Regular Power

(RP)

High Power

(HP)

Ultral High Power (UHP)

Graphite Electrodes

Graphite Electrodes

Graphite Electrodes

Graphite Electrodes

Bulk Density   

≥ 1.55g/cc

≥ 1.65g/cc

≥ 1.68g/cc

Specific Resistivity

≤8.0µΩ.m

≤ 6.8µΩ.m

≤ 5.8 µΩ.m

Flexural Strength      

≥ 10.0MPa

≥ 11.0MPa

≥ 12.0MPa

Elastic Modulus

≤10.0GPa

≤12.0GPa

≤14.0GPa

Co-efficient of Thermal Expansion

≤ 2.4 x 10-6/°C

≤ 2.2 x 10-6/°C

≤ 1.9 x 10-6/°C

Ash

≤ 0.5%

≤ 0.3%

≤ 0.3%

Nipples

Nipples

Nipples

Nipples

Bulk Density   

≥ 1.65g/cc

≥ 1.72g/cc

≥ 1.75g/cc

Specific Resistivity

≤ 6.5µΩ.m

≤ 5.5µΩ.m

≤ 4.5 µΩ.m

Flexural Strength      

≥ 12.0MPa

≥ 14.0MPa

≥ 16.0MPa

Elastic Modulus

≤12.0GPa

≤16.0GPa

≤18.0GPa

Co-efficient of Thermal Expansion

≤ 2.0 x 10-6/°C

≤ 1.8 x 10-6/°C

≤ 1.4 x 10-6/°C

Ash

≤ 0.5%

≤ 0.3%

≤ 0.3%