Graphite Block
Graphite Block is a solid synthetic graphite material supplied in molded, extruded, isostatic, and fine grain grades for EDM electrodes, furnace fixtures, molds, metallurgical tooling, high-temperature processing, and custom machined graphite parts.
Machining Ready
High-Temperature Use
Standard or Custom Supply
MATERIAL GRADE
Molded / Extruded / Isostatic / Fine Grain
SIZE RANGE
Raw Block / Cut Block / Custom Size
BULK DENSITY / STRENGTH
Density 1.70–1.90 g/cm³ by Grade
MACHINING METHOD
CNC Machining / Cutting / Drilling / Custom Processing
PRODUCT SPECIFICATIONS AND DETAILS
Graphite Block is a solid synthetic graphite material supplied in block form for machining, high-temperature processing, EDM electrodes, metallurgical tooling, furnace components, and selected high-temperature industrial parts. Depending on the material grade and forming route, graphite blocks may be supplied as molded graphite blocks, extruded graphite blocks, isostatic graphite blocks, fine grain graphite blocks, high purity graphite blocks, or EDM graphite blocks.
Compared with graphite sheet, graphite paper, or graphite powder, Graphite Block is a more structural graphite product designed for shaping, machining, load-bearing support, and precision graphite component production. It is widely used in EDM electrode fabrication, furnace fixtures, molds, crucibles, hot-zone parts, metallurgical tooling, and custom graphite machining projects.
Table of Contents
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Material Routes and Application Logic
Graphite Block is not a single fixed material grade. Different production routes create different performance characteristics in density, grain size, machinability, electrical resistivity, strength, purity, and cost structure. For industrial buyers, choosing the correct material route is often more important than selecting a graphite block by product name alone.
| Material Route | Typical Characteristics | Typical Use |
|---|---|---|
| Isostatic / Isotropic Graphite | Fine grain, uniform structure, higher density, better dimensional consistency, and excellent machinability | EDM, precision molds, semiconductor-related graphite components, and high-end furnace parts |
| Molded Graphite | Good balance of machinability, performance, and cost, suitable for medium and larger block formats | General industrial graphite blocks, metallurgy, fixtures, molds, and custom machined parts |
| Extruded Graphite | Coarser grain direction, cost-effective supply, and practical performance for larger sections | General furnace use, larger graphite sections, selected metallurgical applications, and industrial tooling |
Recommended Grade Matrix
The following specification matrix is designed for product page presentation and inquiry guidance. The values below are typical reference ranges and may vary according to graphite grade, production route, purification level, block size, and machining requirements. Final specifications should be confirmed according to the actual application and quotation details.
| Grade Direction | Typical Applications | Recommended Specification Range |
|---|---|---|
| General Grade (EDM / Metallurgy) |
EDM electrodes, molds, metallurgy tooling, furnace fixtures, general graphite machining |
Density: 1.70–1.80 g/cm³ Electrical Resistivity: 10–15 μΩ·m Ash: ≤0.30% Typical Grain Size: 5–20 μm Material Route: Molded / Extruded / Isostatic |
| High Purity Grade (High Temperature / Contamination-Sensitive Uses) |
Selected high-purity graphite components, hot-zone parts, high-temperature furnace components, and contamination-sensitive processing environments |
Density: 1.75–1.85 g/cm³ Carbon: ≥99.9% for selected grades Ash: ≤0.05% for selected high-purity grades Typical Grain Size: 1–10 μm Electrical Resistivity: 14–20 μΩ·m Optional Purified Grade: Available upon request |
| Fine Grain Isotropic Graphite | Precision EDM, detailed molds, semiconductor-related fixtures, precision graphite plates, and custom machined graphite parts |
Particle Size: 1–10 μm Density: 1.78–1.90 g/cm³ Electrical Resistivity: 12–19.5 μΩ·m Structure: Isotropic, uniform particles Feature: Good machinability, consistent behavior, and better dimensional precision |
Technical Parameter Summary
| Item | Typical Product Direction |
|---|---|
| Product Name | Graphite Block |
| Alternative Names | Carbon Graphite Block / Synthetic Graphite Block / Isostatic Graphite Block / Fine Grain Graphite Block / High Purity Graphite Block / EDM Graphite Block |
| Appearance | Black to dark gray solid graphite block |
| Form | Block / Plate / Slab / Machined Block / Custom Graphite Part |
| Material Type | Molded Graphite / Extruded Graphite / Isostatic Graphite / Fine Grain Isotropic Graphite |
| Density | 1.70–1.90 g/cm³ depending on grade |
| Carbon Content | Up to ≥99.9% for selected high-purity grades |
| Ash Content | ≤0.30% for general grades / ≤0.05% for selected high-purity grades |
| Particle Size | 1–20 μm depending on grade and application direction |
| Electrical Resistivity | 10–20 μΩ·m depending on grade |
| Machinability | Good to excellent, especially in fine grain isotropic grades |
| Application Grade | EDM Grade / Metallurgical Grade / Furnace Grade / High Purity Grade / Custom Machining Grade |
| Processing Method | Sawing, milling, turning, drilling, CNC machining, and drawing-based processing |
| Supply Format | Raw Block / Cut Block / Semi-Finished Blank / Fully Machined Part |
Key Features
- Solid graphite material suitable for machining, shaping, and structural graphite applications
- Good high-temperature performance in suitable non-oxidizing or controlled atmospheres
- Good resistance to thermal shock under proper service conditions
- Good electrical conductivity and thermal conductivity depending on material grade
- Good chemical resistance in many industrial environments
- Available in molded, extruded, isostatic, and fine grain isotropic grades
- Suitable for EDM, furnace, mold, metallurgical, and selected high-purity applications
- Can be machined into customized graphite parts according to drawings or samples
Main Application Directions
- EDM graphite block for mold and die electrode production
- High purity graphite block for selected high-temperature and contamination-sensitive processing systems
- Fine grain graphite block for precision machining and detailed mold structures
- Synthetic graphite block for furnace fixtures, trays, hot-zone parts, and thermal process tooling
- Carbon graphite block for metallurgy, casting, and industrial graphite component manufacturing
- Custom machined graphite block for rings, plates, molds, boats, trays, fixtures, and engineered graphite parts
Why Choose Graphite Block for Industrial Use
Graphite Block is preferred in many industrial sectors because it offers a practical balance of machinability, thermal performance, chemical stability, electrical conductivity, and dimensional processing flexibility. Compared with graphite powder or flexible graphite materials, it is more suitable for applications requiring fixed geometry, load-bearing support, controlled machining, or customized component design.
Depending on the selected grade, Graphite Block can support a wide range of use directions, from cost-effective general industrial applications to high-purity and fine-grain graphite components. Buyers can choose different density, purity, grain size, resistivity, and block size combinations according to service conditions, contamination limits, dimensional tolerance, and expected machining detail.
Product Advantages
- Multiple graphite material routes for different price and performance requirements
- Available in general industrial, high purity, and fine grain isotropic grade directions
- Suitable for both standard block supply and drawing-based graphite machining
- Good balance of heat resistance, conductivity, machinability, and dimensional stability
- Suitable for sample testing, pilot production, and bulk industrial supply
- Supports inquiry matching by application, material grade, block size, and machining requirement
Customization Service
QDZRT Graphite can provide suitable Graphite Block specifications according to different application requirements, including material grade, density, purity, grain size, block size, machining allowance, and finished-part format. Sample support, pilot testing, drawing-based machining, and bulk order services are available for industrial users, OEM customers, and graphite component buyers.
Customized supply options may include raw block cutting, semi-finished blanks, CNC machining, drilled or slotted structures, precision plates, rings, trays, furnace fixtures, molds, and other engineered graphite parts. For customers searching for a graphite block supplier, synthetic graphite block source, EDM graphite block supplier, or high purity graphite block solution, QDZRT Graphite can support both standard and custom projects.
Packaging & Storage
Graphite Block is available in standard packaging and customized packaging options, including raw block packaging, semi-finished blank packaging, machined-part packaging, sample supply, and bulk industrial packaging. Packaging can be arranged according to block size, machining condition, surface protection requirement, and shipment method.
The material should be stored in a clean, dry, and well-protected environment to avoid contamination, impact damage, and unnecessary moisture exposure. Proper handling and storage help maintain dimensional integrity and surface quality during transportation, machining preparation, and long-term storage.
Inquiry Guidance
To help QDZRT Graphite recommend the right Graphite Block grade, buyers are encouraged to provide the application type, preferred material route, target density or purity level, approximate dimensions, machining allowance, and whether the final product will be used for EDM, furnace, metallurgy, high-temperature processing, or custom graphite components.
For drawing-based projects, it is also helpful to provide drawings, tolerance requirements, surface requirements, working temperature, atmosphere conditions, and expected order quantity. These details allow faster matching between standard graphite block supply and engineered graphite part production.
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