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High-purity graphite components for vacuum furnaces, inert-atmosphere furnaces, crystal growth systems, sintering equipment, thermal processing, and other demanding high-temperature applications.
MetalsTek supplies standard and custom graphite furnace parts manufactured according to drawings, dimensions, operating temperature, atmosphere, purity requirements, and equipment design.
MetalsTek supplies graphite furnace and hot-zone components for laboratory, research, and industrial high-temperature systems. Typical products include graphite heaters, insulation supports, heat shields, crucibles, trays, tubes, rings, sleeves, fixtures, electrodes, and custom machined furnace parts.
Graphite combines high-temperature capability, good thermal conductivity, low thermal expansion, machinability, and resistance to thermal shock. These properties make it suitable for furnace hot zones operating under vacuum, argon, nitrogen, reducing gas, and other controlled atmospheres.
Components can be produced from isostatic graphite, fine-grain graphite, high-purity graphite, extruded graphite, and other grades selected according to temperature, atmosphere, electrical resistance, mechanical load, purity, and service-life requirements.
Resistance heating elements, heater rods, plates, tubes, and electrode components.
Radiation shields, insulation retainers, support frames, and thermal barriers.
Trays, boats, holders, carriers, and loading fixtures for heat treatment and sintering.
Susceptors, heating platforms, thermal distribution parts, and process supports.
Spacers, support rings, sleeves, columns, brackets, and hot-zone structural parts.
Drawing-based multi-part assemblies for vacuum furnaces, crystal growth, sintering, and thermal systems.
The recommended grade depends on operating temperature, furnace atmosphere, purity requirement, electrical resistivity, thermal conductivity, strength, grain size, oxidation exposure, machining complexity, and cost target.For semiconductor, vacuum, crystal-growth, and contamination-sensitive systems, high-purity or purified isostatic graphite may be recommended.
Selecting the best carbon or graphite product depends on material type, product form, purity, density, grain size, working temperature, atmosphere, and machining requirements.
Graphite retains useful strength and dimensional stability at elevated temperatures in vacuum, inert gas, and suitable reducing atmospheres.
Graphite transfers heat efficiently and supports a more uniform thermal field in furnace hot-zone assemblies.
Low thermal expansion and good thermal conductivity help graphite withstand repeated heating and cooling cycles.
Easy to machine into complex shapes and tight tolerances.
High-purity options with ultra-low ash for critical uses.
Custom dimensions, tolerances, and finishes on request.
| Parameter | Typical Value / Range | Importance |
|---|---|---|
| Material | Isostatic Graphite / Fine-Grain Graphite | Ensures material uniformity and reliable high-temperature performance |
| Ash Content | ≤ 50 ppm (high-purity grade); ≤ 500 ppm (standard grade) | Lower ash content reduces contamination |
| Density | 1.65–1.90 g/cm³ | Influences mechanical strength and thermal properties |
| Maximum Operating Temperature | Up to 3000°C in inert gas or vacuum* | Determines the practical temperature capability |
| Compressive Strength | 35–120 MPa | Influences load-bearing capacity |
| Flexural Strength | 15–60 MPa | Indicates resistance to bending and mechanical stress |
| Thermal Conductivity | 85–180 W/m·K | Supports efficient and uniform heat distribution |
| Coefficient of Thermal Expansion | 3.5–5.0 × 10⁻⁶/°C | Lower expansion helps reduce thermal stress |
| Electrical Resistivity | 8–20 μΩ·m | Important for graphite heaters and electrodes |
| Purity | Standard / High Purity / Ultra-High Purity | Supports different furnace and contamination-control requirements |
| Material | Key Advantage | Typical Application |
|---|---|---|
| High-Purity Graphite | High thermal stability, low ash content, good thermal-shock resistance, electrical conductivity, and excellent machinability | Furnace hot zones, heaters, susceptors, heat shields, insulation supports, and structural components |
| Silicon Carbide (SiC) | Higher mechanical strength and better oxidation resistance in air | High-temperature structural parts and components used in oxidizing environments |
| Molybdenum Disilicide (MoSi₂) | Very high-temperature capability and improved oxidation resistance | Electric heating elements and selected high-temperature furnace components |
| Tungsten | Extremely high melting point, high density, and high-temperature strength | Electrodes, shields, furnace hardware, and specialized high-temperature components |
Common components include heaters, electrodes, heat shields, insulation supports, crucibles, trays, rods, tubes, rings, sleeves, fixtures, and custom structural parts.
Graphite can operate at very high temperatures in vacuum or inert atmospheres, but the practical limit depends on the grade, load, atmosphere, purity, and equipment design. Oxidizing conditions significantly reduce allowable temperature.
Yes. Components can be manufactured according to drawings, dimensions, samples, tolerances, furnace conditions, and equipment requirements.
Fine-grain isostatic graphite is commonly selected because of its uniform structure, machinability, and dimensional stability. High-purity grades may be required for contamination-sensitive processes.
Yes. Rod, tubular, plate, spiral, and custom-shaped graphite heaters can be reviewed based on voltage, current, resistance, power, operating temperature, and installation dimensions.
Prototype, small-batch, replacement-part, and production orders can be reviewed according to material availability and machining complexity.
Material certificates, dimensional inspection reports, purity information, and other documentation can be provided when specified before quotation.
