Graphite Electrodes

The current development of modern electric arc furnaces, with ever increasing capacity and higher current loads, has been made possible in large part due to the evolution of the electrode manufacturing industry in this respect. Graphite India Limited (GIL) graphite electrodes supplied by COMETAL offer excellent electrode heating performance and resistance to both thermal and mechanical shocks. These electrodes are the result of a combined effort of technological innovation together with the systematic search for high purity raw materials and the use of new manufacturing techniques.

Graphite India Limited has graphite electrodes from 75mm to 750mm diameter. You can see the different specifications, opening the catalog that we make available to you.

If you are interested in such products or if you would like to receive a specific offer, please contact us by clicking on the following link and we will come back to you without delay:

TYPICAL CHARACTERISTICS

	Unit	Graphite Electrodes	Graphite Niples
Bulk density DIN 51 918	[g/cm³]	1,66 – 1,75	1,75 – 1,86
Electrical resistivity* DIN 51 911	[μΩ-m]	4,6 – 5,8	3,0 – 4,5
Porosity DIN 51 918	[%]	14 – 22	8 – 15
Thermal conductivity according to DIN 51 908 (20º C)	[W/ºK·m]	160 – 230	220 – 300
Flexural strength* DIN 51 902	[MN/m²]	9 – 14	20 – 30
Young’s Modulus* DIN 51 934/51 915	[GN/m²]	9 – 15	19 – 28
CTE* (20 – 120º C) DIN 51 909	[10^-6/K]	0,4 – 1,0	0,2 – 0,9
*Measured values of anisotropic properties in longitudinal direction.	Diameter, length and tolerances according to IEC 60239/DIN 60239 or NEMA CGI – 2001 in special cases JIS R 7201 to 2001

NORMALIZED DIMENSIONS AND AVERAGE WEIGHTS

Ø Nominal	Dimensions			Nominal Length	Electrode Weight	Niple Weight
	Ø Typical	Tolerances
mm	mm	Max. mm	Min. mm	mm	kg	Normal kg	Long kg
400	408	409	403	1800	390	16	18
				2100	465
				2400	531
450	459	460	154	1800	500	19	22
				2100	580
				2400	663
500	510	511	505	2100	615	28	34
				2400	707
				2700	815
550	560	562	556	2100	850	35	42
				2400	965
				2700	1086
600	612	613	607	2100	1000	40	50
				2400	2400
				2700	2700
Weights shown are averages and vary depending on the tolerances of the diameter and length.

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