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Radel® R (PPSU)is an amorphous high performance thermoplastic offering better impact resistance and chemical resistance than polysulfone and polyetherimide (Ultem® PEI). Its natural color is (bone) white but is available in colors on a custom run basis. Radel® R offers superior hydrolysis resistance when compared to other amorphous thermoplastics as measured by steam autoclaving cycles to failure. Radel® R has virtually unlimited steam sterilizability. This makes it an excellent choice for medical devices where steam autoclaves used for sterilization. It also resists common acids and bases over a broad temperature range.

Radel® R is commonly used in sterilization trays, dental and surgical instrument handles and in fluid handling coupling and fitting applications. It is suitable for use in electronic assembly equipment and devices that must withstand soldering temperatures.

Specification Test Value Units
Specific Gravity, 73°F D792  1.29 -
Tensile Strength @ Yield, 73°F D638  11,000 psi
Tensile Modulus of Elasticity, 73°F D638  340,000 psi
Tensile Elongation (at break), 73°F D638  30 %
Flexural Strength, 73°F D790  15,500 psi
Flexural Modulus of Elasticity D790  345,000 psi
Shear Strength, 73°F D732  9,000 psi
Compressive Strength - Ultimate     psi
Compressive Strength at 2% Deformation D695   psi
Compressive Strength at 10% Deformation D695  13,400 psi
Deformation Under Load     %
Compressive Modulus of Elasticity, 73°F D695  280,000  
Compressive Strength ⊥ to Laminate (Modulus)     psi
Compressive Strength ⊥ to Laminate (Yield)     psi
Compressive Strength ⊥ to Laminate (Ultimate)     psi
Hardness, Durometer (Shore "D" scale) D2240  D80  
Hardness, Rockwell (Scale as noted) D785  M80 (R120) Rockwell M
Izod Impact, Notched @ 73°F D256 Type A  2.5 ft.lbs/in. of notch
Coefficient of Friction (Dry vs Steel) Static PTM55007    
Coefficient of Friction (Dry vs Steel) Dynamic PTM55007      -  
Maximum Static Bearing Load (P) PTM55007   psi
Maximum Unlubricated No Load Bearing Velocity (V) PTM55007   ft/minute
Maximum Limiting PV (Unlubricated) PTM55007      - psi x ft/min.
Wear Factor "K" x 10-10 PTM55010  >1,000 Cubic in.-min/ft.lbs.hr
Sand Wheel Wear/Abrasion Test     UHMW=100
Minimum Mating Surface Hardness     Rockwell (Brinnell)
Coefficient of Linear Thermal Expansion E-831(TMA)  3.10 in/in/°F x 10-5
Coefficient of Thermal Expansion // to Laminates E-831(TMA)  3.10 in/in/°F x 10-5
Coefficient of Thermal Expansion I to Laminates E-831(TMA)  3.10 in/in/°F x 10-5
Softening Point     °F
Heat Deflection Temperature 264 psi D648  405 °F
Embrittlement Temperature     °F Min.
Continuous Service Temperature in Air    300 °F Max.
Short Term Service Temperature     °F Max.
Tg-Glass Transition (Amorphous) D3418  428 °F
Melting Point (Crystalline) Peak D3418  N/A °F
Thermal Conductivity F433  2.42 BTU-in/(hr/ft2°F)
Dielectric Strength Short Term D149  360 Volts/mil
Surface Resistivity D257 >1013 ohm/cm
Volume Resistivity D257   ohm/cm
Dielectric Constant, 106 Hz D150  3.44  
Dissipation Factor, 106 Hz D150  0.0017  
Flammability @ 3.1mm(1/8 in.) UL94 UL94  V-O  
Arc Resistance     seconds
Water Absorption, Immersion 24 Hours D570 (2)  .37 %
Water Absorption, Immersion Saturation D570 (2)  1.10 %
Machinability Rating    3 1=easy, 10=difficult
Rod Diameter Availability (Off the Shelf)    .50-3.0 inches
Sheet Thickness Availability (Off the Shelf)    .25-2.5 inches