High-compressive-strength fine-grain graphite Spark Plasma Sintering (SPS) die/punch sets, hot-press sleeves, continuous casting dies, and polished ingot molds.
Spark Plasma Sintering (SPS / FAST), uniaxial vacuum hot pressing, diamond-segment sintering, and continuous non-ferrous strip/rod casting push graphite to its mechanical limit under simultaneous uniaxial pressure (30–80 MPa) and high-current Joule heating up to 2,200 °C. Using high-strength ultra-fine isostatic graphite (compressive strength 110–150 MPa) maximizes clamping pressure ratings while delivering mirror-smooth cavity walls for clean part ejection.
We supply complete matched SPS die + upper/lower punch + spacer sets (plus flexible graphite foil liner rolls), split ingot molds, and continuous casting dies.
| Property / Metric | Nominal Reference Value (Grade Dependent) |
|---|---|
| Compressive Strength | 105–155 MPa (high-strength SPS grade) |
| Flexural Strength | 55–85 MPa |
| Bulk Density | 1.84–1.92 g/cm³ |
| Typical Uniaxial SPS Pressure | Up to 50–80 MPa (geometry & wall-ratio dependent) |
| Cavity Surface Finish | Fine-turned / polished Ra 0.4–1.6 µm |
Reference values reflect typical sintered, fused, or wrought grades. Exact batch test figures are confirmed on your written quotation and accompanying lot Certificate of Analysis.
For SPS/hot-press sets, specify inner bore ID (e.g., 10, 15, 20, 25, 30, 50 mm), outer die OD, die height, punch length, punch-to-die diametral clearance (accounting for 0.15–0.2 mm flexible graphite foil if used!), thermocouple sight hole depth/diameter, and max uniaxial load.
Include target quantity, destination country/postal code for express air freight calculation, and any special cleanroom bagging or certification requests.
Prepare Graphite Ingot Casting & Hot-Press Sintering Molds RFQ ↗Complementary furnaceware, substrates, PVD consumables, and refractory hardware frequently ordered together.
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-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-HBN-MCHot-pressed hexagonal boron nitride (h-BN) crucibles, rods, plates, and precision CNC components combining extreme thermal shock resistance, molten-metal non-wetting, and electrical insulation.
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.