Properties \ Diameter in φ
Below 12
14-16
18-22
24-30
R P H P R P H P R P H P R P H P
Bulk Density g/㎤ 1.55-1.70 1.64-1.78 1.54-1.67 1.63-1.78 1.54-1.67 1.62-1.78 1.55-1.68 1.65-1.78
Real Density g/㎤ 2.20-2.24 2.21-2.24 2.21-2.24 2.22-2.25 2.21-2.24 2.22-2.25 2.21-2.24 2.22-2.25
Porosity % 23-31 20-27 24-31 20-28 24-31 20-28 24-31 20-27
Specific Resist-ance μΩm 6.5-9.5 3.5-6.5 5.0-8.0 3.5-6.5 5.0-8.0 4.0-6.5 5.0-8.0 4.0-6.5
Bending Strength kgf/㎠ 110-170 130-180 80-120 120-160 80-120 110-150 80-120 110-150
young's Modules kgf/㎟ 600-900 1000-1600 700-1000 1000-1500 700-1000 850-1400 700-1000 800-1400
Coeffic-ient of
Thermal Expans'n
x10-6/°c 0.5-3.3 0.5-3.3 0.5-1.0 0.5-1.0 0.5-1.0 0.3-1.0 0.5-1.0 0.3-1.0
Ash Content % 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2
* Coefficient of Thermal Expansion is measured at the temperature range of 100 ~ 200 C.