Tokai Carbon — Isotropic Graphite, Furnace Components and Graphite Electrodes
Global supply of high-purity isotropic graphite, furnace components, UHP graphite electrodes, and EREMA heating elements by Tokai Carbon (Japan / Tokai Carbon Co., Ltd.). High-temperature heaters, arc electrodes, and C/C composite fixtures from SpareX.
Tokai Carbon Isotropic Graphite for Industrial Furnace Components
Tokai Carbon G-series isotropic graphite is produced using cold isostatic pressing CIP technology. Grades G330, G347, and G520 feature uniform strength and conductivity in all orientations. They serve as reliable heating elements, thermal shields, and structural hearth blocks up to 2000 °C.
- Fine-grain isotropic grades G330, G347, G458, G520, and high-strength G535, G540
- Bulk density of 1.79 to 1.86 Mg/m3 with flexural strength ratings up to 88 MPa
- High thermal shock resistance and stable inert atmosphere duty up to 2000 °C
- Tubular and serpentine heating elements, thermal shields, and hearth floor plates
Tokai Carbon Graphite Electrodes and Connecting Pins for EAF
Tokai Carbon manufactures large-scale graphite electrodes for AC and DC electric arc furnaces. The portfolio includes ultra-high power UHP electrodes with diameters up to 32 inches. They are equipped with tapered threaded connecting pins ensuring joint integrity under extreme mechanical stress.
- High Power HP and Ultra-High Power UHP electric arc furnace graphite electrodes
- Standard and large diameters from 300 to 800 mm (up to 32 inches) for AC and DC furnaces
- Exceptional resistance to arc thermal shock and mechanical vibration at 1600 °C
- Tapered connecting pins with 3-TPI and 4-TPI thread pitch and electrode holders
Tokai Carbon HK Series Graphite for Sinker EDM Electrodes
Fine-grain Tokai Carbon HK series graphite is engineered for precision sinker EDM mold manufacturing. Grades HK-1, HK-2, and HK-3 feature ultra-fine grain microstructures down to 2 microns. The material minimizes electrode corner wear while delivering smooth surface finishes on complex cavity dies.
- EDM graphite grades HK-0, HK-1, HK-15, HK-2, HK-75, HK-3, and ultra-fine HK-6
- Micro-grain structure from 2 to 11 microns with Shore hardness from 56 to 78 HS
- Minimal electrode corner wear during rough cavity sinking and precision finishing
- Custom contoured electrodes for injection molds, stamping dies, and ground blocks
Tokai Carbon High-Purity Graphite and CVD SiC for Semiconductors
High-purity Tokai Carbon graphite components serve silicon crystal pullers and epitaxial systems. Assemblies feature ash levels below 5 ppm and CVD SiC coatings resistant to corrosive gases up to 1600 °C. The range includes CZ susceptors, thermal shields, and wafer carrier discs.
- Ultra-pure isotropic graphite with residual ash content below 5 ppm
- Gas-impermeable Glassy Carbon and dense pinhole-free CVD SiC protective coatings
- Corrosion resistance against molten silicon and reactive process gases up to 1600 °C
- CZ crystal puller susceptors, thermal radiation shields, MOCVD carrier plates, and liners
EREMA Silicon Carbide Electric Heating Elements by Tokai Carbon
EREMA silicon carbide heating elements are manufactured by the Tokai Carbon group. Heating rods ED, DB, and U operate reliably in air and furnace atmospheres up to 1600 °C. They deliver uniform heat generation for sintering ceramics, specialty glass, and annealing powdered metallurgy components.
- EREMA silicon carbide electric heating elements including types ED, DB, U, W, and SG
- Continuous operating temperature in air and inert atmospheres up to 1600 °C
- High surface heat dissipation rating 5 to 10 times higher than nichrome wire
- EREMA heating elements, thermocouple protection tubes, and flexible connection straps
Tokai Carbon C/C Composite Fixtures and High-Temperature Hardware
Tokai Carbon C/C composite parts are reinforced with multidirectional carbon fibers. The structure provides triple the fracture toughness of graphite under thermal cycles up to 2000 °C. It serves for lightweight furnace charging grids, heat-treating baskets, and threaded fasteners.
- High-strength carbon-carbon C/C composites featuring multidirectional fiber reinforcement
- Exceptional fracture toughness and inert atmosphere thermal stability up to 2000 °C
- Significant fixture weight reduction accelerating heating and cooling thermal cycles
- Furnace charging grids, heat-treating baskets, C/C threaded studs, and hex nuts
Tokai Carbon Isotropic Graphite and Electrode Technology
Japanese corporation Tokai Carbon Co., Ltd. is a global pioneer in cold isostatic pressing CIP graphite engineering and large-scale electric arc furnace electrodes. The material provides a micro-particle structure with uniform mechanical and thermal properties across all dimensions.
The technology supports demanding high-temperature vacuum furnaces, scrap melting arc furnaces, semiconductor crystal pullers, and precision EDM spark machining.
The engineering lineup features G-series isotropic graphite grades G330, G347, and G520, UHP graphite electrodes up to 32 inches with connecting pins, carbon-carbon C/C composites, ultra-pure semiconductor CZ hot-zone assemblies with ash levels below 5 ppm, fine-grain HK series EDM graphite, and EREMA silicon carbide electric heating elements.
Engineering Sizing and Material Selection for High-Temperature Duty
Selecting Tokai Carbon materials requires analyzing operating furnace atmosphere, vacuum level, peak thermal exposure, and mechanical load cycles.
Utilizing thin-profile C/C composite trays and efficient EREMA heating elements reduces thermal inertia and accelerates furnace turnaround times while maintaining dimensional stability.
SpareX engineering teams assist with thermal zone audits, custom component blueprint verifications, and dependable global delivery of verified Tokai Carbon graphite elements, arc electrodes, and hardware.
Tokai Carbon and model names are trademarks of their respective owners and are used only to identify the equipment for which we source parts. SpareX is not an official dealer, distributor or representative of Tokai Carbon and is not affiliated with the trademark owner. Origin, documents and warranty are stated for each item in the quotation.
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Documents and sources
- Official Tokai Carbon website — specialty graphite, electrodes and carbon materials
- Tokai Carbon Co., Ltd. corporate profile and global network — facilities
- Tokai Carbon Integrated Report 2025 — global manufacturing capacities and technologies
- Tokai Carbon Fine Carbon catalog — isostatic pressing and isotropic graphite
- Tokai Carbon graphite electrodes for electric arc furnaces — catalog
- Tokai Carbon smelting and lining carbon solutions — Tokai COBEX
- Industrial furnaces and EREMA heating elements — Tokai Carbon catalog
- Tokai Carbon USA — graphite electrodes and specialty graphite solutions
- Tokai Carbon specialty graphite portal — material specifications and properties
- Tokai Carbon products and divisions catalog — manufacturing portfolio
