Vespel® SP-21
Vespel® SP-21 is enhanced with graphite (15% per weight). This addition results in increased resistance and reduced friction. It has the incredible advantage that it can be used with our without lubrication in various applications. This makes Vespel® SP-21 a popular choice for automotive producers to use in for example thrust washers, bearings or seals. Of all graphite filled grades, Vespel® SP-21 shows the best mechanical properties.
DATASHEET
Property
UNIT
NORM
Value
Tensile strength (23°C)
N/mm²
DIN 53455
65
Elongation at break (23°C)
%
DIN 53455
5
Tensile modulus (23°C)
N/mm²
DIN 53457
3800
Coefficient of friction v-steel - Dynamic
--
0.24
Water absorption
%
DIN 53495
0.19
Dielectric strength
KV/mm
DIN 53481
10
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