TB-GR-CRGraphite Crucibles
Precision CNC-turned fine-grain isostatic graphite crucibles with low ash content (<20–500 ppm) for non-ferrous, precious metal, alloy, and crystal-growth melting.
Fine-grain isostatic graphite crucibles, custom CNC-machined furnace fixtures and susceptors, casting/sintering molds, rigid and soft carbon insulation felt, pyrolytic graphite, and gas-impermeable vitreous carbon labware.

Compare SKU codes, chemical formulas, CAS numbers, purity grades, and standard dimensional envelopes.
| SKU | Product Line | Formula | CAS # | Purity / Grade | Typical Dimensions | RFQ |
|---|---|---|---|---|---|---|
| TB-GR-CR | Graphite Crucibles | C | 7782-42-5 | 99.9% (Ash <500 ppm) to 99.995% Purified (<20–50 ppm Ash) | 5 mL lab cups to 50 kg induction melting crucibles | Quote ↗ |
| TB-GR-CNC | Custom Graphite Components | C | 7782-42-5 | Isostatic Grades (1.80–1.92 g/cm³); Purified <5–50 ppm Ash; SiC-Coated | 5-axis CNC machined from Ø 5 mm pins up to 800 mm furnace rings | Quote ↗ |
| TB-GR-PL | Graphite Plates & Blocks | C | 7782-42-5 | Molded Fine-Grain & Isostatic High-Density (99.9%–99.99% C) | Plates 1–100 mm thick; Blocks & Rods cut and surface-ground to size | Quote ↗ |
| TB-GR-MLD | Graphite Ingot Casting & Hot-Press Sintering Molds | C | 7782-42-5 | High-Strength High-Density Isostatic Graphite (1.85–1.92 g/cm³) | Ingot molds, continuous-casting dies, & SPS / Hot-Press die-punch sets | Quote ↗ |
| TB-GR-FLT | Rigid & Soft Graphite Vacuum Furnace Insulation Felt | C | 7782-42-5 | ≥99.0%–99.9% Graphitized PAN / Rayon Carbon (<100–500 ppm Ash) | Soft rolls/mats 3–20 mm thick; Rigid boards/cylinders 10–100 mm thick | Quote ↗ |
| TB-PG-GC | Pyrolytic Graphite & Glassy (Vitreous) Carbon | C | 7440-44-0 | ≥99.999% (5N CVD Pyrolytic Graphite & Polymeric Glassy Carbon) | PG plates 0.5–12 mm; Glassy carbon rods, plates, wafers, & crucibles | Quote ↗ |
| TB-GR-SIC | CVD SiC-Coated & TaC-Coated Graphite Susceptors, Wafer Carriers & Heaters | C + CVD β-SiC (80–150 µm) / TaC | 409-21-2 | < 5 ppm Purified Isostatic Graphite + 6N CVD β-SiC or Sintered TaC Coating | 2", 4", 6", 8" Wafer Pocket Susceptors, Multi-Wafer Planetary Discs, & Custom Heaters | Quote ↗ |
| TB-CFC-PL | Carbon-Carbon (C/C) Composite Plates, Charging Grids, Channels & Fasteners | C/C (2D / 2.5D Carbon-Fiber Reinforced Carbon) | 7440-44-0 | CVI / Pitch-Densified 2D & 2.5D Carbon-Carbon Composite (<200 ppm or <20 ppm Purified) | Plates 1–30 mm, U/L-Profiles, Charging Grids, & M6–M24 C/C Bolts/Nuts/Rods | Quote ↗ |
| TB-GR-CRU | High-Purity Graphite Crucibles, Stopper Rods & Continuous Casting Dies | C (99.9%–99.999%) | 7440-44-0 | Isostatic Fine-Grain (<20–50 ppm Ash) & Halogen-Purified (<5 ppm Ash) Grades | Crucibles 5 mL to 50 L; Induction Susceptor Crucibles; Continuous Casting Dies | Quote ↗ |
| TB-GR-FL | High-Purity Flexible Graphite Foil, Hot-Press Release Sheets & Vacuum Gaskets | C (99.5% – 99.95% Exfoliated Graphite) | 7440-44-0 | 99.5% Industrial, 99.85% Nuclear (<50 ppm S/Cl), & 99.95% Semiconductor Grade | Thickness 0.05 mm, 0.13 mm, 0.25 mm, 0.38 mm, 0.50 mm, 0.80 mm, 1.0 mm, 1.5 mm, 2.0 mm, 3.0 mm | Quote ↗ |
TB-GR-CRPrecision CNC-turned fine-grain isostatic graphite crucibles with low ash content (<20–500 ppm) for non-ferrous, precious metal, alloy, and crystal-growth melting.
TB-GR-CNCPrecision CNC-machined isostatic graphite vacuum-furnace heaters, susceptors, brazing fixtures, wafer carriers, and graphite nuts/bolts made to customer CAD drawings.
TB-GR-PLPrecision ground fine-grain and isostatic graphite sheets, setter plates, EDM blocks, rods, and impermeable resin-impregnated bipolar plates.
TB-GR-MLDHigh-compressive-strength fine-grain graphite Spark Plasma Sintering (SPS) die/punch sets, hot-press sleeves, continuous casting dies, and polished ingot molds.
TB-GR-FLTHigh-purity graphitized soft felt rolls, CNC-machined rigid graphite insulation cylinders/boards, and activated battery electrode felts for vacuum furnaces and energy storage.
TB-PG-GCUltra-pure 5N CVD pyrolytic graphite (anisotropic thermal/diamagnetic plates) and mirror-polished gas-impermeable glassy (vitreous) carbon electrodes, wafers, and crucibles.
TB-GR-SICCTE-matched purified isostatic graphite susceptors encapsulated in dense 6N CVD β-SiC or tantalum carbide (TaC) coatings for GaN MOCVD, SiC CVD epitaxy, and 2,200 °C PVT crystal growth.
TB-CFC-PLHigh-strength 2D/2.5D carbon-fiber-reinforced carbon (C/C, CFC) composite structural plates, charging grids, hot-press sleeves, and M6–M24 threaded fasteners for vacuum furnaces up to 2,500 °C.
TB-GR-CRUPrecision-machined high-purity isostatic graphite melting crucibles, clay-free analytical fusion capsules, and continuous casting dies for precious metals, copper alloys, silicon, and crystal growth.
TB-GR-FLBinder-free exfoliated flexible graphite foil (0.05–3.0 mm) for Spark Plasma Sintering (SPS) die/punch release liners, high-temperature vacuum gaskets, and anisotropic heat spreaders.
Submit your purity grade, geometry, quantity, and documentation requirements. Every order includes the producing mill's batch Certificate of Analysis (COA) and pre-shipment dimensional verification.