Technical Data Sheet
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Torlon® 4203L Polyamide/imide Balls

Torlon 4203L Polyamide/imide Balls are a range of polymer balls available from Goodfellow. This product comes in 2 variations, with diameters ranging from 1 to 25 mm. The Torlon 4203L material offers high strength and stiffness at elevated temperatures. Potential applications for these polyamide-imide balls include bearings and bushings in high-heat environments such as aircraft engines or industrial furnaces. The balls maintain dimensional stability when exposed to temperatures up to 310°C.
Grade: Torlon® 4203L
Formula: PAI
Diameter: 3.18mm
Quantity: 10 Pcs
Type: Precision Sphere
Sphericity: 25.4µm
UOM Code: 310-352-72
SKU: 1000027694
Product Code: AM31-SP-000120


Diameter Standard ±5%
Diameter Precision See Item
No Minimum order Despatch of products in stock within 48 hours Free technical support *Free delivery worldwide

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Diameter Standard ±5%
Diameter Precision See Item
Technical Data Sheet
Safety Data Sheet

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Material Properties for Polymers

Chemical Resistance
Element Value
Acids - concentrated Fair-Poor
Acids - dilute Fair
Alcohols Good-Poor
Alkalis Poor
Aromatic hydrocarbons Good
Greases and Oils Good
Halogenated Hydrocarbons Good-Poor
Halogens Good-Poor
Ketones Good
Electrical Properties
Element Value
Dielectric constant @1MHz 3.9-5.4
Dissipation factor @ 1MHz 0.03-0.042
Dielectric strength( kV mm⁻¹ ) 23at 1mm
Surface resistivity( Ohm/sq ) 8-50 x 10¹⁷
Volume resistivity( Ohmcm ) 0.08-2 x 10¹⁷
Physical Properties
Element Value
Flammability V0
Radiation resistance Good
Resistance to Ultra-violet Good
Limiting oxygen index( % ) 44-45
Water absorption - equilibrium( % ) 03-Apr
Water absorption - over 24 hours( % ) 0.3
Density( gcm⁻³ ) 1.42-1.46
Mechanical Properties
Element Value
Hardness - Rockwell E72-86
Poisson's ratio 0.38
Elongation at break( % ) Jul-15
Tensile modulus( GPa ) 4.5-6.8
Izod impact strength( J m⁻¹ ) 60-140- notched
Tensile strength( MPa ) 110-190
Thermal Properties
Element Value
Heat-deflection temperature - 1.8MPa( C ) 278-9
Lower working temperature( C ) -200
Upper working temperature( C ) 200-260
Specific heat( J K⁻¹ kg⁻¹ ) 1000
Thermal conductivity( W m⁻¹ K⁻¹ ) 0.26-0.54@23°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 25-31
Element Value
Compressive strength( MPa ) 170-220
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