Carbon electrodes

Carbon electrodes

Carbon electrodes

GRADESGRAPHITEANTHRACITE
Carbon electrode, Grade A (MCM-A) 50% 50%
Carbon electrode, Grade C (MCM-C) 55% 45%
Carbo-graphitic electrode (MCGM) 80% 20%
Graphitized electrode (MGM) Graphitized (petroleum coke + pitch) 

 

Typical dimensions of carbon electrodes

NOMINAL DIAMETER NOMINAL LENGTH APPROXIMATE WEIGHT PER PIECE
mmINCHESmmINCHESkg
610 24 2350 93 1050
890 35  2700 106 2450
900  35,5  2700 106 2500
904 35,5 2700 106 2550
960 38  2700  106 2850
1016 40  2500 98 2900
    2700 106 3150
1018 40 2700 106 3200
1060 42 2700 106 3400
    2900 114 3600
1146 45 2900 114 4350
1205 47 3000 118 4900
1272 50 2700 106 4900
    2900 114 5300
1320 52 2900 114 5600
1397 55 2900 114 6000

 

Typical properties of carbon electrodes

CARBON ELECTRODESUNITGRADE
MCM-AMCM-CMCGMMGM
Specific electrical resistivity, max μΩm 35 30 25 15
Breaking strength, min MPa 3,0 3,0 4,0 3,5
Bending Strength, min MPa 6,0 6,0 8,5 7,0
Total porosity, max % 20 20 24 28
Thermal conductivity, min W/(m·K) 10 11 20 80
Coefficient of thermal expansion, (t 20–520°С), max * 10-6 К-1 at 20°C 3,6 3,5 3,5 3,4
Apparent density, min g/сm3 1,58 1,56 1,58 1,59
Ash content, max % 2,5 2,5 1,6 1,5

 

Recommended joining torque

ELECTRODE DIAMETER, ММTORQUE, KN × M
CARBONGRAPHITIZED
610 11,5 – 14,6 10,5 – 11,6
890 22,3 – 29,1 22,3 – 26,2
900 22,3 – 29,1 22,3 – 26,2
904 23,3 – 29,1 22,3 – 26,2
960 30,1 – 32,0 29,1 – 31,1
1016 33,0 – 36,9 31,1 – 35,0
1018 33,0 – 36,9 31,1 – 35,0
1060 35,0 – 40,8 33,0 – 38,8
1146 43,7 – 46,6 41,7 – 45,6
1205 50,5 – 55,3 49,5 – 54,4
1272 56,3 – 61,2 54,4 – 59,2
1320 56,3 – 63,1 54,4 – 61,2