HTW Hochtemperatur-
Werkstoffe GmbH
Tel.: +49 (0)8271 81 86 10
Fax: +49 (0)8271 73 72
info@htw-germany.com
Physical properties
Table
SIGRADUR® K
SIGRADUR® G
Maximum service temperature (vacuum or inert gas)
°C
1000
3000
Density
g/cm3
1.54
1.42
Open porosity
%
0
0
Permeability coefficient
cm2/s
10-11
10-9
Vickers hardness
HV
340
230
Flexural strength1)
MPa
210
260
Young's modulus2)
GPa
35
35
Compressive strength1)
MPa
580
480
Specific electrical resistance (30°C)
Ωµm
50
45
Thermal conductivity (30°C)
W/(Km)
4.6
6.3
Median linear coefficient of expansion (20-200°C)
1/K
3.5·10-6
2.6·10-6
1) 4-piont-bending-test; specimen geometry: bead-molding, diameter 3mm, length 60 mm
2) specimen geometry: bead-molding, diameter 7 mm, length 10 mm
2) specimen geometry: bead-molding, diameter 7 mm, length 10 mm
