
Graphite Block with ISO Approval (high density 1.82-1.90)
We supply high quality isostatic graphite blocks and rounds in high purity, high strength and high bulk density.
Description
Over the years, we have accumulated rich industry experience and solutions, and have developed into a comprehensive enterprise integrating R&D, production and sales of graphite Components for Glass, graphite round bar, vibration molded graphite block. The company adheres to the service tenet of "sincerity-based, reputation first", and will continue to provide you with high-quality products and perfect services. We sincerely welcome customers at home and abroad to negotiate business with our company and develop fruitful cooperation. We pay attention to details, user experience and science, and focus more on the research and development of product specialization. Together with our efforts, our products have won the trust of customers and been very salable both here and abroad. We regard corporate transparency as a sign to measure the efficiency of corporate governance, and we have made various efforts to improve the transparency of our company.
High-Performance Isostatic Graphite for Heating Elements
At SHJ CARBON, with over 25 years of expertise, we are a trusted Isostatic Graphite Manufacturer specializing in high-performance graphite products. We understand that industries require precise, durable, and high-temperature resistant graphite components to optimize production processes. Whether you're looking to replace your graphite hot zone, enhance furnace performance, or source high-quality graphite elements, we deliver customized solutions engineered to meet the highest industry standards, ensuring maximum performance in even the most demanding conditions.

SHJ Isostatic Graphite Specifications
| 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 | 11~13μΩm | 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 | 15.7μΩm | - | 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 |
| ■FM-22 | 1.80g/cm³ | 50HSD | 1000PPM | 75Mpa | 38Mpa | 12μΩm | - | 13μm |
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Applications in High Temperature & Vacuum Furnace Systems

The vacuum and sintering furnace is where SHJ CARBON's isostatic graphite truly proves its value.
Inside these demanding environments, our graphite heaters and connectors serve as the core heating structure - delivering stable temperature distribution, precise electrical performance, and long service life even under continuous high-temperature operation.
Each heater is carefully engineered and machined to maintain dimensional stability and purity, ensuring reliable operation throughout repeated heating cycles.
Beyond vacuum systems, SHJ CARBON's isostatic graphite materials are also trusted in crystal growth and diffusion equipment, CVD and PVD coating systems, semiconductor heat-treatment lines, and industrial test furnaces.
In every application, the same principle applies: consistent performance, controlled thermal expansion, and reduced downtime.

Integrated Solution - From Graphite Material to Heater Assembly
SHJ CARBON provides one-stop graphite solutions, covering every stage from material selection to final product integration.
|
Customer Requirement |
SHJ CARBON Solution |
|
Need for high-temperature stability |
Tailored isostatic graphite grades (1.83–1.95 g/cm³) |
|
Custom heater geometry or connector design |
Precision CNC machining & 3D simulation |
|
Quality consistency & lifespan testing |
Batch control, FEM design validation |
|
International supply & documentation |
ISO 9001 certified system + export technical files |
We don't just supply graphite - we deliver engineered reliability for your furnace systems.
Reliable Isostatic Graphite Solutions for Every Industry Need
With over 25 years of experience in graphite and carbon materials, SHJ CARBON has earned a reputation as a reliable partner for industries like vacuum furnace manufacturing, semiconductor equipment, and precision heat treatment. We stand out for our stable supply and machining capabilities, which are backed by a dedication to continuous improvement in both process and technology.
As China's isostatic graphite industry evolves, SHJ CARBON stays ahead by adopting the latest production technologies and tighter quality controls. We focus on delivering products that meet international standards, ensuring superior performance and consistency. Our approach has always been about more than just materials-it's about providing our customers with innovative solutions that improve furnace performance, safety, and efficiency, all while staying aligned with industry advancements.

Precision Materials.
Reliable Performance. Proven in Heat.
Full traceability and controlled material consistency
Proven export performance across 30+ countries
Ongoing R&D investment in graphite densification&machining
Engineering support from prototype to long-term batch supply
Frequently Asked Questions
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1. What is an isostatic graphite heater used for?
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It's used as a heating element inside vacuum or high-temperature furnaces, providing uniform thermal output and stable resistance in extreme environments.
2. Why is isostatic graphite preferred for vacuum furnaces?
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Because of its uniform structure, high purity, and isotropic strength, it delivers longer lifespan and greater stability than molded or extruded graphite under high thermal stress.
3. How long does an isostatic graphite heater last?
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Typically 1.5–3 years, depending on operating temperature, cycle frequency, and cooling method. Proper installation and current control extend its service life significantly.
4. Can isostatic graphite components be customized for my furnace?
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Yes. SHJ CARBON provides CNC-machined components tailored to your furnace size, design, and required electrical specifications.
5. What is the difference between isostatic graphite and molded graphite?
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Isostatic graphite has uniform properties in all directions due to equal-pressure pressing, offering better mechanical strength, precision, and reliability - especially in demanding high-temperature environments.
Get Your Custom Isostatic Graphite Solution
Whether you're upgrading an existing furnace or building a new system, our engineers can recommend the most suitable graphite grade, geometry, and connection design.
Send us your drawings, furnace type, or temperature range - we'll provide a tailored quotation and technical proposal within 24 hours.
To provide more high-quality Graphite Block with ISO Approval (high density 1.82-1.90) and perfect service is our tenet. We take honesty and trustworthiness as our basic business principle. Our guiding ideology is to consolidate achievements, strive for breakthroughs, and strive for excellence. Our company keeps pace with the times.
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