GENERAL DESCRIPTIONDuratron ® T 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 ® T PAI stock shapes provide greater compressive strength and higher impact resistance than most advanced engineering plastics. Its extremely low coefficient of linear thermal expansion and high creep resistance deliver excellent dimensional stability over its entire use range. PAI is an amorphous material with a Tg (glass transition temperature) of 537°F (280°C).
Depending upon the method used to produce a stock shape (sheet, rod, or tube), the properties of the resulting material can vary. Generally speaking, the best mechanical properties are exhibited by injection molded material. However, the process used is generally defined by the size and shape of the desired material. For example, small diameter rod and thin sheets are extruded -- larger shapes are compression molded. See the following descriptions and properties table for details.
DURATRON ® BEARING GRADESDuratron T4301 PAI (Extruded)
Duratron ® T4301 extruded PAI is primarily used for wear and friction parts. This grade contains 12% graphite powder and 3% PTFE for a very low expansion rate, low coefficient of friction and little or no slip-stick in use. This grade excels in severe service wear applications such as non- lubricated bearings, seals, bearing cages and reciprocating compressor parts.
Extruded Duratron ® T4301 PAI is typically only available in thin sheets and small diameter rods. Check with us for availability of T4301 in the size you need.
Duratron T4501 PAI (Compression Molded)
Duratron ® T4501 compression molded PAI is the same formulation as T4301, but has been made into stock shapes using a different manufacturing process. The resulting material is similar to T4301, but has slightly different mechanical properties (see datasheet below).
Compression-molded Duratron ® T4501 PAI is typically available only in larger diameter rods (in short lengths), thicker sheets, and large (but short length) tubes. Check with us for availability of T4501 in the size you need.
Duratron T4275 PAI (Compression Molded)
Duratron ® T4275 compression molded PAI is a wear-resistant grade of polyamide-imide (PAI). With 20% graphite and 3% PTFE fillers, T4275 offers lower friction and increased wear resistance as compared with other Duratron T PAI bearing grades above. This specially-blended grade offers an excellent balance of mechanical properties and wear resistance. It offers high tensile strength and modulus with a low coefficient of friction and outstanding wear resistance at both high velocity and high pressure conditions.
Duratron T4435 PAI (Compression Molded)
Duratron ® T4435 PAI is specifically designed to provide exceptionally low wear performance in non-lubricated applications even at high pressure and velocity (PV) conditions. This specially-blended grade contains a proprietary formula of carbon fiber, graphite, mica and PTFE fillers, It offers the best possible advantages of lower friction and increased wear resistance as compared with other Duratron T PAI bearing grades above. Not only is Duratron T4435 PAI particularly suited to applications where lubrication is impossible or undesirable, it provides an additional margin of safety for lubricated systems in the event that lubrication is lost.
NOTE: Duratron T4275 and T4435 specialty bearing grades above are NOT AVAILABLE FROM STOCK, but rather can be offered ONLY BY SPECIAL ORDER ... long leadtimes and large minimum order quantities may apply when ordering these grades in sheet or rod forms.
For a complete overview of Quadrant's Duratron product family, including other high-performance engineering plastics, see this page.
TYPICAL PROPERTIES of DURATRON® T BEARING GRADE POLYAMIDE-IMIDE
|ASTM or UL test||Property||Duratron T4301 PAI
|Duratron T4501 PAI
|D570||Water Absorption, 24 hrs (%)||0.4||0.3|
|D570||Water Absorption, Saturation (%)||1.5||1.5|
|D638||Tensile Strength (psi)||15,000||10,000|
|D638||Tensile Modulus (psi)||900,000||440,000|
|D638||Tensile Elongation at Break (%)||3.0||3.0|
|D790||Flexural Strength (psi)||23,000||20,000|
|D790||Flexural Modulus (psi)||800,000||650,000|
|D732||Shear Strength (psi)||16,400||-|
|D695||Compressive Strength (psi)||22,000||16,000|
|D695||Compressive Modulus (psi)||950,000||359,000|
|D256||IZOD Notched Impact (ft-lb/in)||0.8||0.5|
|PTM 55007||Coefficient of Friction (Dry vs. Steel) Dynamic||0.20||0.20|
|PTM 55007||Limiting PV (4:1 Safety Factor) (ft-lb-in2-min||22,500||22,500|
|PTM 55010||Wear Factor "k" x 10-10(in3-min/ft-lb-hr||10||4.5|
|D696||Coefficient of Linear Thermal Expansion
(x 10-5 in./in./°F)
|D648||Heat Deflection Temp (°F / °C)
at 264 psi
534 / 277
534 / 277
|D3418||Glass Transition Temp (°F / °C)||527 / 275||527 / 275|
|-||Max Operating Temp (°F / °C)||500 / 260||500 / 260|
(x 10-4 cal/cm-sec-°C)
|D149||Dielectric Strength (V/mil) short time, 1/8" thick||-||-|
|D150||Dielectric Constant at 1 MHz||6.0||6.0|
|D150||Dissipation Factor at 1 MHz||0.037||0.042|
|EOS/ESD S11.11||Surface Resistivity (ohms/square)||> 1013||> 1013|
NOTE: The information contained herein are typical values intended for reference and comparison purposes only. They should NOT be used as a basis for design specifications or quality control. Contact us for manufacturers' complete material property datasheets.DURATRON is a registered trademark of Quadrant Engineering Plastic Products.
All values at 73°F (23°C) unless otherwise noted.