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PRECISION GRAPHITE ELECTRODES φ50-200mm
For small-to-medium EAF, SAF, ladle refining, and taphole opening applications.
Engineered for small-to-medium electric arc furnaces, ferroalloy submerged arc furnaces, ladle refining lines, and selected taphole opening applications. For φ50-200mm orders, JY Carbon controls raw material selection, formulation, kneading, forming, batch inspection, and drawing-based fit checks before shipment.
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
Select RP, HP, or UHP grades according to furnace load, operating current, and required property range.
| 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
For φ50-200mm electrodes, connection quality depends on drawing-based machining checks, fit review, batch inspection, and documented release before shipment.
Machining Control
End-face flatness checked against the approved drawing before final approval test.
Nipple thread and pitch matched to the confirmed size range.
Socket and nipple fit reviewed before shipment.
Machining and fit-check records kept by batch for technical follow-up.
Batch Release Checks
Grade-specific resistivity, density, and strength checks reviewed before release.
Diameter, length, and key dimensions verified against the order drawing.
Visual inspection completed before packing.
COA or agreed test records provided with shipment documents.
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.
Small Diameter
50-100mm
For small EAF, special melting, and laboratory or pilot-scale furnace use where compact diameter and connection fit are required.
Medium Diameter
100-150mm
For small-to-medium EAF, foundry, ladle refining, and selected taphole opening applications requiring confirmed grade and nipple matching.
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.
Need help selecting the right φ50-200mm grade, nipple size, or furnace fit?
Send your furnace type, target diameter, required grade or property range, nipple requirement, quantity, destination port, and inspection needs. We will reply with the relevant grade range, drawing or machining notes, and quotation basis.