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Ultra-high power graphite electrodes

Ultra-high power graphite electrodes provided by HP GRAPHITE are mainly specialized for electric arc furnaces and ladle refining furnaces and they are praised by the customers as the rare superior type of ultra-high power graphite electrode with optimal functional quality in the industry. The graphite electrodes provided by HP GRAPHITE are produced using the most advanced technologies, in strict accordance with world standards and have reached the world-class quality standard of SGL CARBON and Tokai Carbon. 

Characteristics of ultra-high power graphite electrodes: 

  • Superior electric conductivity 
  • World-class quality 
  • Complete ex-factory inspection 
  • Rate of finished products up to 99% 
  • Complete use instructions and all-round customer service 
  • Unconditional return is provided in case of quality problem by HP GRAPHITE to completely eliminate your worries! 

Technical index of semi-ultra-high power graphite electrodes

Technical index of semi-ultra-high power graphite electrodes
Items Unit Electrode diameter 300-600mm 
Standard Measured 
Electrode Contact Electrode Contact 
The resistivity is not higher than μΩm6.2-6.55.55.0-6.54.5
The flexural strength is not lower than MPa10.51614-1618-20
The elasticity modulus is not higher than GPa14181214
The ash content is not higher than %0.30.30.30.3
The bulk density is not lower than g/cm31.64-1.651.70-1.721.72-1.751.78
The heat expansion coefficient is not higher than ×10-6/℃1.51.41.31.2

Specifications of the ultra high power graphite electrode and allowable deviation

Nominal diameter 

Specifications of the ultra high power graphite electrode and allowable deviation
Dimeter(mm)Length(mm)
Actual diameterNominal length Allowable deviation 

(mm)(in)(max)(min)mmShort ruler length 
300123073021600/1800/2000/2200
Lengthmaxmin 
35014357352±100-100-275
40016409403
45018460454
500205115051600/1800/2000/2200
±100-100-275
55022556553
60024613607

Super power graphite electrode allows current capacity

Nominal diameter 

Super power graphite electrode allows current capacity

Allowable current capacity (A)Current density (A/cm2

(mm)(in)
250109200-1510021-30
30012
13000-22000
20-30
3501420000-3000020-30
4001625000-4000019-30
4501832000-4500019-27
5002038000-5500018-27
550
48000-6000018-24
6002452000-7200018-24
7002762000-9500018-24

Ultra high power graphite electrode surface quality

1、There are no more than two defects or holes on the surface of the electrode and the size shall not exceed the value in the following table. 

2、There is no transverse crack or longitudinal crack with width of 0.3-1.0 on the surface of the electrode. The length of longitudinal crack is not more than 5% of the perimeter of the electrode. The crack with width less than 0.3mm shall be ignored. 

3、The width of black skin area on the surface of the electrode is less than 1/10 of the perimeter of the electrode and its length is less than 1/3 of the length of the electrode. 

Specification

Defect size 

Nominal diameter (mm)
300-400450-600
Diameter 20-40(<20 Not counting)30-50(<30 Not counting)
Depth 5-10(<5 Not counting)10-15(<10 Not counting)

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