Vespel® SP-22
Vespel® SP-22 is enhanced with 40% graphite per weight, resulting in minimal thermal expansion and maximal dimensional stability. Furthermore, this grade delivers enhanced wear resistance, lower friction and oxidative stability. If the application requires very tight tolerances under severe wear (bearings, thrust washers, bushings, seal rings …), Vespel® SP-22 will prove itself an excellent solution.
DATASHEET
Property
UNIT
NORM
Value
Tensile strength (23°C)
N/mm²
DIN 53455
50
Elongation at break (23°C)
%
DIN 53455
3
Tensile modulus (23°C)
N/mm²
DIN 53457
4800
Coefficient of friction v-steel - Dynamic
--
0.3
Coefficient of thermal expansion (150-260°C)
1/K.10-5
--
4
Thermal conductivity (23°C)
W/K.m
DIN 52612
1.73
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