Industry-Trusted Isostatic Graphite
25+ Years of Expertise in Specialty Graphite & Carbon Solutions
Isostatic graphite, also known as isostatic carbon graphite or isotropic graphite, plays a key role in high-tech industries. Its fine-grain structure, high purity, and uniform strength make it ideal for applications like semiconductors, photovoltaics, EDM, and other industrial systems.
AtSHJ-CARBON, we lead the isostatic graphite market in China and supply customers in over 30 countries. With more than 25 years of experience, we understand what performance-driven industries need from graphite materials.
Isostatic graphite grades are not standardised across manufacturers. Even when datasheets look similar, service performance can differ significantly by application (thermal cycling, oxidation, purity sensitivity, wear mechanisms).
At SHJ-CARBON, we match grade selection to your part function, operating temperature & atmosphere, purity requirements— then recommend the closest-fit grade and supply form.
Reliable Isostatic Graphite: Precision, Speed & Value
48-Hour Expert Support – Free consulting & quick issue resolution
Cost-Efficient Production – Bulk scaling reduces costs, no quality loss
To recommend the right grade, please share:
- Industry & part name (e.g., heater, susceptor, crystalliser, electrode)
- Operating temperature range & atmosphere (vacuum / inert / oxidising)
- Purity requirement (ppm / ash limit), if applicable
- Drawing / dimensions / tolerances
- Current grade & issues (if replacing an existing material)
Specification of Isostatic Graphite
| Grade | Bulk Density |
Shore Hardness |
Ash Content |
Compressive Strength |
Flexural Strength |
Resistivity | Thermal Grain Conductivity Size |
Grain Size |
| ■IS-11 | 1.82g/cm³ | 63HSD | 50PPM | 115Mpa | 52Mpa | 10~15μQm | 120W/mk | 8~10μm |
| ■IS-15 | 1.90g/cm³ | 72HSD | 50PPM | 160Mpa | 70Mpa | 11~13μQm | 110~120W/mk | 5μm |
| ■IS-14 | 1.85g/cm³ | 68HSD | 50PPM | 120Mpa | 62Mpa | 11~13μΩm | 100~120W/mK | 7μm |
| ■IS-41 | 1.78g/cm³ | 76HSD | 100PPM | 122MPa | 69MPa | 15.7μQm | - | 10μm |
| ■IS-42 | 1.78g/cm³ | 65 HSD | 300PPM | 113Mpa | 57Mpa | 12.5μΩm | - | 13μm |
| ■ IS-51 | 1.81g/cm³ | 60HSD | 50PPM | 90Mpa | 45Mpa | 11~14μΩm | - | 12μm |
| ■IX-11 | 1.80g/cm³ | 85HSD | 200PPM | 180Mpa | 90Mpa | 25μQm | - | 4μm |
| ■IX-12 | 1.81g/cm³ | 92HSD | 200PPM | 190Mpa | 92Mpa | 25μΩm | - | 4μm |
| ■FM-12 | 1.75g/cm³ | 42HSD | 500PPM | 65Mpa | 38Mpa | 8~11μΩm | 110~120W/mk | 13μm |
| ■FM-13 | 1.85g/cm³ | 48HSD | 50PPM | 85Mpa | 46Mpa | 8~10μΩm | 130~140W/mk | 13μm |
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Versatile Applications of Isostatic Graphite Rods. Reliable in High-Temperature Furnace Systems.
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Isostatically Pressed Graphite
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Isostatic graphite is a versatile and valuable graphite material with fine-grain, excellent
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Isostatic Graphite For Copper Continuous Casting
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Controlled manufacturing for consistency and fast response
We control the full workflow in-house — from raw material screening to forming, heat treatment and machining.
Cold Isostatic Pressing (CIP) applies uniform pressure from all directions to form isotropic blocks with consistent density and minimal internal stress.
- Incoming raw material checks: purity-related and particle size controls
- Batch traceability: lot coding and records for repeat orders
- Typical QC: density and electrical checks with sampling inspections
- Packaging options: anti-chipping export packaging; clean packaging for sensitive applications (upon request)
Application-focused solutions (materials + machining)
successful cases
we engineer isostatic graphite solutions for industries where performance and reliability matter most.
Vacuum Furnaces
Typical parts: heating elements, fasteners, shields, supports, hot zone panels
Key requirements: thermal shock resistance, dimensional stability, low CTE, oxidation control
Supply: blocks/plates + CNC machining to drawings
CZ Crystal Growth
Typical parts: susceptors, fixtures, heaters, boats (process dependent)
Key requirements: high purity, low contamination risk, batch consistency
Supply: high-purity options + clean packaging + machining
Mono-crystal Furnaces
Typical parts: furnace components facing repeated thermal cycling
Key requirements: crack resistance under thermal cycling, stable performance
Copper Continuous Casting
Typical parts: crystallisers, dies, guides
Key requirements: thermal shock + wear/erosion control + consistency
Why Choose SHJ-CARBON's Isostatic Graphite?
CIP-made isotropic structure
We use CIP technology to produce isostatically formed carbon graphite with ultra-high density and minimal porosity. This ensures consistent performance under extreme conditions.
Material + machining, one-stop delivery
Our graphite starts with ultra-fine graphitized coke grains, rigorously tested for purity and uniformity. The result? High-purity isostatic graphite with unmatched structural integrity.
Application-driven grade recommendation
We don't just sell graphite-we solve problems. Our team works with you to recommend the right custom isostatic graphite block for your specific application, such as:
Reliable supply for repeat orders
As a leading isostatic graphite manufacturer in China, we serve clients worldwide with fast turnaround and scalable production.
Frequently Asked Questions Of Isostatic carbon graphite
1. What is isostatic graphite and when should it be used?
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Isostatic graphite is a fine-grain, isotropic graphite material produced by cold isostatic pressing, where pressure is applied uniformly in all directions.
It is typically used in applications requiring uniform strength, stable thermal performance, and consistent properties, such as semiconductors, vacuum furnaces, continuous casting, and EDM. If you want to know more please click to our blog"What is Isostatic Graphite?"
2. What are the key properties of isostatic graphite?
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The key properties of isostatic graphite include density, grain size, purity (ash content), thermal conductivity, electrical resistivity, and mechanical strength.
Because it is isotropic, these properties remain consistent in all directions, unlike extruded graphite, which shows directional differences.
3. Why is density important in isostatic graphite?
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Density directly affects the strength, thermal shock resistance, oxidation behaviour, and service life of isostatic graphite.
While higher density generally improves durability and wear resistance, the optimal density depends on the specific application and operating conditions, not on density alone.
4. How is isostatic graphite produced?
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Isostatic graphite is produced using cold isostatic pressing (CIP), where fine graphite powder is compressed uniformly by liquid pressure, followed by carbonisation and high-temperature graphitisation.
This process creates a homogeneous internal structure with minimal directional weakness.
5. What information do you need to recommend the right isostatic graphite grade?
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To recommend the correct isostatic graphite grade, we need information about the application, operating temperature and atmosphere, purity requirements, part dimensions, and machining tolerances.
For replacement projects, details of the current material and its performance issues are also important.
6. How do you ensure batch-to-batch consistency?
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Batch-to-batch consistency is ensured through controlled raw material selection, standardised isostatic pressing conditions, and routine quality checks.
Key parameters such as density and electrical properties are monitored, and batch traceability is maintained to support long-term repeat supply.
7. Can you provide COA or inspection reports?
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Yes, Certificates of Analysis (COA) and inspection reports can be provided upon request.
These documents typically include key physical and chemical properties relevant to your application and support quality audits and supplier qualification.
8. How is isostatic graphite packaged for export or clean applications?
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Isostatic graphite is packaged according to application requirements.
For standard industrial use, packaging protects against chipping and transport damage, while clean handling and dedicated packaging options are available for sensitive applications such as semiconductors.
9. What is the difference between isostatic graphite blocks and rods?
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Isostatic graphite blocks are commonly used as raw material for machining large or complex parts, whereas rods are preferred for electrodes, shafts, and rotational components.
The choice depends on part geometry, machining efficiency, and material utilisation, not on material quality.
10. Why does isostatic graphite price vary so much?
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Isostatic graphite price varies based on density, grain size, purity level, maximum dimensions, machining requirements, and quality control standards.
Comparing prices by weight alone is misleading; total cost should be evaluated based on performance stability, service life, and replacement risk.
Related articles
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Isostatic graphite is a high-purity material produced using isostatic pressing technology, which ensures uniform density and superior mechanical properties. It is known for its excellent thermal stability, electrical conductivity, and minimal impurities, making it ideal for precision applications in industries like aerospace, electronics, and energy.
Isostatic Graphite Vs Extruded Graphite
Isostatic graphite and extruded graphite differ primarily in their manufacturing processes. Isostatic graphite is formed under high-pressure conditions, ensuring uniform density and purity, whereas extruded graphite is shaped by forcing material through a mold. This results in isostatic graphite having superior consistency, strength, and thermal performance compared to extruded graphite, making it more suitable for demanding applications.
How to Check Isostatic Graphite Quality？
To assess the quality of isostatic graphite, key factors such as purity, density, and structural uniformity must be considered. Look for materials that have been produced using isostatic pressing technology, as this ensures even distribution of particles. Additionally, high-quality isostatic graphite should have minimal impurities and excellent thermal and electrical conductivity for optimal performance in high-precision applications.
We're well-known as one of the leading fine isostatic graphite manufacturers and suppliers in China. If you're going to buy high quality fine isostatic graphite for sale, welcome to get free ample from our factory. For price consultation, contact us.
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