|
|
|
|
Property
|
Value
|
|
|
|
|
Ultimate tensile strength
|
55 - 60
|
N mm-2
|
|
Maximum flatwise compressive strength
|
350 - 400
|
N mm-2
|
|
Compressive modulus
|
0.25 - 0.29
|
N mm-2 x 104
|
|
Maximum edgewise compressive strength
|
130 - 166
|
N mm-2
|
|
Flatwise impact strength
|
>0.534
|
N m mm-1
|
|
|
|
|
Elongation (min)
|
10 - 19
|
%
|
|
Shear strength
|
137
|
N mm-2
|
|
Modulus of elasticity (tensile)
|
0.34
|
N mm-2 x 104
|
|
|
|
|
Specific gravity
|
1.28 - 1.3
|
g cc-1
|
|
|
|
|
Hardness
|
95 - 110
|
Rockwell M
|
|
|
|
|
Coefficient of friction (dry)
|
0.15 - 0.18
|
|
|
|
|
|
Usable temperature range
|
cryogenic to + 140
|
°C |
|
Melting point
|
n/a (thermoset)
|
|
|
|
|
|
Linear expansion coefficients
|
|
|
|
Parallel to laminations
|
5 - 6
|
10-5 °C |
|
Normal to laminations
|
10 - 12
|
10-5 °C |
|
|
|
|
Water absorption to saturation
|
0.1 - 0.15
|
%
|
|
Water absorption in 24 hours
|
0.1 - 0.15
|
%
|
|
|
|
|
Bearing pressure rating
|
5.5 & 10
|
N mm-2
|
|
|
|