HP Graphite Electrode

RP Graphite Electrode
July 12, 2019
UHP Graphite Electrode
July 12, 2019

Product Introduction

HP Graphite Electrode
Physical & Chemical Properties of HP Graphite Electrodes
Specification and allowable deviation of graphite electrode
Nominal Diameter Actual diameter Nominal length Allowable Deviation
Short feet length
mm inch Max Min mm Length Max Min
350 14 357 352 1800-2000-2100 ±100 -100 -275
400 16 409 403
450 18 460 454
500 20 511 505 2000-2100-2250-2400-2700 ±100 -100 -275
550 22 562 556
600 24 613 607
Surface Quality

1. the electrode surface defects or holes are not more than two places, and their dimensions do not exceed the following table.
2. there are no transverse cracks on the electrode surface and 0.3-1.0mm longitudinal cracks, the length of which is not greater than 5% of the circumferential length of the electrode, and the longitudinal crack width of the electrode is not less than the longitudinal crack of 0.3mm.
3. The area of the black skin on the electrode surface: the width is less than 1/10 of the circumferential length of the electrode, and the length is less than 1 / 3 of the electrode length.

Specification
Defect size
Nominal Diameter
350-400 450-600
Diameter 20-40(<20 excluded) 30-50(<30 excluded)
Depth 5-10(<5 excluded) 10-15(<10 excluded)
Recommended current load of HP Graphite Electrodes
Item Unit Nominal Diameter
350~400 450~500 350~450 500~600
YB/T4089-2000 Measured index
Electric resistivity Electrode μΩ·m 7.0 7.5 6.0 6.2
Nipple 6.5 6.5 4.5 4.5
Flexural strength Electrode Mpa 10.5 9.8 12.0 12.0
Nipple 14.0 14.0 20.0 20.0
Young’s modulus Electrode Gpa 12.0 12.0 10.0 10.5
Nipple 16.0 16.0 16.0 16.0
Bulk Density Electrode g/cm³ 1.60 1.60 1.63-1.73 1.63-1.73
Nipple 1.70 1.70 ≥1.78 ≥1.78
CTE
(100℃~ 600℃)
Electrode 10-6/℃ 2.4 2.4 2.4 2.4
Nipple 2.2 2.2 1.8 1.8
Ash Content % 0.5 0.5 0.3 0.3
Note: CTE and Ash Content is only for reference
Recommended current load of HP Graphite Electrodes
Nominal Dia. Allowable Current(A) Current Density

(A/cm2)

mm inch
350 14 1700-24000 17-24
400 16 21000-31000 16-24
450 18 25000-40000 15-24
500 20 30000-48000 15-24