Premium Synthetic Graphite
Isostatic Graphite
High-Purity, Fine-Grain Graphite Blocks, Rods and Custom Machined Components for Semiconductor, EDM, Vacuum Furnace and High-Temperature Applications
Isostatic graphite is a premium synthetic graphite material manufactured through cold isostatic pressing technology. This process applies pressure uniformly from all directions, creating an isotropic graphite structure with high density, fine grain size, high purity, high mechanical strength, low specific resistance and excellent precision machining performance.
GraphiteCentral supplies isostatic graphite rods, blocks, plates and machined graphite components for semiconductor manufacturing, monocrystalline silicon production, vacuum furnaces, continuous casting, sealing products, aerospace, medical, EDM, graphite molds, heaters, heat shields, melting and sintering molds, cemented carbide, diamond tools and other high-temperature industrial applications.
Why Choose Isostatic Graphite?
Cold Isostatic Pressed
Produced using uniform pressure from all directions for excellent isotropic properties and material consistency.
Large Size Available
Available as rods, blocks, plates and custom machined parts with special sizes produced upon request.
High Density Structure
Provides excellent strength, wear resistance, dimensional stability and long service life in demanding applications.
Fine Grain Size
Fine and ultra-fine grain grades support precision machining, low electrode wear and stable surface quality.
High Purity Options
Grades are available with low ash content, and all grades can be purified to 20 PPM for high-purity applications.
Low Specific Resistance
Suitable for EDM electrodes, electrical discharge machining and applications requiring stable electrical performance.
High Strength
Strong mechanical properties support critical components used in EDM, furnace, casting and aerospace applications.
Thermal Shock Resistance
Performs reliably under rapid heating and cooling cycles, oxidation exposure and corrosive operating conditions.
Good Anticorrosion Performance
Optional SiC coating, pitch impregnation and protective treatments are available for demanding chemical environments.
Isostatic Graphite Products
What Is Isostatic Graphite?
Isostatic graphite is produced by pressing fine carbon raw materials using cold isostatic pressing technology. Unlike unidirectional or bidirectional pressing, isostatic pressing applies pressure evenly around the material, creating a highly uniform graphite structure with isotropic properties.
The result is a premium graphite grade with high density, low porosity, fine grain size, excellent strength, high purity and superior dimensional stability. These properties make isostatic graphite one of the preferred materials for semiconductor, EDM, aerospace, vacuum furnace and high-performance industrial applications.
Why Isostatic Graphite Is a Premium Graphite Grade
Isostatic graphite offers better isotropy, density, grain consistency and performance stability than many conventional molded or extruded graphite grades. It is selected when dimensional accuracy, fine surface finish, low porosity, high strength and long service life are critical.
Isostatic Graphite Specifications
| Property | BFS-1 | BFS-2 | BFS-3 | BFS-4 | BFS-5 |
|---|---|---|---|---|---|
| Bulk Density MIN (g/cm³) | 1.91 | 1.85 | 1.80 | 1.75 | 1.86 |
| Ash Content (PPM) | 50 | 500-1000 | 500-1000 | 500-1000 | 500 MAX |
| Grain Size (μm) | 8-10 | 25 | 25 | 25 | 4-6 |
| Specific Resistance (μΩ·m) | 10-12 | 11-13 | 11-13 | 15 MAX | 14 MAX |
| Compressive Strength MIN (MPa) | 138 | 80 | 75 | 55 | 120 |
| Flexural Strength MIN (MPa) | 60 | 40 | 37 | 25 | 55 |
| Shore Hardness MIN | 60 | 55 | 50 | 50 | 72 |
| Coefficient of Thermal Expansion | 5.0 | 4.5 | 4.4 | 4.0 | 4.0 |
| Young Modulus (GPa) | 12 | 11.5 | 10 | 10.5 | 12 |
Purification & Custom Properties
Ash content of all isostatic 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 | 0-630 mm | 0-1500 mm |
| Standard Size | 100 / 200 / 300 / 400 / 500 mm | 300 / 400 / 500 / 600 mm |
Graphite Blocks
| Specification | Length | Width | Thickness |
|---|---|---|---|
| Size Range | 0-1500 mm | 0-600 mm | 0-400 mm |
| Standard Size | 400 / 500 / 600 / 1000 mm | 400 / 500 mm | 200 / 300 / 400 / 500 / 600 mm |
Custom Sizes Available
Larger sizes can be specially pressed. Smaller sizes can be further machined. Isostatic graphite parts can be manufactured according to customer drawings, required tolerances and application requirements.
Common Applications
Semiconductor & Silicon
- Monocrystalline silicon production
- Semiconductor furnace components
- High-purity graphite fixtures
- Wafer processing components
EDM & Precision Machining
- EDM electrodes
- Fine finishing electrodes
- Graphite tooling
- Precision machined components
Vacuum Furnace & Metallurgy
- Heaters and heat shields
- Continuous casting components
- Graphite molds
- Melting and sintering molds
Aerospace, Medical & Sealing
- Aerospace thermal components
- Medical industry components
- Sealing products
- Corrosion-resistant graphite parts
Advanced Materials
- Cemented carbide production
- Diamond tool manufacturing
- Precious metal processing
- Electronic products and ceramic applications
Industrial Manufacturing
- Mechanical graphite parts
- Custom graphite molds
- High-temperature fixtures
- Special property graphite components
Isostatic Graphite vs. Other Graphite Materials
| Material | Uniformity | Density | Grain Structure | Relative Cost |
|---|---|---|---|---|
| Isostatic Graphite | Outstanding | Very High | Fine to Ultra-Fine | High |
| Vibration Molded Graphite | Excellent | High | Fine to Medium | Medium |
| Molded Graphite | Good | High | Fine to Medium | Medium |
| Extruded Graphite | Good | Medium | Directional | Lower |
Custom Graphite Machining
GraphiteCentral supplies both raw isostatic graphite stock and fully machined graphite components manufactured to customer drawings.
- CNC milling
- Turning
- Drilling
- Threading
- Surface finishing
- Precision EDM components
- Prototype and production quantities
Additional Processing Options
Purification • Pitch Impregnation • SiC Coating • Anticorrosion Cover • Custom Machining • Special Property Manufacturing
Frequently Asked Questions
What is isostatic graphite?
Isostatic graphite is a premium synthetic graphite produced using cold isostatic pressing, which applies pressure uniformly from all directions to create dense, uniform and isotropic graphite material.
What are the advantages of isostatic graphite?
Its advantages include high density, fine grain size, high purity, high strength, low specific resistance, excellent thermal shock resistance, corrosion resistance and ease of precision machining.
What is cold isostatic pressing?
Cold isostatic pressing is a forming process that applies equal pressure to carbon material from all directions, producing a uniform graphite structure with isotropic properties.
Can isostatic graphite be machined?
Yes. Isostatic graphite is widely used for precision CNC machining and can be manufactured into electrodes, molds, furnace parts, sealing components and custom graphite parts according to customer drawings.
Can ash content be reduced?
Yes. Ash content of all isostatic graphite grades can be purified to 20 PPM for applications requiring higher purity.
What sizes are available?
Isostatic graphite rods are available up to 630 mm in diameter and 1500 mm in length. Blocks are available up to 1500 mm in length, 600 mm in width and 400 mm in thickness. Larger custom sizes can be specially pressed upon request.
Looking for Isostatic Graphite?
GraphiteCentral supplies high-purity isostatic graphite rods, blocks, plates and custom machined graphite components for industrial applications worldwide.