Items

Unit

Nominal Diameter(mm)

350-400

450-600

Specific Resistance 
(not over)

Electrode 
Nipple

μΩ.m

5.5
4.0

5.8
4.0

Bending Strength 
(not below)

Electrode 
Nipple

Mpa

10.5 
16.0

10.5 
16.0

Elastic Modulus 
(not over)

Electrode 
Nipple

Gpa

14.0 
18.0

14.0 
18.0

Bulk Density 
(not below)

Electrode 
Nipple

g/cm3

1.67 
1.76

1.67 
1.76

CTE(100-600)0C 
(not over)

Electrode 
Nipple

10-6/0C

1.5 
1.2

1.5 
1.2

Ash(not over)

Electrode
Nipple

%

0.3
0.2

0.3
0.2

Regular Power

(RP)

High Power

(HP)

Ultral High Power (UHP)

Graphite Electrodes

Graphite Electrodes

Graphite Electrodes

Bulk Density   

≥ 1.55g/cc

≥ 1.65g/cc

Specific Resistivity

≤8.0μΩ.m

≤ 6.8μΩ.m

Flexural Strength      

≥ 10.0MPa

≥ 11.0MPa

Elastic Modulus

≤10.0GPa

≤12.0GPa

Co-efficient of Thermal Expansion

≤ 2.4 x 10-6/°C

≤ 2.2 x 10-6/°C

Ash

≤ 0.5%

≤ 0.3%

Nipples

Nipples

Nipples

Bulk Density   

≥ 1.65g/cc

≥ 1.72g/cc

Specific Resistivity

≤ 6.5μΩ.m

≤ 5.5μΩ.m

Flexural Strength      

≥ 12.0MPa

≥ 14.0MPa

Elastic Modulus

≤12.0GPa

≤16.0GPa

Co-efficient of Thermal Expansion

≤ 2.0 x 10-6/°C

≤ 1.8 x 10-6/°C

Ash

≤ 0.5%

≤ 0.3%