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MetalsTek supplies carbon and graphite materials, graphite crucibles, machined graphite components, and graphite furnace / hot-zone parts for vacuum, thin-film deposition, semiconductor, metallurgy, thermal processing, and laboratory applications.
We provide carbon evaporation materials, carbon sputtering targets, graphite crucibles, graphite boats, custom graphite parts, graphite molds, graphite dies, graphite heating elements, graphite susceptors, and high-purity graphite components according to customer requirements.
Carbon evaporation materials, sputtering targets, plates, sheets, rods, bars, tubes, blocks, discs, rings, and custom stock shapes for thin-film deposition, laboratory research, machining, and high-temperature applications.
Graphite crucibles, e-beam crucibles, boats, trays, dishes, setters, and sample holders for vacuum evaporation, thermal processing, melting, sintering, laboratory heating, and powder metallurgy applications.
Custom graphite molds, dies, punches, sleeves, fixtures, jigs, rings, bushings, nozzles, plates, and CNC-machined graphite components for powder metallurgy, hot pressing, sintering, EDM, and high-temperature tooling.
Graphite heaters, susceptors, insulation parts, shields, support rings, electrodes, crucibles, and hot-zone components for vacuum furnaces, crystal growth, photovoltaic manufacturing, silicon processing, and semiconductor thermal processing.
Need a custom graphite component? Send us your drawing, dimensions, material requirement, quantity, working temperature, atmosphere, and tolerance requirements. MetalsTek can review custom graphite parts for high-temperature, vacuum, semiconductor, metallurgy, and laboratory applications.
Real examples of drawing-based graphite machining, including custom crucibles, machined graphite plates, holes, grooves, and special dimensions.
Custom graphite crucibles machined according to customer drawings, dimensions, and working conditions.
Graphite parts can be produced with controlled tolerances, surface finish, holes, grooves, and special profiles.
Machined graphite plates and blocks with holes, slots, grooves, and custom features for industrial use.
MetalsTek supplies application-specific graphite parts for high-temperature, vacuum, semiconductor, photovoltaic, powder metallurgy, hard alloy, EDM, and laboratory heating processes. Parts can be manufactured according to drawings, samples, or specified working conditions, with material selection based on temperature, atmosphere, purity, density, and machining requirements.
Graphite heaters, insulation parts, support rings, crucibles, susceptors, guide tubes, shields, and structural hot-zone components for crystal growth, semiconductor processing, and high-temperature furnace systems.
Material options include high-purity graphite and fine-grain isostatic graphite for demanding thermal and vacuum environments.
Graphite side plates, bottom plates, heating elements, support blocks, insulation parts, trays, and furnace fixtures for photovoltaic and silicon ingot furnace applications.
Custom sizes, holes, slots, grooves, and assembly features can be machined according to furnace design.
Graphite molds, dies, punches, sleeves, and hot-pressing tooling for powder metallurgy, sintering, and high-temperature forming processes.
Material selection depends on pressing temperature, load, atmosphere, and required surface finish.
Graphite boats, trays, setters, plates, molds, and support parts for cemented carbide, hard alloy, tungsten carbide, and sintering applications.
Fine-grain graphite electrodes, blocks, plates, and custom machined electrode shapes for EDM machining, mold manufacturing, and precision cavity forming. Material selection can be matched to discharge performance, surface finish, and machining accuracy requirements.
Graphite heating blocks, sample holders, plates, and custom machined parts for laboratory heating, digestion, and sample preparation equipment. Compatibility should be reviewed based on temperature, atmosphere, and chemical exposure.
Compare common carbon and graphite grades by purity, density, grain size, strength, thermal behavior, and typical applications. Final material selection should be confirmed based on drawings, working temperature, atmosphere, and process conditions.
| Grade | Bulk Density (g/cm³) | Elec. Resistivity (μΩ·m) | Thermal Conductivity (W/m·K) | Thermal Expansion (600°C, ×10⁻⁶/K) | Shore Hardness (HSD) | Compressive Strength (MPa) | Flexural Strength (MPa) | Elastic Modulus (GPa) | Porosity (%) | Ash Content (ppm) | Particle Size (μm) | Recommended Applications |
| MT-4 | 1.75 | 8–11 | 110–120 | 5.46 | 42 | 65 | 38 | 9 | 17 | 50 | 13–15 | General |
| MT-5 | 1.85 | 8–10 | 130–140 | 4.75 | 48 | 85 | 46 | 10.8 | 11 | 50 | 13–15 | General |
| MT-6 | 1.90 | 8–9 | 130–140 | 4.80 | 53 | 90 | 55 | 12 | 10 | 50 | 8–10 | Metallurgy |
| MT-5* | 1.68 | 13–15 | 80–100 | 5.80 | 58 | 95 | 46 | 10 | 18 | 50 | 8–10 | EDM |
| MT-7 | 1.85 | 11–13 | 100–120 | 5.90 | 68 | 120 | 60 | 10 | 12 | 50 | 7 | EDM & Optics; Hot Bending (Car Back Cover) |
| MT-8 | 1.90 | 11–13 | 110–120 | 5.85 | 72 | 160 | 70 | 13 | 11 | 50 | 5 | EDM & Optics; Hot Bending (Car Front Cover) |
| MT-800 | 1.85 | 11–13 | 95 | 6.00 | 70 | 140 | 70 | 12 | 15 | 50 | — | Photovoltaic (PV) |
| MT-810 | 1.82 | 11–13 | 95 | 6.10 | 70 | 145 | 68 | 11 | 15 | 50 | — | Photovoltaic (PV) |
| MT-860 | 1.82 | 12–15 | 90 | 6.20 | 73 | 165 | 65 | 13 | 10 | 50 | — | Photovoltaic (PV) |
| MT-900 | 1.83 | 8–11 | 120 | 4.90 | 50 | 87 | 45 | 11 | 13 | 50 | — | Semiconductor |
| MT-910 | 1.75 | 8–11 | 130–140 | 4.30 | 45 | 70 | 45 | 11 | 13 | — | — | Semiconductor |
| MT-950 | 1.85 | 8–11 | 120 | 5.00 | 51 | 100 | 55 | 13 | 13 | — | — | Semiconductor |
| MT-960 | 1.79 | 8–11 | 100 | 5.30 | 55 | 101 | 60 | 12 | 14 | — | — | Semiconductor |
For custom graphite parts or critical high-temperature applications, please send your drawing, required grade, working environment, and quantity for review.
From material selection to precision machining, we support custom carbon and graphite components based on drawings, samples, and operating conditions.
Identify application, temperature, atmosphere, and performance requirements.
Select suitable graphite, carbon, or high-purity material based on operating conditions.
Review drawings, tolerances, surface finish, and special machining features.
Evaluate temperature, vacuum, inert gas, oxidation risk, and service conditions.
Send drawings or samples for fast technical review and quotation.
Choose the right carbon or graphite material based on purity, density, grain size, operating temperature, atmosphere, and machining requirements.
Compare carbon, graphite, high-purity graphite, and isostatic graphite based on purity, strength, and application requirements.
Choose plates, rods, tubes, blocks, crucibles, boats, trays, or machined graphite parts according to your application.
High-purity and controlled-density graphite are important for semiconductor, vacuum furnace, and high-temperature processes.
Fine-grain graphite offers better machinability, dimensional stability, and surface quality for precision components.
Evaluate vacuum, inert gas, oxidation risk, thermal shock, and working temperature before selecting graphite materials.
For custom parts, review drawings, tolerances, surface finish, holes, threads, and assembly requirements before production.
Selecting the best carbon or graphite product depends on material type, product form, purity, density, grain size, working temperature, atmosphere, and machining requirements.
For the most accurate quotation, please send us your drawing whenever possible, along with the key details below.
| Information | Details |
|---|---|
| Product Type | Plate, rod, tube, block, crucible, boat, tray, or custom machined part |
| Material Grade | Carbon, graphite, high-purity graphite, isostatic graphite, or specified grade |
| Dimensions / Drawing | OD, ID, length, width, thickness, and drawing dimensions. Tolerances, surface finish, holes, threads, grooves, or special machining details. Technical drawings are preferred. |
| Working Conditions | Temperature, vacuum, inert gas, oxidation risk, or chemical exposure |
| Quantity | Sample quantity, batch quantity, or annual usage |
Carbon and graphite materials are widely used in high-temperature, vacuum, semiconductor, solar, EDM, metallurgy, and industrial furnace applications. Although many products may look similar in shape, their performance depends strongly on material structure, purity, density, grain size, working atmosphere, and oxidation behavior. Understanding these factors helps engineers and buyers select suitable graphite crucibles, boats, trays, blocks, rods, plates, hot-zone components, and custom machined graphite parts.
Carbon is a broad material family, while graphite is a crystalline form of carbon with a layered structure. This structure gives graphite its excellent machinability, thermal stability, electrical conductivity, and lubricating behavior. In industrial use, graphite is commonly processed into blocks, rods, plates, crucibles, boats, trays, molds, electrodes, fixtures, and hot-zone components. However, not all graphite materials are the same. Molded graphite, extruded graphite, isostatic graphite, carbon-carbon composites, and high-purity graphite can differ significantly in structure, strength, porosity, purity, and performance. For demanding applications, the graphite grade should be selected based on both the product shape and the actual working conditions.
High-purity graphite is selected when contamination control is important. It is commonly used in semiconductor processing, photovoltaic manufacturing, crystal growth, vacuum furnaces, thin-film deposition, laboratory heating, and other clean high-temperature environments. Compared with general industrial graphite, high-purity graphite has lower ash content and reduced metallic impurities, which helps reduce contamination risk during heating, melting, evaporation, or contact with sensitive materials. When choosing high-purity graphite, users should consider the required purity level, ash content, impurity limits, contact materials, working atmosphere, and whether additional purification is needed. For critical processes, these requirements should be confirmed before production.
Isostatic graphite is a fine-grain graphite material produced with a uniform structure in multiple directions. It offers good machinability, dimensional stability, and relatively consistent performance compared with some conventional graphite grades. Because of its uniform structure and fine grain size, isostatic graphite is often used for precision machined graphite parts, semiconductor fixtures, EDM electrodes, continuous casting molds, furnace components, hot-zone parts, and high-temperature tooling. It is especially useful when the part has complex geometry, thin walls, small holes, grooves, threads, or tight machining details. For custom parts, the final material choice should consider drawing complexity, tolerance, surface finish, working temperature, and application environment.
Purity, density, and grain size are key material properties that affect graphite performance. Purity influences contamination risk, especially in semiconductor, vacuum, laboratory, and high-temperature applications. Density affects strength, porosity, permeability, and service life. Grain size affects machinability, surface finish, edge quality, wear behavior, and the ability to produce detailed features. Fine-grain graphite is often preferred for precision machining, while other grades may be suitable for larger structural parts or general furnace use. For custom graphite components, these properties should be reviewed together with the drawing, tolerance requirements, product size, working load, and operating environment.
Graphite can perform well at high temperatures, especially in vacuum, inert gas, and reducing atmospheres. However, its practical service temperature depends on the graphite grade, atmosphere, heating cycle, mechanical load, part geometry, and service time. A graphite part used in vacuum or argon may behave very differently from the same part used in air or oxygen-containing environments. For this reason, temperature alone is not enough for material selection. Users should provide the maximum temperature, continuous working temperature, atmosphere, heating and cooling cycle, contact materials, and whether the part will be used continuously or intermittently. These details help determine whether standard graphite, high-purity graphite, isostatic graphite, coating, or another material should be considered.
Graphite is generally not ideal for prolonged high-temperature exposure in air because it can oxidize in oxygen-containing environments. Oxidation may cause weight loss, surface recession, dimensional change, strength reduction, and shorter service life. The oxidation rate depends on temperature, oxygen concentration, graphite grade, surface area, airflow, and exposure time. This is why graphite components used in vacuum furnaces, inert gas furnaces, and controlled atmospheres often perform much better than graphite parts exposed directly to air at elevated temperatures. If the application involves air, oxygen, or frequent opening of the furnace, protective coating, controlled atmosphere, design allowance, shorter service intervals, or alternative materials may need to be considered.
Carbon is a broad material family, while graphite is a crystalline form of carbon with a layered structure. For industrial applications, this difference matters because graphite usually offers better machinability, thermal conductivity, electrical conductivity, and high-temperature stability.
MetalsTek supplies graphite crucibles, boats, trays, blocks, rods, plates, hot-zone components, and custom machined graphite parts. The right material should be selected based on purity, density, grain size, strength, porosity, working atmosphere, and application conditions.
High-purity graphite is used when contamination control is important in high-temperature or vacuum processes. Typical applications include semiconductor processing, photovoltaic manufacturing, crystal growth, vacuum furnaces, thin-film deposition, laboratory heating, and clean thermal processing.
Compared with general industrial graphite, high-purity graphite has lower ash content and reduced metallic impurities. For critical applications, customers should confirm the required purity level, ash content, impurity limits, contact materials, working temperature, and atmosphere before production.
Isostatic graphite is a fine-grain graphite material produced with uniform pressure, giving it relatively consistent properties in different directions. It is commonly selected for precision machining, dimensional stability, fine surface finish, and complex graphite components.
MetalsTek supplies isostatic graphite parts for EDM electrodes, semiconductor fixtures, continuous casting molds, furnace components, hot-zone parts, and high-temperature tooling. It is often preferred when parts require thin walls, small holes, grooves, threads, or tight machining details.
Graphite can work at high temperature in vacuum or inert atmospheres, but it will oxidize in air or oxygen-containing environments at elevated temperatures. For applications exposed to air, oxidation behavior must be reviewed carefully.
Dense graphite, high-purity graphite, or coated graphite may help slow oxidation under suitable conditions, but standard graphite should not be considered oxidation-proof. Working temperature, exposure time, airflow, coating type, graphite grade, and service environment should be confirmed before use.
The right graphite grade should be selected based on application, working temperature, atmosphere, purity requirement, mechanical load, density, grain size, and machining complexity. General graphite may be suitable for simple furnace or structural parts, while fine-grain, isostatic, or high-purity graphite is often preferred for precision or contamination-sensitive applications.
For custom graphite products, MetalsTek reviews drawings, tolerances, surface finish, holes, grooves, threads, wall thickness, and operating conditions before recommending a suitable grade. If the material grade is not specified, application details can help us provide a practical recommendation.
Yes. MetalsTek can manufacture custom graphite parts according to customer drawings, samples, or specified dimensions. Common custom products include graphite crucibles, boats, trays, molds, plates, rods, blocks, fixtures, heaters, susceptors, insulation parts, and furnace hot-zone components.
For production review, please provide the drawing, material grade if known, dimensions, tolerances, surface finish, quantity, working temperature, atmosphere, and application. For complex or critical parts, feasibility should be confirmed before quotation and production.
Machining tolerances for custom graphite parts depend on graphite grade, part size, geometry, wall thickness, holes, threads, grooves, and inspection requirements. Small precision graphite parts can usually be machined more accurately than large, thin-wall, fragile, or long graphite components.
For critical dimensions, tolerances should be clearly marked on the drawing. Features such as sharp corners, deep holes, narrow slots, thin walls, threads, and complex profiles may require special review before production.
For a graphite parts quotation, please provide a drawing or complete dimensions, material grade or purity requirement, quantity, tolerances, surface finish, working temperature, atmosphere, and application. If the graphite grade is not known, the actual working conditions can help us recommend a suitable option.
Useful details include OD, ID, length, width, thickness, holes, threads, grooves, chamfers, radii, coating requirement, cleaning requirement, and whether the part will be used in vacuum, inert gas, air, furnace, semiconductor, EDM, evaporation, metallurgy, or solar manufacturing processes.
Vacuum furnaces commonly use graphite heaters, insulation parts, support rings, shields, trays, fixtures, molds, and hot-zone components. Semiconductor applications may use high-purity graphite susceptors, carriers, fixtures, crucibles, plates, and precision machined graphite parts.
Material selection depends on purity, density, grain size, thermal stability, contamination control, working atmosphere, and dimensional requirements. For critical furnace or semiconductor use, customers should confirm grade, drawing, working temperature, atmosphere, and cleaning requirements before production.
