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Graphite ElectrodeHome > Product > Graphite Electrode
Graphite Electrode

 Graphite Electrode Specifications & Tolerance
Unit: mm
Nominal Diameter Actual Diameter(D) Nominal Length
In mm Max Min Rough spot(B)
3'' 75 77 74 72 1000/1200
4'' 100 102 99 97 1000/1200
5'' 130 131 128 126 1000/1200
6'' 150 154 151 148 1600/1800
8'' 200 205 201 197 1600/1800
9'' 225 230 225 222 1600/1800
10'' 250 256 251 249 1600/1800
12'' 300 307 302 299 1600/1800/1900/2000
14'' 350 357 352 349 1600/1800/1900/2000/2200
16'' 400 409 403 400 1600/1800/1900/2000/2200/2400
18'' 450 460 454 451 1600/1800/1900/2000/2200/2400
20'' 500 511 505 502 1800/1900/2000/2200/2400
22'' 550 562 556 553 1800/2000/2200/2400
24'' 600 613 607 604 2000/2200/2400/2700
26'' 650 663 657 654 2400/2700/3000
28'' 700 714 708 705 2400/2700/3000
Electrode length and Tolerance 
Unit: mm

Nominal Length Tolerance Shorter length tolerance
max min max min
1600 +100 -100 -100 -275
1800 +100 -100 -100 -275
1900 +100 -100 -100 -275
2000 +100 -100 -100 -275
2200 +100 -100 -100 -275
2400 +100 -100 -100 -275
2700 +150 -150 -150 -300
3000 +150 -150 -150 -300

 Size of Tapered nipples
Unit: mm
Diameter Nipple Socket Pitch
D d2 L l d1 H
Tolerance: Tolerance:
  mm in (-0.30~0) (-0.30~0) (-1~0) (0~0.3) (0~7) 8.47
3TPI 225 9″ 139.70 91.22 203.20 7 141.22 107.60
250 10″ 155.57 104.20 220.00 157.09 116.00
300 12″ 177.16 117.39 270.90 148.68 141.50
350 14″ 215.90 150.48 304.80 217.42 158.40
400 16″ 215.90 150.48 304.80 217.42 158.40
400 16″ 241.30 170.23 338.70 242.82 175.30
450 18″ 241.30 170.23 338.70 242.82 175.30
450 18″ 273.05 199.17 355.60 274.57 183.80
500 20″ 273.05 199.17 355.60 274.57 183.80
500 20″ 298.45 221.73 372.60 299.97 192.20
550 22″ 298.45 221.73 372.60 299.97 192.20
600 24″ 336.55 245.73 457.30 338.07 234.60
3TPIL 350 14″ 215.90 144.85 338.70 217.42 175.30
400 16″ 241.30 167.43 355.60 242.82 183.80
450 18″ 273.05 182.23 457.30 274.57 234.60
4TPI 200 8″ 122.24 81.48 177.80 7 115.92 94.90 6.35
225 9″ 139.70 98.94 177.80 133.38 94.90
250 10″ 152.40 109.52 190.50 146.08 101.30
300 12″ 177.80 130.69 215.90 171.48 114.00
350 14″ 203.20 149.74 254.00 196.88 133.00
400 16″ 222.25 160.32 304.80 215.93 158.40
450 18″ 241.30 179.37 304.80 234.98 158.40
500 20″ 269.88 199.49 355.60 263.56 183.80
550 22″ 298.45 228.06 355.60 292.13 183.80
600 24″ 317.50 247.11 355.60 311.18 183.80
650 26″ 355.60 268.27 457.20 349.28 234.60
700 28″ 374.65 287.32 457.20 368.33 234.60
4TPIL 300 12″ 177.80 124.34 254.00 171.48 133.00
350 14″ 203.20 141.27 304.80 196.88 158.40
400 16″ 222.25 151.86 355.60 215.93 183.80
450 18″ 241.30 170.91 355.60 234.98 183.80
500 20″ 269.88 182.55 457.20 263.56 234.60
550 22″ 298.45 211.12 457.20 292.13 234.60
600 24″ 317.50 230.17 457.20 311.18 234.60
650 26″ 355.64 251.38 558.80 349.28 285.40
700 28″ 374.65 270.39 558.80 368.33 285.40
  Remarks: Cylindrical nipples are available as per client’s request.
 
 Technical Specification RP( Regular power)
Item Unit Nominal Diameter  
(mm)
RP
≤Φ300 ≥Φ350
Resistance Electrode μΩ·m ≤8.5
Nipple ≤6.5
Bending Strength Electrode MPa ≥8.5 ≥7.0
Nipple ≥15.0
Elastic Modulus Electrode GPa ≤9.3
Nipple ≤14.0
Bulk Density Electrode g/cm3 ≥1.53 ≥1.52
Nipple ≥1.69
C.T.E. Electrode 10-6/℃ ≤2.9
Nipple ≤2.8
Ash % ≤0.5
 Allowable current load and current density (recommended) RP
Dia. RP
mm Current load
A
Current density
A/cm2
75 1000—1400 22—31
100 1500—2400 19—30
130 2200—3400 17—26
150 3000—4500 16—25
200 5000-6900 15-21
225 6000-8000 15-20
250 7000-10000 14-20
300 10000-13000 14-18
350 13500-18000 14-18
400 18000-23500 14-18
450 22000-27000 13-17
500 25000-32000 13-16
550 32000-40000 13-16
600 38000-47000 13-16
700 45000-54000 13-16
  Technical Specification HP(High power)
Item Unit Nominal Diameter
(mm)
HP-A HP-B
≤Φ400 ≥Φ450 ≤Φ350 ≥Φ400
Resistance Electrode μΩ·m ≤6.5 ≤7.5
Nipple ≤5.5 ≤6.0
Bending Strength Electrode MPa ≥10.5 ≥9.8 ≥9.0 ≥8.0
Nipple ≥16.0 ≥13.0
Elastic Modulus Electrode GPa ≤12.0 ≤12.0
Nipple ≤16.0 ≤14.0
Bulk Density Electrode g/cm3 ≥1.62 1.60 ≥1.62 ≥1.60
Nipple ≥1.73 ≥1.72
C.T.E. Electrode 10-6/℃ ≤2.4 ≤2.7
Nipple ≤2.2 ≤2.5
Ash % ≤0.3 ≤0.3
 Allowable current load and current density (recommended) HP
Dia. HP
mm Electric Arc Furnace Refining Furnace
Current load
A
Current density
A/cm2
Current load
A
Current density
 A/cm2
200 5500-9000 18-25 6000-10000 19-27
225 6500-10000 18-25 7000-10500 18-25
250 8000-13000 18-25 10000-15000 22-29
300 13000-17400 17-24 15000-20000 20-27
350 17500-24500 18-25 20000-28000 21-29
400 21500-31000 17-24 25000-35000 19-28
450 25500-39000 16-24 30000-45000 19-28
500 30000-48000 15-24 36000-54000 18-27
550 37000-57000 15-23 40000-60000 18-25
600 44000-67000 15-23 45000-65000 16-23
  Technical Specification SHP(Super high power)
 
Item Unit Nominal Diameter
(mm)
≤Φ400 ≥Φ450
Resistance Electrode μΩ m ≤6.2 ≤6.5
Nipple ≤4.5 ≤4.5
Bending Strength Electrode Mpa ≥10.5 ≥10
Nipple ≥18 ≥18
Elastic Modulus Electrode Gpa ≤14 ≤14
Nipple ≤18 ≤18
Bulk Density Electrode g/cm3 ≥1.65 ≥1.64
Nipple ≥1.75 ≥1.75
C.T.E. Electrode 10-6/℃ ≤1.5
≤1.4
≤1.5
≤1.4
Nipple
Ash Electrode ≤0.3 ≤0.3
 Allowable current load and current density (recommended) SHP
Dia. SHP
Electric Arc Furnace Refining Furnace
mm Current load
A
Current density A/cm2 Current load
A
Current density A/cm2
250 9000-14400 20-28 9200-15100 21-30
300 14000-20000 19-28 16000-23000 22-32
350 18000-26000 18-26 20500-30000 21-31
400 23000-33000 18-26 26000-38000 20-30
450 27000-42000 17-26 31000-48000 19-29
500 32000-50000 16-25 36500-51000 18-28
550 35000-55000 14-22 40000-63000 16-26
600 37000-60000 13-20 42500-70000 15-24
 Technical Specification UHP(Ultra high power)
Item
 
Unit Nominal Diameter
(mm)
UHP
≤Φ400 ≥Φ450
Resistance Electrode μΩ·m ≤5.5
Nipple ≤4.5
Bending Strength Electrode MPa ≥11.0
Nipple ≥20.0
Elastic Modulus Electrode GPa ≤14.0
Nipple ≤18.0
Bulk Density Electrode g/cm3 ≥1.66 ≥1.67
Nipple ≥1.75
C.T.E. Electrode 10-6/℃ ≤1.5
Nipple ≤1.4
Ash % ≤0.3
 Allowable current load and current density (recommended) UHP
 
Dia. UHP
Electric Arc Furnace Refining Furnace
mm Current load
A
Current density A/cm2 Current load
A
Current density A/cm2
250 9200-15100 21-30 12000-18000 25-36
300 13000-22000 20-30 15300-22400 21-31
350 23000-32000 24-33 26000-35000 27-36
400 28000-41000 22-32 31000-44000 24-34
450 34000-48500 21-30 36000-49500 22-31
500 40000-58000 20-29 42000-60500 21-30
550 46000-65000 19-27 49000-70000 20-29
600 52000-75000 18-26 56000-81000 19-28