https://www.graptek.com/products/rp-graphite-electrode.html
RP Graphite Electrode, referred to moulded columns of graphite, are used as the high temperature conductive material for electric arc furnaces. Regular power graphite electrodes are specified with allowable current density less than 17 A/cm2. The quality of the graphite electrode determines the productivity and cost of EAF steelmaking.

As a manufacturer, we also provide UHP grade graphite electrodes and HP grade graphite electrodes for ultra high power or high power electric arc furnaces. In addition to being used in arc furnaces, graphite electrodes are also widely used in submerged arc furnaces and Ladle furnaces.

FEATURE
High current carrying capacity.
Outstanding resistance to breakage.
High resistance to oxidation and thermal shock.
Good dimension stability, not easy to deform.
High mechanical strength, low electrical resistance.
High machining accuracy, good surface finishing.
APPLICATION
Graphite electrodes are widely used for production of alloy steels, metal and other nonmetallic materials, etc.

Eccentric bottom tapping arc furnace with RP grade graphite electrodes.Eccentric bottom tapping arc furnace
A picture about the process of regular power arc furnace steelmaking.RP graphite electrode for EAF steelmaking
RP grade graphite electrodes are used in regular power electric arc furnace steelmaking.RP graphite electrode for regular power EAF
SPECIFICATION
Table 1: Technical Specification of RP Graphite Electrode
Dia.
(inch) Resistance
(≤, μ?·m) Density
(≥, g/cm3) Flexure Strength
(≥, MPa) Elastic Modulus
(≤, GPa) Ash Content
(≤, %) CTE
(100 °C – 60 °C)
(≤, 10-6/°C) Current Load
(A) Current Density
(A/cm2)
8 8.5 1.53 8.5 9.3 0.5 2.9 5000–6900 15–21
9 8.5 1.53 8.5 9.3 0.5 2.9 6100–8600 15–21
10 8.5 1.53 8.5 9.3 0.5 2.9 7000–10000 14–20
12 8.5 1.53 8.5 9.3 0.5 2.9 10000–13000 14–18
14 8.5 1.52 7.0 9.3 0.5 2.9 13500–18000 14–18
16 8.5 1.52 7.0 9.3 0.5 2.9 18000–23500 14–18
18 8.5 1.52 7.0 9.3 0.5 2.9 22000–27000 13–17
20 8.5 1.52 7.0 9.3 0.5 2.9 25000–32000 13–16
22 8.5 1.52 7.0 9.3 0.5 2.9 32000–40000 13–16
24 8.5 1.52 7.0 9.3 0.5 2.9 38000–47000 13–16
Table 2: Graphite Electrode Size & Tolerance
Diameter (mm) Length (mm)
Nominal Diameter Actual Diameter Nominal Length Tolerance Short Length
(inch) (mm) (max.) (min.) (rough spot)
8 200 205 200 197 1600 ±100 -275
9 225 230 225 222 1600
10 250 256 251 248 1600/1800
12 300 307 302 299 1600/1800
14 350 357 352 349 1600/1800
16 400 409 403 400 1600/1800/2000/2200
18 450 460 454 451 1600/1800/2000/2200
20 500 511 505 502 1800/2000/2200/2400
22 550 562 556 553 1800/2000/2200/2400
24 600 613 607 604 2000/2200/2400
SURFACE QUALITY
There should be less than two defects or holes on the electrode surface, the maximum size of which is mentioned in the below chart.
There should be no transverse crack on the electrode surface. For the longitudinal crack, the length should be less than 5% of the electrode circumference and the width should be 0.3 mm to 1.0 mm.
The width of black area on electrode surface should be less than 1/10 of the electrode circumference and the length should be less than 1/3 of the electrode.
SpecificationDefect Dimension Nominal Diameter of Graphite Electrode (mm)
300–400 450–600
Diameter (mm) 20–40
(< 20 mm should be negligible) 30–50
(< 30 mm should be negligible)
Depth (mm) 5–10
(< 5 mm should be negligible) 10–15
(< 10 mm should be negligible)