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Graphite electrodes (machined and unmachined)
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electrodes

Graphite electrodes (machined and unmachined):

RP grade 150-500 mm
HP grade 150-500 mm
UHP grade
Ferro alloys (FeMo)

item		unit	RP Diameter (mm)				HP Diameter (mm)		UHP Diameter (mm)
item		unit	75-130	150-230	250-350	400-500	150-350	400-500	200-350	400-500
Bulk Density	Electrode Nipple	g/cm³ min	≥1.58 ≥1.72	≥1.58 ≥1.72	≥1.58 ≥1.72	≥1.58 ≥1.72	≥1.65 ≥1.75	≥1.65 ≥1.75	≥1.65 ≥1.78	≥1.65 ≥1.78
Electric Resistivity	Electrode Nipple	µ?.m max	≤7.5 ≤5.0	≤7.5 ≤5.0	≤7.5 ≤5.0	≤7.5 ≤5.0	≤6.5 ≤4.0	≤6.5 ≤4.0	≤6.0 ≤4.0	≤6.0 ≤4.0
Bending Strength	Electrode Nipple	Mpa min	≥16.0 ≥18.0	≥16.0 ≥18.0	≥16.0 ≥18.0	≥16.0 ≥18.0	≥12.0 ≥16.0	≥12.0 ≥16.0	≥14.0 ≥18.0	≥14.0 ≥20.0
Young's Modulus	Electrode Nipple	Gpa max	≤8.0 ≤12.0	≤8.0 ≤12.0	≤8.0 ≤12.0	≤8.0 ≤12.0	≤10.0 ≤14.0	≤10.0 ≤14.0	≤12.0 ≤14.0	≤12.0 ≤18.0
Coefficient Thermal expansion	Electrode Nipple	10^-6 K^-1	≤2.9 ≤2.9	≤2.9 ≤2.9	≤2.9 ≤2.9	≤2.9 ≤2.9	≤2.2 ≤2.2	≤2.2 ≤2.2	≤1.4 ≤1.2	≤1.4 ≤1.2
Ash		%	≤0.25	≤0.25	≤0.25	≤0.25	≤0.25	≤0.25	≤0.2	≤0.2

Graphite electrodes are used for arc steel melting, refining, ferroalloy, ore furnaces and other electrical thermal equipment. They have wide application in metallurgical industry.



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