PRECISION GRAPHITE ELECTRODES φ50-200mm
For small-to-medium EAF, SAF, ladle refining, and taphole opening applications.
JY Carbon supplies graphite electrodes in the 50–200 mm range. Send your furnace application, operating current, electrode dimensions and socket/nipple drawing so the proposed grade and connection can be reviewed against your requirements. JY Carbon performs kneading and forming in-house, works with qualified partners for calcination, baking and graphitization, and controls batch inspection and release against the agreed requirements.
Engineered for Small-to-Medium Furnace Applications
The φ50–200mm range is selected by furnace type, operating current, grade requirement, nipple design, and inspection record. Final application fit should be confirmed against the agreed drawing and product grade.
Electric Arc Furnace — Small & Mid-Scale
For small and mid-scale EAF operations where diameter, grade, resistivity range, and nipple fit need to match operating current and furnace practice.
Specialty Alloy & High-Purity Smelting
For specialty alloy smelting where ash content, resistivity, and batch consistency should be agreed before order confirmation and checked by shipment records.
Precision Foundry & Ladle Furnace Use
For compact foundry and ladle refining operations where small-diameter electrodes require stable dimensions, grade selection, and connection checks.
Taphole Opening Electrode — SAF
For selected SAF taphole opening applications in calcium carbide or industrial silicon operations. Diameter, grade, and use conditions should be confirmed before quotation.
KEY CHECKS FOR φ50-200mm ELECTRODES
For small-diameter graphite electrodes, machining fit, strength, and electrical consistency should be checked together before release.
Drawing-confirmed value
End-Face Flatness
End-face flatness is checked against the confirmed drawing to support face contact and reduce assembly mismatch risk.
Drawing-confirmed value
Nipple-Fit Tolerance
Nipple-fit tolerance is reviewed against the current drawing to support thread matching and stable assembly.
Specification-confirmed value
Flexural Strength
Flexural strength is checked by grade to assess handling resistance and furnace suitability before shipment.
GRADE OPTIONS FOR φ50-200mm ELECTRODES
What information is needed to select a 50–200 mm graphite electrode?
Provide the furnace application, normal and maximum operating current, required diameter and length, approved grade where specified, and the complete socket/nipple connection drawing. Confirm the drawing revision, inspection requirements and compatibility with existing stock before final order approval. Diameter alone is not enough to confirm the grade or connection.
- Furnace and duty: furnace model, process or intended use, operating current and relevant operating conditions.
- Electrode dimensions: diameter, length, holder constraints and the approved dimensional drawing.
- Socket and nipple: connection designation, drawing revision, thread form, pitch, taper where applicable and inspection requirements.
- Material requirements: approved grade, test properties and methods, and customer acceptance targets.
- Delivery scope: quantity, nipple supply arrangement, packaging, destination port and requested delivery schedule.
Review the nipple and thread ordering checklist and graphite electrode inspection documents. Use the RP, HP and UHP table below alongside the agreed furnace, drawing and acceptance requirements.
| Parameter | RP Grade Regular Power |
HP Grade High Power |
UHP Grade Ultra High Power |
|---|---|---|---|
| Diameter Range | 50 – 200 mm | 50 – 200 mm | 50 – 200 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°C) | <2.0 ×10−6 /°C | <1.8 ×10−6 /°C | <1.5 ×10−6 /°C |
Property values must be confirmed by the approved TDS, agreed order standard, drawing, and pre-shipment test record. Do not use this table as a final quality commitment before technical confirmation. record.
NIPPLE SIZE & THREAD REFERENCE
Thread type, taper, and key dimensions for the current φ50-200mm range. Final machining details should follow the confirmed drawing and nipple standard.
| Nipple Size (mm) | Thread | Drawing Dimension A (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 |
Thread, taper, and dimension values must be checked against the latest approved drawing before order confirmation and production release.
MACHINING CONTROL & BATCH RELEASE
Machining Control
Batch Release Checks
Release decision is based on the agreed grade, drawing, and inspection record.
SIZE RANGE BY APPLICATION
Choose the diameter range according to furnace size, current demand, connection design, and operating practice.
50-100mm
100-150mm
150-200mm
CONNECTION CONTROL NOTES
Connection performance depends on thread accuracy, fit review, and correct installation practice for the selected nipple and electrode size.
Machining & Fit Checks
- Nipple material and grade matched to the confirmed electrode order.
- Tolerance reviewed against the current drawing.
- Thread quality checked before packing.
- Contact surfaces visually inspected before release.
- Storage protection confirmed when anti-oxidation coating is requested.
Installation & Use Notes
- Use the matched nipple type and size for the selected electrode.
- Follow the agreed tightening and handling practice during assembly.
- Check connection surfaces for handling damage before use.
- Keep electrodes and nipples dry during storage and installation.
- Request the latest drawing or technical note if your furnace setup differs from the standard range.
50-200mm Graphite electrode FAQ
What applications are φ50-200mm graphite electrodes used for?
How should I choose RP, HP, or UHP graphite electrodes?
Can JY Carbon supply matched nipples for small-diameter graphite electrodes?
Yes. JY Carbon can supply matched nipples against the agreed connection drawing. Electrode diameter alone does not establish compatibility: review the electrode socket and nipple together, including thread form, pitch, taper where applicable, dimensions, tolerances and drawing revision. Confirm component identification and the agreed fit-inspection requirements before order approval, especially when combining new supplies with existing stock. Follow the approved connection and handling procedure for the intended furnace.
What inspection items are checked before shipment?
Are all graphite electrode processes completed in-house by JY Carbon?
JY Carbon controls raw material selection, formulation, kneading, forming, inspection, and batch accountability. Calcination, baking, and graphitization are handled by qualified processing partners under documented requirements, process records, sampling review, and final inspection before shipment.
What information should I send to get a technical quotation?
Please send the required diameter, length, grade, nipple type, furnace application, monthly or annual demand, destination port, inspection requirement, and any current TDS, COA, drawing, or supplier data. This helps us review the suitable grade range, machining requirement, packing plan, and quotation basis.
Need help selecting the right φ50-200mm grade, nipple size, or furnace fit?
Please send the furnace application, normal and maximum operating current, electrode diameter and length, required grade or target properties, socket/nipple drawing and revision, quantity, destination port and requested delivery timing. Include the inspection requirements and state whether matched nipples are needed or existing stock must be reviewed. We will identify any missing information before confirming the grade, connection and quotation basis.