Graphite Electrodes | Tokai Carbon Co., Ltd.
$9.90
Product Code: G-920
Availability: In Stock
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Product Description

In the steelmaking process, iron scrap gets melted in an electric arc furnace and recycled. Graphite electrodes, a kind of conductor, are an essential component in this kind of furnace. They can melt scrap at a temperature of about 1600℃.

What are Graphite Electrodes?

Did you know that there are two ways to make iron? The blast furnace method and the electric arc furnace method. The electric arc furnace method recycles used iron scrap by melting it in an electric arc furnace. It is the graphite electrodes inside the furnace that actually melt the iron. Graphite has high thermal conductivity and is very resistant to heat and impact. It also has low electrical resistance, which means it can conduct the large electrical currents needed to melt iron. In recent years, graphite electrodes have been made even more efficient: they can now conduct even higher currents and more power. Using the expertise collected over a century of innovation, Tokai Carbon has developed the world's biggest electrodes. They measure 32 inches (about 80 cm) in diameter and are 3 meters long. Tokai Carbon's graphite electrodes are made to last, making them a trusted name in the industry.

The world's biggest graphite electrodes, 32 inches in diameter

Graphite Electrodes Varieties

For DC Furnaces (direct current furnaces) / Size: 22-32 inches

Electrodes for DC furnaces, which require 1 column of graphite electrodes. High maximum current density. The diameter of these electrodes is getting bigger: the current maximum diameter is 32 inches (801 mm).

For AC Furnaces (alternating current furnaces) / Size: 16-28 inches.

Alternating current furnaces require 3 columns of graphite electrodes. They mostly use 20-28 inch electrodes, the standard size in electric furnaces.

For LF Furnaces (refining furnaces) / Size: 10-18 inches

These electrodes are for refining materials like molten steel. LF Furnaces have a smaller capacity than DC.

Guide to Graphite Electrodes

 UnitAC FurnaceDC Furnace
350~450mm
14"~18"
500~700mm
20"~28
550~800mm
22"~32"
FeaturesRPUHPUHPUHP
Bulk densityg/cm31.58~1.701.65~1.761.66~1.741.68~1.75
Specific resistanceμΩm6.0~8.54.5~6.54.5~6.54.2~5.5
Young's moduluskN/mm28~1211~169~149~13
GPa8~1211~169~149~13
kgf/mm2800~1,2001,100~1,650950~1,400900~1,300
Bending strengthN/cm21,000~1,4001,200~1,8001,000~1,5001,000~1,500
MPa10~1412~1810~1510~15
kgf/cm2100~140120~180100~150100~150
Thermal expansion coefficient
(R.T. to 400°C)
×10-6/゚C0.8~1.50.8~1.50.5~1.00.5~0.9
×10-6/゚F0.4~0.80.4~0.80.3~0.60.3~0.5
True densityg/cm32.20~2.232.20~2.232.20~2.232.20~2.23
Total porosity23~2920~2621~2620~25
Ash contentLess than 0.2Less than 0.2Less than 0.2Less than 0.2

Size/Weight Chart

NamePole diameterPole lengthPole weight (reference value)
Diameter x lengthMaximumMinimumMaximumMinimumPole product weight (excluding nipple)
inchmmmmmmmmmmkg
14×60350×150035735215501400253
14×72350×180018751700;304
14×96350×240024752275406
16×60400×150040940315501400334
16×72400×180018751700395
16×96400×240024752275532
18×72450×180046045418751700496
18×96450×240024752275665
18×110450×270028502550766
20×72500×180051150518751700614
20×84500×210021751975715
20×96500×240024752275824
20×110500×270028502550927
22×84550×210056255621751975873
22×96550×240024752275995
24×84600×2100613607217519751040
24×96600×2400247522751190
24×110600×2700285025501340
26×110650×2700663657285025501580
28×110700×2700714708285025501830
30×110750×2700765759285025502060
32×110800×2700816810285025502450

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