UHP Graphite Electrode

HP Graphite Electrode
July 12, 2019
Carbon Electrode
July 12, 2019

Product Introduction

UHP Graphite Electrode
Physical & Chemical Properties of UHP 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 2000-2100-2250-2400-2700-3000 ±100 -100 -275
550 22 562 556
600 24 613 607
700 26 714 708 2400-2700-3000 ±100 -100 -275
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 UHP Graphite Electrodes
Item Unit Nominal Diameter
350~450 500~600 350~450 500~600
YB/T4090-2015 Measured index
Electric resistivity Electrode μΩ·m 6.2 6.0 5.5 5.5
Nipple 5.3 5.3 3.7 3.7
Flexural strength Electrode Mpa 10.5 10.5 12.0 12.0
Nipple 20.0 20.0 22.0 24.0
Young’s modulus Electrode Gpa 14.0 14.0 12.0 12.0
Nipple 20.0 20.0 18.0 18.0
Bulk Density Electrode g/cm³ 1.67 1.66 1.67-1.75 1.67-1.75
Nipple 1.74 1.75 1.80 1.81
CTE
(100℃~ 600℃)
Electrode 10-6/℃ 1.5 1.5 1.4 1.4
Nipple 1.4 1.4 1.2 1.2
Ash Content % 0.5 0.5 0.3 0.3
Note: CTE and Ash Content is only for reference
Recommended current load of UHP Graphite Electrodes
Nominal Dia. Allowable Current(A) Current Density(A/cm2)
mm inch
350 14 20000-30000 20-30
400 16 25000-40000 19-30
450 18 32000-45000 19-27
500 20 38000-55000 18-27
550 22 45000-65000 18-27
600 24 50000-75000 18-26