compressive Strength | ASTM D695 | psi | 21,000 |
| Compressive Modulus |
ASTM D695 | psi | 950,000 |
| Hardness | ASTM D785 | NA | Rockwell M102 |
| IZOD Impact- Notched |
ASTM D256 | ft-lb/in | 0.8 |
| THERMAL | |||
| Property | Test | Unit of Measure | Value |
| Coefficient of Linear Thermal Expansion |
ASTM D696 | x 10-5 in./in./°F | 1.4 |
| Melting Point Temp | ASTM D3418 | °C | 275 |
| ASTM D3418 | °F | 527 | |
| Max Continuous Operating Temp |
°C | 260 | |
| °F | 500 | ||
| Minimum Operating Temp | °C | -200 | |
| °F | -328 | ||
| COMPLIANCE | |||
| Description | Value | ||
| FDA | No | ||
| USDA | No | ||
| NSF | No | ||
| 3-A Dairy | No | ||
| Canadian Food Inspection Agency | No | ||
| USP Class VI | No | ||
| OTHER | |||
| Description | Value | ||
| UV Resistant | Yes | ||
| Relative Cost | $$$$$$$ | ||
| Machinability | 5 | ||