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Identification & Functionality
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Features & Benefits
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- Materials Features
- Product Overview
- Maintains strength and stiffness to 500°F (260°C)
- Minimal expansion rate to 500°F (260°C)
- Excellent wear resistance in bearing grades
- Able to endure harsh thermal, chemical and stress conditions
With its versatile performance capabilities and proven use in a broad range of applications, Duratron® polyamide-imide (PAI) shapes are offered in extruded, injection molded, and compression molded grades.
Duratron® 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® stock shapes provide greater compressive strength and higher impact resistance than most advanced engineering plastics.
Duratron® PAI's extremely low coefficient of linear thermal expansion and high creep resistance deliver excellent dimensional stability over its entire service range. Duratron® PAI is an amorphous material with a Tg (glass transition temperature) of 537°F (280°C). Duratron® PAI stock shapes are post-cured using procedures developed jointly by BP Amoco and Mitsubishi Chemical Advanced Materials. This eliminates the need for additional curing by the end user in most situations. A post-curing cycle is sometimes recommended for components fabricated from extruded shapes where optimization of chemical resistance and/or wear performance is required.
For large shapes or custom geometries like tubular bar, compression molded Duratron® PAI shapes offer designers the greatest economy and flexibility. Another benefit of selecting a compression molded grade is that resins are cured, or "imidized" prior to molding which eliminates the need to post-cure shapes or parts fabricated from compression molded shapes.
Applications & Uses
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Properties
- Physical Properties
- Mechanical Properties
- Thermal Properties
- Electrical Properties
| Value | Units | Test Method / Conditions | |
| Specific Gravity | 1.4 | g/cc | ASTM D792 |
| Water Absorption (Immersion, 24hr) | 0.35 | % | ASTM D570(2) |
| Water Absorption (Immersion, At Saturation) | 1.7 | % | ASTM D570(2) |
| Value | Units | Test Method / Conditions | |
| Hardness | 80 | Rockwell E | ASTM D785 |
| Hardness | 119 | Rockwell M | ASTM D785 |
| Hardness | 90 | Shore D | ASTM D2240 |
| Tensile Strength | 110 | MPa | ASTM D638 |
| Tensile Strength (150°C) | 82.7 | MPa | ASTM D638 |
| Tensile Strength (65°C) | 103 | MPa | ASTM D638 |
| Elongation at Break | 3 | % | ASTM D638 |
| Tensile Modulus | 3.45 | GPa | ASTM D638 |
| Flexural Strength | 165 | MPa | ASTM D790 |
| Flexural Modulus | 4.14 | GPa | ASTM D790 |
| Compressive Strength | 124 | MPa | 10% Def.; ASTM D695 |
| Compressive Modulus | 2.41 | GPa | ASTM D695 |
| Shear Strength | 124 | MPa | ASTM D732 |
| Izod Impact (Notched) | 0.801 | J/cm | ASTM D256 Type A |
| Coefficient of Friction (Dynamic) | 0.3 | — | Dry vs. Steel; QTM55007 |
| K Factor (Wear) | 10¹⁰ x 10⁻⁸ | mm³/N-M | QTM 55010 |
| Limiting Pressure Velocity (4:1 Safety Factor) | 0.14 | MPa-m/sec | QTM 55007 |
| Value | Units | Test Method / Conditions | |
| Coefficient of Thermal Expansion (Linear, 40.0- 149 °C) | 27 | µm/m-°C | ASTM E831 |
| Thermal Conductivity | 0.259 | W/m-K | ASTM F433 |
| Maximum Service Temperature (Air) | 260 | ºC | Long Term |
| Deflection Temperature (1.8 MPa) | 278 | °C | ASTM D648 |
| Glass Transition Temperature | 275 | °C | ASTM D3418 |
| Flammability (Thickness 3.17 mm) | V-0 | — | UL94 |
| Value | Units | Test Method / Conditions | |
| Surface Resistivity (per Square) | max. 10¹³ | ohm | EOS/ESD S11.11 |
| Dielectric Constant (1 MHz) | 4.2 | — | ASTM D150 |
| Dielectric Strength | 23.6 | kV/mm | Short Term; ASTM D149 |
| Dissipation Factor (1 MHz) | 0.031 | — | ASTM D150 |
Regulatory & Compliance
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Technical Details & Test Data
- Engineering Notes
As Duratron® PAI has a relatively high moisture absorption rate (see Figure 24), parts used in high-temperature service or made to tight tolerances should be kept dry prior to installation. Thermal shock resulting in deformation can occur if moisture-laden parts are rapidly exposed to temperatures above 400°F (205°C).