Products Description
EDM Graphite Electrode Block is a high-purity graphite electrode material specifically designed for electrical discharge machining (EDM), primarily used in mold EDM, electrode forming, and precision EDM applications.
Products Advanatgaes
High conductivity: Utilizes high-purity graphite raw materials (purity ≥99.9%), with a resistivity as low as 8–12 μΩ·m.
Low loss ratio: Through isostatic pressing and high-temperature graphitization, the structure is uniform and dense, resulting in a discharge loss rate 20–30% lower than ordinary graphite.
Suitable for precision molding: The fine graphite structure and controllable grain size (≤10 μm) enable high-precision CNC machining, suitable for complex cavities, detailed structures, and deep cavity electrode fabrication.
Strong thermal stability: Low coefficient of linear expansion (approximately 3–4 × 10⁻⁶/K), it is not easily deformed under high-energy discharge conditions, ensuring mold dimensional consistency and machining repeatability.
Product Applications
Mold Manufacturing Industry: Used for EDM (Electrical Discharge Machining) electrode processing in plastic molds, die-casting molds, and injection molds.
Precision Component Machining: Used for EDM machining of complex cavities, detailed electrode structures, and high-precision contours.
Automotive Molds and Components: Suitable for high-precision machining applications such as automotive body panel molds and connector molds.
Electronics and Precision Mold Industry: Used for electrode manufacturing in connector molds and precision electronic component molds.
Product Customization
Size Customization: Supports standard block material or non-standard size processing
Particle Size Grade: Fine particle / Ultrafine particle / High density grade available
Density Range: 1.70 – 1.90 g/cm³
Resistivity Grade: Customized according to discharge accuracy requirements
Pre-processing Services: CNC roughing / Semi-finishing / Finished electrode
Special Application Customization: Dedicated grades for high-speed discharge and low electrode loss
| graphite block & rod dimesions: | ||||
| Grpahite block | 610*510*210/260 | 620*520*260/300 | 700*350*230 | 950*650*310 |
| 820*420*210/260/310 | 1150*1150*290 | 1250*600*300 | 1300*700*320/350 | |
| 1350*800*350 | 1400*800*260 | 1600*800*350 | 1650*650*350 | |
| 2000*700*320 | 2200*710*540 | |||
| graphite rod | φ130*280 | φ130/140/150/160*500 | φ160*650/900 | φ180*850/900 |
| φ200*900 | φ220*900/1000 | φ240*900 | φ260*850/900 | |
| φ280*900 | φ300*850/900 | φ330*900 | φ360/400/430*1000 | |
| φ460*1000/1050 | φ500*1000/1050 | φ550*1000/1100 | φ600/650*1000 | |
| φ700*750 | φ1100*700 | φ980/1100*900 | φ1100*1100 |
Graphite block material data sheet
| W-4 | W-5 | W-6 | W-7 | W-8 | WH-5 | WH-7 | WH-8 | ||
| bulk density | g/cm³ | 1.75 | 1.85 | 1.9 | 1.82 | 1.9 | 1.68 | 1.85 | 1.9 |
| Resistivity | uΩm | 8-11 | 8-10 | 8-9 | 11-13 | 11-13 | 13-15 | 11-13 | 11-13 |
| Thermal conductivity(100℃) | W/m.k | 110-120 | 130-140 | 130-140 | 110-120 | 110-120 | 80-100 | 100-120 | 110-120 |
| Thermal expansion coefficient (room temperature - 600℃) | 10-6/℃ | 5.46 | 4.75 | 4.8 | 5.8 | 5.85 | 5.8 | 5.9 | 5.85 |
| Shore Hardness | HSD | 42 | 48 | 53 | 65 | 70 | 60 | 68 | 72 |
| Flexural strength | Mpa | 38 | 46 | 55 | 51 | 60 | 38 | 62 | 70 |
| Compressive strength | Mpa | 65 | 85 | 95 | 115 | 135 | 80 | 135 | 160 |
| Elastic modulus | GPa | 9 | 11.8 | 12 | 12 | 13 | 8.8 | 12 | 13 |
| Porosity | % | 17 | 13 | 11 | 12 | 11 | 18 | 12 | 11 |
| Ash | PPM | 500 | 500 | 500 | 500 | 500 | 500 | 500 | 500 |
| Purification of ash | PPM | 50 | 50 | 50 | 50 | 50 | 50 | 50 | 50 |
| grain size | um | 13-15 | 13-15 | 8-10 | 8-10 | 8-10 | 8-10 | 7 | 5 |
| Application | common use | common use | Continuous casting, sintering, high temperature metallurgy | EDM,Photovoltaic | EDM,Photovoltaic,GLASS | EDM | common use,EDM | EDM,Photovoltaic,GLASS |
Factory SHOW
FAQ
Q: What are the advantages of EDM graphite electrodes compared to copper electrodes?
A: Graphite is lighter, faster to process, and has lower wear, resulting in an overall processing efficiency increase of 30-50% and a lower overall cost.
Q: Are your graphite electrodes suitable for precision molds?
A: Yes. The fine-grained structure and low coefficient of expansion meet the high-precision mold discharge requirements.
Q: Can you process electrodes directly from drawings?
A: Yes, we support custom orders based on provided drawings and offer CNC precision machining and dimensional inspection services.
Q: Are your products quality inspected?
A: Each batch undergoes density, resistivity, particle size, and appearance inspection to ensure consistency.
Q: What is the minimum order quantity?
A: Standard specifications can be supplied in small batches; customized specifications are determined based on size and processing complexity.
Q: What is the typical lead time?
A: Regular stock items ship within 3-7 days; customized products typically take 10-20 days.
Q: Do you support export and long-term cooperation?
A: We support global export, providing stable bulk supply and long-term cooperation pricing support.
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