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Large Diameter Graphite Electrodes 200-600 mm
For high-current EAF steelmaking and large ladle furnace operations.
Large-diameter RP, HP, and UHP graphite electrodes matched to furnace power, joint standard, and operating practice. Diameter, nipple configuration, and agreed test values are reviewed before shipment.
APPLICATIONS FOR EAF & LF OPERATIONS
Grade, diameter, and nipple design should be selected according to furnace power, refining practice, and operating load.
EAF Steelmaking
For scrap-based EAF melting where grade, current density, and oxidation control must match furnace power and tap-to-tap practice.
Ladle Furnace (LF)
For ladle refining lines requiring stable conductivity, joint fit, and controlled consumption during temperature correction and alloy adjustment.
Non-Ferrous Melting
For selected non-ferrous melting applications where diameter, grade, furnace load, and connection details must be confirmed before quotation.
Scrap Steel Recycling
For recycling-focused steel shops using large electrodes in continuous melting schedules with grade review before final recommendation.
KEY PARAMETERS FOR LARGE-DIAMETER ELECTRODES
Electrical loading, flexural strength, and joint accuracy should be reviewed together. Final values depend on grade, diameter, and agreed test data.
5-10 μΩ·m
Resistivity Range
For 200-600mm graphite electrodes, resistivity is reviewed by grade and diameter to support current transfer and stable furnace loading.
> 8-12 MPa
Flexural Strength
Flexural strength is checked to support handling, column stability, and thermal-stress resistance in large-diameter operation.
1:12 Taper
Nipple Accuracy
Thread and taper dimensions are checked before shipment to support aligned joints and lower connection-related risk.
GRADE REFERENCE BY DIAMETER AND POWER CLASS
Use RP, HP, or UHP selection only after confirming furnace power, diameter, current load, and operating practice.
| Parameter | RP Grade Regular Power |
HP Grade High Power |
UHP Grade Ultra High Power |
|---|---|---|---|
| Diameter Range | 200 – 600 mm | 200 – 600 mm | 200 – 600 mm |
| Apparent Density | 1.55 – 1.65 g/cm3 | 1.60 – 1.70 g/cm3 | 1.65 – 1.75 g/cm3 |
| Resistivity | 8 – 10 μΩ·m | 6 – 8 μΩ·m | 5 – 7 μΩ·m |
| Flexural Strength | >8 MPa | >10 MPa | >12 MPa |
| Elastic Modulus | >8 GPa | >10 GPa | >12 GPa |
| CTE (100–400℃) | <2.0 ×10−6 /℃ | <1.8 ×10−6 /℃ | <1.5 ×10−6 /℃ |
| Current Load | 10 – 30 A/cm2 | 20 – 40 A/cm2 | 30 – 50 A/cm2 |
Values shown are typical grade-reference ranges for technical discussion only. Final specifications must be confirmed by agreed TDS, drawing, diameter range, and batch COA before shipment.
Nipple Specifications
| Nipple Size (mm) | Thread | NIPPLE OUTER DIAMETER (MM) | Pitch Diameter (mm) | Taper |
|---|---|---|---|---|
| 76.2 × 101.6 | 6 TPI | 76.2 – 76.6 | 69.4 – 69.8 | 1:12 |
| 88.9 × 101.6 / 127.0 | 6 TPI | 88.9 – 89.4 | 81.7 – 82.3 | 1:12 |
| 98.4 × 101.6 / 127.0 | 5 TPI | 98.4 – 98.9 | 89.7 – 90.3 | 1:12 |
| 124.0 x 152.4 | 4 TPI | 124.0 – 124.7 | 113.0 – 113.8 | 1:12 |
| 152.4 × 177.8 | 4 TPI | 152.4 – 153.2 | 140.5 – 141.5 | 1:12 |
| 177.8 × 215.9 | 4 TPI | 177.8 – 178.8 | 165.0 – 166.0 | 1:12 |
| 196.0 x 215.9 / 254.0 | 4 TPI | 196.0 – 197.0 | 182.5 – 183.5 | 1:12 |
Dimensions shown are reference values for technical discussion. Final joint standard, thread type, and machining tolerance should be confirmed by drawing, nipple designation, and order specification before shipment.
STANDARD SIZES & LARGE-DIAMETER OPTIONS
Diameter range should be selected by furnace power, current density, and joint design, then confirmed by grade and operating practice.
Standard EAF Range
200-400mm
Common for standard EAF and LF programs where power input, electrode consumption, and joint fit must stay within controlled operating windows.
SPECIFICATION MATCHING & DELIVERY SUPPORT
Electrode selection depends on furnace power, joint standard, and operating practice. Commercial terms should be confirmed after size, grade, and port review.
Selection Inputs
- Diameter: 200-600 mm according to furnace power and column design
- Length: confirmed by joint system and operating practice
- Grade: RP / HP / UHP selected by power input and consumption target
- Nipple design: thread, taper, and fit confirmed by drawing or standard
- Inspection: dimensions, thread accuracy, and agreed test values before shipment
Supply & Documents
- Production planning: confirmed by grade, size mix, and order volume
- Lead time: confirmed after specification and port review
- Packaging: protective packing selected by diameter and shipment method
- Documents: TDS, batch COA, packing list, and export files as agreed
- Ports: Tianjin or Qingdao shipment coordination
Graphite electrode FAQ
What graphite electrode grade should I choose for a 200-600 mm EAF application?
RP, HP, or UHP selection should be reviewed by furnace power, current load, diameter, consumption target, and operating practice. Send your furnace parameters and target indicators for grade recommendation.
Can Jiyang Carbon supply graphite electrodes with nipples?
Yes. Nipple size, thread, taper, and fit should be confirmed by drawing, joint standard, and order specification before shipment.
Are the specification values on this page final guaranteed values?
No. The listed values are typical grade-reference ranges for technical discussion. Final values should be confirmed by agreed TDS, batch COA, drawing, and inspection requirements.
What information is needed for a graphite electrode quotation?
Please provide diameter, length, grade target, nipple standard, furnace type, monthly or annual demand, destination port, required documents, and expected shipment time.
Need help selecting RP, HP, or UHP grade for your EAF or LF line?
Send diameter, furnace power, current practice, target consumption, nipple standard, required quantity, and destination port so we can recommend a suitable specification range.