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We exercise strict control over raw material selection, processing parameters and dimensional tolerances for our specialty graphite, which is already trusted in high-end sectors such as cemented carbide, MIM, glass, ceramics, fused silica and precious metals.
Backed by full-spectrum in-house technology—from graphite design and production to heating, sintering and melting—Harog Technology delivers one-stop R&D and industrial services for vacuum sintering furnaces.
Technical Parameters
Datasheet of Harog’s Graphite for Vacuum Furnace
SKU | Density | Electrical Resistivity | Flexural Strength | Compressive Strength | Shore Hardness | Thermal Conductivity | CTE (RT~600℃） | Porosity |
g/cm3 | μΩ·m | MPa | MPa | HSD | W/(m·K) | x10-6/℃ | % | |
HA09 | 1.91 | 9.9 | 46 | 105 | 61 | 123 | 4.6 | 10 |
HA11 | 1.86 | 9.3 | 38.3 | 75.5 | 44 | 128 | 4.4 | 10 |
HA12 | 1.93 | 9.9 | 56 | 110 | 64 | 137 | 5.7 | 8.7 |
HA13 | 1.79 | 12 | 26.1 | 64.8 | 42.9 | 117 | 4.2 | 12 |
HA14 | 1.88 | 14 | 68.6 | 115.7 | 63.9 | 90 | 5 | 8.6 |
Application Scenes
• High-temperature sintering of cemented carbide, MIM stainless steel, tungsten-heavy alloys
• Debinding-sintering of ceramic & quartz components (transparent, high-purity grades)
• Vacuum brazing and heat treatment of aerospace Ni-/Co-based super-alloys
• Directional solidification and melting of precious metals (Pt, Rh, Ir) under 10⁻³ Pa
• CVD coating of SiC, pyrolytic carbon or diamond films
Technical Advantages
• Ultra-low ash content minimises out-gassing and furnace contamination
• High bulk density guarantees 40 % higher flexural strength than conventional ISO-63
• Low electrical resistivity – uniform Joule heating, ±3 °C field uniformity at 2,200 °C
• Low CTE – excellent thermal-shock resistance.
• High precision machining for both dimensional and surface finish, no post-bake distortion
Product Features
• Grade portfolio: DS-4 (fine-grain), HPD-6 (ultra-fine), CFC screws/fasteners for weight saving
• Custom hot-zone assemblies: heater, susceptor, insulation sleeves, gas-riser tubes, charging racks
• Protective SiC or PyC coating available: service life extended 2.5× in oxygen/trace-moisture ambients
• Full traceability: raw batch, impurity spectra, high-temp pilot run data provided with every shipment
