graphite electrode for EAF/ LF usage

1. LINKING STEEL HONGKONG CO., LIMITED
BEIJING SUMMIT STEEL CO., LTD.
HEBEI DATONG CARBON TRADE CO.,LTD.
- 1 -
GRAPHITE ELECTRODE
Technical specification
1. Definition and category
A graphite electrode is defined as an electrode that is employed to offer high level of
electrical conductivity and the capability to sustain extremely high level of dissipated heat.
Graphite electrodes are primarily utilized in the manufacturing of electric arc furnace (EAF)
steel and refinement of steel, and the equivalent smelting process, like silicon,
ferro-alloy, white phosphorus/ yellow phosphorus and etc.
By Product , graphite electrode can be classified as: Ultra-high Power (UHP), High Power
(HP), Regular Power (RP);
By Application, it’s usually defined as Electric Arc Furnace (EAF), Ladle Furnace (LF) &
Others.

2. LINKING STEEL HONGKONG CO., LIMITED
BEIJING SUMMIT STEEL CO., LTD.
HEBEI DATONG CARBON TRADE CO.,LTD.
- 2 -
2. Manufacturing process
3. Production facility
3.1 Raw materials storage/grinding/classifying/automatic mixing system

3. LINKING STEEL HONGKONG CO., LIMITED
BEIJING SUMMIT STEEL CO., LTD.
HEBEI DATONG CARBON TRADE CO.,LTD.
- 3 -
3.2 Main stream:3500 tons vertical tamping, horizontal extruder
3.3 18 Chamber Ring-type baking furnace

4. LINKING STEEL HONGKONG CO., LIMITED
BEIJING SUMMIT STEEL CO., LTD.
HEBEI DATONG CARBON TRADE CO.,LTD.
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3.4 Impregnating by horizontal dipping tank
3.5 Graphitising within 20000KVA LWG graphitising furnace
3.6 Machining process by Computer numerical control machine

5. LINKING STEEL HONGKONG CO., LIMITED
BEIJING SUMMIT STEEL CO., LTD.
HEBEI DATONG CARBON TRADE CO.,LTD.
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3.7 Lab for QC from raw materials input to finished product output
3.8 Final size check/packing with reinforced wooden pallets

6. LINKING STEEL HONGKONG CO., LIMITED
BEIJING SUMMIT STEEL CO., LTD.
HEBEI DATONG CARBON TRADE CO.,LTD.
- 6 -
4. Typical property of graphite electrode
Properties Unit
Nominal Diameter Of Electrode
UHP HP RP
300-600mm 650-800mm 300-800mm 300-800mm
Typical Value Typical Value Typical Value Typical Value
Specific electrical
resistance ≤
Electrode
µΩ.M
4. 8-5.8 4. 6-5. 8 5. 8-6. 6 7. 8-8. 8
Nipple 3. 8-4. 5 3. 8-4. 5 4. 2-5. 0 5. 0-6. 5
Flexural/Bending
strength ≥
Electrode
Mpa
10. 0-14.0 10. 0-14.0 10. 0-13.0 7.0-12.0
Nipple 20.0-26.0 20. 0-26. 0 18.0-22.0 15.0-20.0
Young' s
modulus/Elastic
Modulus ≤
Electrode
Gpa
9.0-13.0 10. 0-14.0 8. 0-12.0 7. 0-9. 3
Nipple 15. 0-18.0 15.0-18.0 14.0-16.0 12.0-14.0
Bulk Density
≥
Electrode
g/cm3
1.68-1.74 1.70-1.74 1.62-1.66 1.53-1.56
Nipple 1.77-1.82 1.78-1.84 1.74-1.80 1.70-1.74
CTE(100-600℃)
≤
Electrode
10 -6 /℃
1.1-1.4 1.1-1.4 1.6-1.9 2. 2-2. 6
Nipple 0. 9-1.2 0. 9-1.2 1.1-1.4 2. 0-2. 5
Ash content ≤ % 0.2 0.2 0.3 0.5
Note:The figures given above are typical properties for representative products, other tailored product are available upon
request.

7. LINKING STEEL HONGKONG CO., LIMITED
BEIJING SUMMIT STEEL CO., LTD.
HEBEI DATONG CARBON TRADE CO.,LTD.
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5. Graphite electrode size table
规格（英寸）
Specifications(inch)
直径允许范围（mm) Allowable Diameter(mm) 长度允许范围（mm) Allowable Length(mm)
公称直径
Nominal Diameter
最大
Max.
最小
Min.
公称长度
Nominal Length
最大
Max.
最小
Min.
10 250 256 251 1800 1875 1700
12 300 307 302 1800 1875 1700
14 350 357 352
1600 1700 1500
1800 1875 1700
16 400 409 403
1600 1500 1500
1800 1875 1700
2100 2175 1975
18 450 460 454
1800 1875 1700
2100 2175 1975
2400 2475 2275
20 500 511 505
1800 1875 1700
2100 2175 1975
2400 2475 2275
22 550 562 556
2100 2175 1975
2400 2475 2275
24 600 613 607
2100 2175 1975
2400 2475 2275
2700 2850 2550

8. LINKING STEEL HONGKONG CO., LIMITED
BEIJING SUMMIT STEEL CO., LTD.
HEBEI DATONG CARBON TRADE CO.,LTD.
- 8 -
6. Standard sizes of nipples and sockets
Nominal
Electrode Diameter
(mm) (inch)
Thread
Designation
Diameter Max.
(mm)
Length Max.
(mm)
Depth of
socket Min.
(mm)
Average
Weight(kg)
Other Designation
IEC Diameter Length
3TPI
(8.467mm)
（Pich of
Thread:
8.467mm）
250 10 10T3 155.57 220.00 116.00 5.0 N155T3N 6.125 8.66
300 12
10T3 155.57 220.00 116.00 5.0 N155T3N 6.125 8.66
12T3 177.16 270.90 141.50 8.2 N177T3N 6.975 10.66
350 14
12T3 177.16 270.90 141.50 8.2 N177T3N 6.975 10.66
14T3 215.9 0 304.80 158.40 14.5 N215T3N 8.5 12
14T3L 215.9 0 355.60 183.80 17.0 N215T3L 8.5 14
400 16
14T3 215.9 0 304.80 158.40 14.5 N215T3N 8.5 12
14T3L 215.9 0 355.60 183.80 17.0 N215T3L 8.5 14
16T3 241.30 338.70 175.30 20.5 N241T3N 9.5 13.33
16T3L 241.30 355.60 183.80 21.0 N241T3L 9.5 14
450 18
16T3 241.30 338.70 175.30 20.5 N241T3N 9.5 13.33
16T3L 241.30 355.60 183.80 21.0 N241T3L 9.5 14
18T3 273.05 355.60 183.80 28.0 N273T3N 10.75 14
18T3L 273.05 457.20 234.60 34.0 N273T3L 10.75 18
500 20
18T3 273.05 355.60 183.80 28.0 N273T3N 10.75 14
18T3L 273.05 457.20 234.60 34.0 N273T3L 10.75 18

9. LINKING STEEL HONGKONG CO., LIMITED
BEIJING SUMMIT STEEL CO., LTD.
HEBEI DATONG CARBON TRADE CO.,LTD.
- 9 -
20T3 298.45 372.50 192.20 36.0 N298T3N 11.75 14.66
4TPI
(6.35mm )
(Pitch of Thread:
6.350mm)
250 10 10T4 152.40 190.50 101.30 - - - -
300 12 12T4 177.80 215.90 114.00 7.2 N177T4N 7 8.5
350 14 14T4 203.20 254.00 133.00 11.2 N203T4N 8 10
400 16
16T4 222.25 304.80 158.40 15.5 N222T4N 8.75 12
16T4L 222.25 355.60 183.80 17.4 N222T4L 8.75 14
18T4 241.30 304.80 158.40 19.0 N241T4N 9.5 12
18T4L 241.30 355.60 183.80 21.0 N241T4L 9.5 14
450 18
18T4 241.30 304.80 158.40 19.0 N241T4N 9.5 12
18T4L 241.30 355.60 183.80 21.0 N241T4L 9.5 14
20T4L 269.88 457.20 234.60 33.4 N269T4N 10.625 18
500 20
20T4 269.88 355.60 183.80 27.2 N269T4N 10.625 14
20T4L 269.88 457.20 234.60 33.4 N269T4N 10.625 18
550 22
22T4 298.45 355.60 183.80 35.0 N298T4N 11.75 14
22T4L 298.45 457.20 234.60 42.5 N298T4L [11.75 18
600 24
24T4 317.50 355.60 183.80 40.0 N317T4N 12.5 14
24T4L 317.50 457.20 234.60 48.0 N317T4L 12.5 18
7. Graphite electrode operation current
公称直径(mm)
Nominal
Diameter
允许电流负荷（A） Operation Current (Ampere)
普通功率
石墨电极
RP Electrode
浸渍石墨电极
Impregnated
Electrode
高功率石墨电极
HP Electrode
高功率石墨
电极 II 型
Type II HP
超高功率
石墨电极
UHP Electrode
75 1000～1400 1300～2000 —— —— ——
100 1500～2400 1800～3000 —— —— ——
130 2200～3400 2800～4200 —— —— ——
150 3000～4500 4000～5000 —— —— ——
200 5000～6900 4800～9000 5500～9000 —— ——
250 7000～10000 8000～12000 8000～13000 —— ——
300 10000～13000 11000～16000 13000～17400 —— 15000～22000
350 13500～18000 15000～22000 17400～24000 19000～28000 20000～30000
400 18000～23500 20000～28000 21000～31000 23000～35000 25000～40000
450 22000～27000 24000～34000 25000～40000 30000～42000 32000～45000
500 25000～32000 28000～42000 30000～48000 35000～50000 38000～55000
550 28000～36000 —— 34000～55000 —— 45000～65000
600 35000～41000 —— 38000～61000 —— 50000～75000
700 39000～48000 —— 45000～75000 —— 60000～100000
Note: On EAF, the current should be reduced by 10%; On LF, the current should be increased by 10%

10. LINKING STEEL HONGKONG CO., LIMITED
BEIJING SUMMIT STEEL CO., LTD.
HEBEI DATONG CARBON TRADE CO.,LTD.
- 10 -
8. Suggested moment of force for tightening electrode by torque wrench
Diameter of Electrode
mm
Moment of
force N·m
250 390
300 590
350 830
400 1075
450 1375
500 1770
550 2460
600 3440
650 4520
700 6000
9. Storage/usage Instructions
9.1 Graphite electrode should avoid the moisture, the dust,the contamination and collision.
9.2 . You should be careful when moving and pilling electrode with forklift.
Collision and overload is forbidden to avoid slide or breakage.
9.3. When loading and unloading with bridge crane, operator must follow instruction accordingly . No
standing under crane.

11. LINKING STEEL HONGKONG CO., LIMITED
BEIJING SUMMIT STEEL CO., LTD.
HEBEI DATONG CARBON TRADE CO.,LTD.
- 11 -
9.4. Electrode should be stored in clean and dry place，when pilling up outdoors， it
should be covered with rain-proof tarpaulin.
9.5. When lift electrode, use revolved resilient hanger and put soft truss pad under the electrode nipple to
avoid breakage of thread.
9.6. Before connecting, clean electrode threads and sockets with compressed air.
9.7. Lift the electrode to furnace, using hoister with resilient hanger, find out the center and move slowly
downwards.
9.8. Clean small opening with compressed air when upper and lower electrodes declined to gap between
20-30mm.
9.9 Use special torque wrench to tighten according to suggested moment of force as per the specifications
given in the table; mechanical way, hydraulic pressure or wind pressure equipment should be available for
need in case.
9.10. Electrode clamp holder must be placed between the two white guard lines. Clamp holder and interfaces
of the electrode must be cleaned regularly with the allowed good touch. Cooling water jacket of the clamp
holder should be tight to prevent water leakage.
The upper and of electrode should be covered in order to avoid oxidation and dust.
9.11. To avoid the electrode breakage, insulating materials should NOT be put into the furnace The working
current of electrode must NOT exceed the max. allowed current.
9.12. In order to avoid electrode breakage, during materials feeding in furnace, put the large materials in
lower part and small materials in upper part.
Thanks for considering us as your supplier for graphite electrode, we are always closely working
with all our plants and other partners and try to deliver satisfying product and service to you.
Thanks for your trust and choice of our graphite electrode.
Denis
LINKING STEEL HONGKONG CO., LIMITED
BEIJING SUMMIT STEEL CO., LTD.
HEBEI DATONG CARBON TRADE CO.,LTD.
Tel: +86-10-87151618
Fax: +86-10-87151886
Mobile/Wechat/Whatsapp: +8618618307198
Email: denis@summitsteel.co
Website: www.summitsteel.co