PAI
Extremely strong, stiff, dimensionally stable plastic material often used in elevated temperature environments
PAI (polyamide-imide) is an extremely strong and stiff plastic material. It is often used in elevated temperature environments where other thermoplastics would lose their mechanical properties.
PAI is a very dimensionally stable material with an extremely low coefficient of thermal expansion (CTE) making it an excellent choice for applications that require machining to tight tolerances. It is available in a variety of formulations.
Shop for PAI
STANDARD SIZES
SHEET |
Dimensions:
12 in x 48 in |
Thickness:
0.250 in – 1 in |
ROD |
Outside Diameter:
0.394 in – 3.940 in |
OPTIONS AVAILABLE
COLOR |
Natural |
GRADES |
Bearing, Electrical |
Length, width, thickness, and diameter tolerances vary by size, by manufacturer, brand, and grade. Custom sizes available upon request.
PAI Properties and Material Options
Unfilled/Electrical Grade PAI– has extremely high dielectric strength and it is often used for applications where it functions as an electrical insulator.
Bearing Grade PAI– can be used for demanding bearing applications that require extreme loads, speeds, and/or elevated temperatures.
Typical properties of PAI
|
UNITS |
ASTM TEST |
PAI UNFILLED GRADE |
PAI BEARING GRADE |
Tensile strength |
psi |
D638 |
20,000 |
15,000 |
Flexural modulus |
psi |
D790 |
600,000 |
800,000 |
Izod impact (notched) |
ft-lbs/in of notch |
D256 |
2.0 |
0.8 |
Heat deflection temperature @ 264 psi |
°F |
D648 |
532 |
534 |
Water absorption (immersion 24 hours) |
% |
D570 |
0.4 |
0.28 |
Coefficient of linear thermal
expansion |
in/in/°Fx10-5 |
D696 |
1.7 |
1.4 |
Note: The properties reported reflect typical values for extruded PAI shapes. The properties of compression molded and injection molded PAI will vary from these values.
Values may vary according to brand name. Please ask your Curbell Plastics representative for more specific information about an individual brand.
Explore the physical, mechanical, thermal, electrical, and optical properties of PAI.
Sort, compare, and find the plastic material suited for your application using our interactive properties table.
