Characteristics Items

Unit

MATERIAL

HGD

MHD

Pretension Density

3.2

3.1

Bulk Density

2.58

2.8

Apparent Porosity

%

20

5

Bending Strength

MPa at 25℃

60

98

Specific Heat

kj/kg+℃ at 25℃-1300℃

1.0

1.0

Heat Conductivity

W/m+℃ at 1000℃

14-19

16-21

Nominal Resistance

Ω cm at 1000℃

0.1

0.016

Coefficient of Thermal Expansion

1000℃(X 10-6/℃)

4.5

4.5