Torlon® 4203L Polyamide/imide Balls

Torlon 4203L Polyamide/imide Balls are a range of polymer balls available from Goodfellow. Available in 2 variations, 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.

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Tolerance

Properties

Reference & Citations

each

Tolerances

Ball/Sphere

Diameter	Standard	±5%
Diameter	Precision	See Item

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