CPC GPC
December 12, 2025
Graphite Electrodes
Product Overview
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Product Name: RP Grade Graphite Electrode
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Brand: Rubang Carbon
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Model Number: RB-RP-1
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Type: Graphite Electrode
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Grade: RP (Regular Power) A/B
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Place of Origin: Hebei, China
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Color: Black
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Nipple Thread: 3TPI
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Raw Material: Needle Petroleum Coke
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Primary Application: Steel Smelting
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Length Range: 800 ~ 1500 mm
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Key Superiority: Low Consumption Rate
Chemical & Physical Properties
Standard Chemical Composition
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Fixed Carbon: ≥ 99%
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Volatile Matter: ≤ 0.5%
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Ash: ≤ 0.5%
General Physical Characteristics
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Electrical Resistance: 6 – 9 μΩ·m
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Apparent Density: 1.58 – 1.75 g/cm³
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Coefficient of Thermal Expansion (100–600℃): 1.5 – 2.5 ×10⁻⁶/℃
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Flexural Strength: 8 – 12 MPa
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Elastic Modulus: 8.50 – 15.50 GPa
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Current Carrying Capacity: 1 – 8 kA
Graded Physical Index (By Diameter)
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RP Graphite Electrodes-Physical & Chemical Index |
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Description |
Type |
Unit |
Nominal Diameter (mm) |
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Ø75 – 200 |
Ø250 – 350 |
Ø400 – 500 |
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Excellent |
First |
Excellent |
First |
Excellent |
First |
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|
A |
B |
A |
B |
A |
B |
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Electrical Resistance(≤) |
Electrode |
μΩ.m |
8.0 |
9.0 |
8.0 |
9.0 |
8.0 |
9.0 |
|
Nipple |
7.5 |
7.5 |
7.5 |
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Tensile Strength (≥) |
Electrode |
Mpa |
10.0 |
10.0 |
8.0 |
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Nipple |
15.0 |
15.0 |
15.0 |
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Young’s Module (≤) |
Electrode |
Gpa |
12.0 |
12.0 |
12.5 |
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Nipple |
14.0 |
14.0 |
14.0 |
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Bulk Density (≥) |
Electrode |
g/cm3 |
1.58 |
1.58 |
1.58 |
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Nipple |
1.68 |
1.68 |
1.68 |
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CTE (≤) |
Electrode |
X 10-6/℃ |
2.7 |
2.7 |
2.7 |
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Nipple |
2.5 |
2.5 |
2.5 |
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Ash |
– |
% |
0.3 |
0.3 |
0.3 |
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| Note: The Ash and Thermal Expansion coefficient are parameter indexes. | ||||||||
Production Process
Made from high-quality, low-ash materials (Petroleum Coke, Needle Coke, Coal Pitch) through a series of processes:
Calcining → Crushing → Screening → Burdening → Kneading → Forming → Baking → Impregnation → Graphitization → Precision CNC Machining.
The final product features low resistivity, excellent conductivity, low ash content, compact structure, good anti-oxidation properties, and high mechanical strength, making it an optimal conductive material for Electric Arc Furnaces and smelting furnaces.
Primary Applications
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Ladle Furnaces
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Electric Arc Furnace Steelmaking
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Yellow Phosphorus Furnaces
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Industrial Silicon Furnaces or Copper Melting Furnaces
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Other steel refining and smelting processes
Transportation, Installation & Storage Guidelines
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Storage: Keep in a clean, dry place. Avoid vibration and collision. Dry before use.
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Installation Prep: Clean the socket with compressed air before screwing in the nipple. Handle carefully to avoid thread damage.
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Electrode Connection: Clean both electrode ends with compressed air when they are 20–30 mm apart.
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Tightening: Use a wrench to tighten completely to the specified position. The gap between two electrodes should be no less than 0.05 mm.
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Fracture Prevention:
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Avoid using insulation blocks.
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Place large charge blocks in the upper part of the furnace.
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Packaging & Commercial Terms
Packaging
Packed in wooden cases/lathing and secured with metal control strips.
Business Conditions
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Price & Delivery Terms: FOB, CFR, CIF, EXW, DDP
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Payment Currency: USD, EUR, JPY, CAD, CNY, AUD
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Payment Terms: T/T, L/C, D/P, D/A, Western Union, Cash
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Loading Port: XINGANG or QINGDAO, CHINA
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