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Molded Graphite
High-Density, Fine-Grain Graphite Blocks, Rods, Plates and Custom Machined Components for Industrial Applications
Molded graphite is a high-density synthetic graphite material manufactured through a compression molding process. It is produced in blocks, rods, plates and custom shapes for applications that require fine grain structure, high purity, mechanical strength, low electrical resistivity and excellent machinability.
GraphiteCentral supplies molded graphite materials for semiconductor manufacturing, vacuum furnaces, continuous casting, EDM electrodes, sealing products, aerospace, medical, metallurgical and high-temperature industrial applications. Standard grades are available, and custom properties, dimensions, purification levels and machined parts can be produced according to customer drawings and technical requirements.
Why Choose Molded Graphite?
High Density Structure
Provides excellent dimensional stability, durability and reliable performance in demanding industrial environments.
Fine Grain Size
Supports precise machining, smooth surface finishes and complex component geometries.
High Purity Options
Standard grades are available with 500-1000 PPM ash content and can be purified to as low as 20 PPM.
Low Electrical Resistivity
Suitable for EDM electrodes, electronic components and applications requiring strong electrical performance.
Thermal Shock Resistance
Performs reliably under rapid heating and cooling cycles in high-temperature processes.
Anticorrosion Performance
Good resistance to corrosive environments, with optional SiC coating, pitch impregnation or protective treatments.
Molded Graphite Products
What Is Molded Graphite?
Molded graphite is produced by pressing prepared carbon raw materials into a mold, followed by baking and graphitization at high temperature. The compression molding process creates a graphite material with a dense structure, fine grain size and dependable physical properties.
Because of its balance of strength, machinability, purity and cost efficiency, molded graphite is commonly selected for applications where high-performance graphite is required but isostatic graphite may not be necessary.
Molded Graphite Specifications
| Property | M1 | M2 |
|---|---|---|
| Bulk Density MIN (g/cm³) | 1.78 | 1.85 |
| Ash Content (PPM) | 500-1000 | 500-1000 |
| Shore Hardness | 40 | 45 |
| Electrical Resistivity (μΩ·m) | ≤12 | ≤12 |
| Flexural Strength (MPa) | 30-35 | 35-45 |
| Compressive Strength (MPa) | 50-55 | 60-82 |
| Maximum Grain Size (μm) | 43 μm | 43 μm |
| Coefficient of Thermal Expansion, 100-600°C | 4.5 × 10⁻⁶ | 4.5 × 10⁻⁶ |
Purification & Custom Properties
Ash content of all molded graphite grades can be purified to 20 PPM. Special property requirements can be manufactured according to customer application needs.
Available Sizes
Graphite Rods
| Specification | Diameter | Length |
|---|---|---|
| Size Range | 0-1300 mm | 0-2000 mm |
| Standard Size | 110-500 mm | 180-400 mm |
Graphite Blocks
| Specification | Length | Width | Thickness |
|---|---|---|---|
| Size Range | 0-900 mm | 0-400 mm | 0-320 mm |
| Standard Size | 200-900 mm | 125-400 mm | 53-320 mm |
Custom Sizes Available
Larger sizes can be specially pressed. Smaller sizes can be further machined. Molded graphite parts can be manufactured according to customer drawings, required tolerances and application requirements.
Common Applications
Semiconductor & Vacuum Furnace
- Monocrystalline silicon production
- Vacuum furnace components
- Heaters and heat shields
- High-temperature fixtures
Metallurgy & EDM
- Continuous casting
- Forging molds
- EDM electrodes
- Melting and sintering molds
Industrial & Advanced Materials
- Sealing products
- Electronic tube anodes
- Cemented carbide and diamond tools
- Aluminum, copper and specialty metals
Molded Graphite vs. Other Graphite Materials
| Material | Uniformity | Density | Machinability | Relative Cost |
|---|---|---|---|---|
| Molded Graphite | Good | High | Excellent | Medium |
| Isostatic Graphite | Outstanding | Very High | Excellent | High |
| Vibration Molded Graphite | Excellent | High | Excellent | Medium |
| Extruded Graphite | Moderate | Medium | Excellent | Lower |
Custom Graphite Machining
GraphiteCentral supplies both raw molded graphite stock and fully machined graphite components manufactured to customer drawings.
- CNC milling
- Turning
- Drilling
- Threading
- Grooving
- Surface finishing
- Prototype and production quantities
Additional Processing Options
Purification • Pitch Impregnation • SiC Coating • Anticorrosion Cover • Custom Machining • Special Property Manufacturing
Frequently Asked Questions
What is molded graphite?
Molded graphite is a synthetic graphite material made by compression molding carbon raw materials before baking and graphitization. It offers high density, fine grain structure, good strength and excellent machinability.
What are the advantages of molded graphite?
Molded graphite provides high density, high strength, low electrical resistivity, thermal shock resistance, good corrosion resistance and ease of precision machining.
Can molded graphite be machined?
Yes. Molded graphite is widely used for precision CNC machining and can be manufactured into custom components according to customer drawings and specifications.
What sizes are available?
Molded graphite rods are available up to 1300 mm in diameter and 2000 mm in length. Molded graphite blocks are available up to 900 mm in length, 400 mm in width and 320 mm in thickness. Larger sizes can be specially pressed on request.
Can ash content be reduced?
Yes. Ash content of all molded graphite grades can be purified to 20 PPM for applications requiring higher purity.
Looking for Molded Graphite?
GraphiteCentral supplies molded graphite blocks, rods, plates and custom machined graphite components for industrial applications worldwide.