8 carbon graphite material grades covering -200°C to 600°C, pH 0-14, from food-grade to heavy industry.
Resin-impregnated graphite is produced by vacuum-impregnating baked carbon graphite with phenolic, epoxy or furan resin, filling the micropores to raise density to 1.75-1.80 g/cm³. Huahao Sealing's M106K grade is rated 220°C and FDA-compliant for food machinery, pharmaceutical equipment and drinking-water pumps requiring contamination-free self-lubrication.
DAntimony-impregnated graphite is produced by high-pressure impregnation of carbon graphite with molten antimony metal, forming a metallic network in the micropores to raise density to about 2.2 g/cm³ (third-party tested: 2.20 g/cm³ density, 2% porosity, 190 MPa compressive strength, 92 HS). Huahao Sealing's M106D grade is rated 500°C with anti-oxidation treatment, offering high hardness and excellent wear resistance for high-temperature oil pumps, compressors and petrochemical equipment.
CuCopper graphite is produced by vacuum-impregnating carbon graphite with molten copper alloy, forming a metallic network in the micropores. Huahao Sealing's copper-impregnated grades have density 1.85-1.95 g/cm³, combining copper's electrical and thermal conductivity with graphite's self-lubrication for high-load, high-speed bearings and electrical carbon brushes.
| Grade | Type | Max temp. | Max pressure | Max speed | Compressive |
|---|---|---|---|---|---|
| M106H | Epoxy-resin-impregnated | 180°C | 1.5 MPa | 25 m/s | 92 MPa |
| M106D | Antimony-impregnated | 500°C | 2.0 MPa | 25 m/s | 190 MPa (tested) |
| M106K | Food-grade resin-impregnated (FDA) | 220°C | 1.5 MPa | 20 m/s | 90 MPa |
| M191T | Carbonized (baked) | 600°C | 2.5 MPa | 20 m/s | 100 MPa |
| 204B | Seawater-corrosion-resistant impregnated | 200°C | 1.5 MPa | 25 m/s | 95 MPa |
| 59U | Babbitt-inlaid carbon graphite | 180°C | 1.0 MPa | 15 m/s | 88 MPa |
M106D compressive/flexural/hardness values are third-party tested. Full physical properties per grade on detail pages.
Common selection guidance — submit your parameters for engineering confirmation.
M106H is epoxy-resin-impregnated, rated to about 180°C; M106D is antimony-impregnated, rated to 500°C, with third-party tested compressive strength 190 MPa, flexural strength 72 MPa and Shore hardness 92 HS. High-temperature service (>180°C) requires M106D.
M106K is a food-grade resin-impregnated carbon graphite, FDA and EU food-contact compliant, completely oil-free self-lubricating, suited for chocolate mixers, filling machines, and pharmaceutical equipment.
M191T, a carbonized (baked) grade rated to 600°C, operates at extreme high temperatures without metal impregnation, suited for solar-thermal molten salt pumps and metallurgical furnaces at 500–600°C.
204B, with a special corrosion-resistant impregnation process, resists seawater galvanic corrosion and is DNV certified, suited for marine stern shaft seals, seawater cooling pump bushings, and rudder bearings.
Impregnation fills the carbon graphite substrate micro-pores, reducing porosity below 2%, boosting compressive strength, wear resistance, and density, while tailoring performance for specific service (high-temp, corrosion, food). Different impregnants (resin, antimony, metal) determine the temperature ceiling and corrosion characteristics.
Carbon graphite is a high-purity carbon-based material made from petroleum coke and pitch coke through mixing, forming and baking. Huahao Sealing supplies multiple carbon graphite grades with density 1.55-1.85 g/cm³, temperature range -200 to 600°C, featuring natural self-lubrication, chemical inertness and high thermal conductivity for mechanical seal rings, bushings and bearings.
Resin-impregnated graphite is produced by vacuum-impregnating baked carbon graphite with phenolic, epoxy or furan resin, filling the micropores to raise density to 1.75-1.80 g/cm³. Huahao Sealing's M106K grade is rated 220°C and FDA-compliant for food machinery, pharmaceutical equipment and drinking-water pumps requiring contamination-free self-lubrication.
Antimony-impregnated graphite is produced by high-pressure impregnation of carbon graphite with molten antimony metal, forming a metallic network in the micropores to raise density to about 2.2 g/cm³ (third-party tested: 2.20 g/cm³ density, 2% porosity, 190 MPa compressive strength, 92 HS). Huahao Sealing's M106D grade is rated 500°C with anti-oxidation treatment, offering high hardness and excellent wear resistance for high-temperature oil pumps, compressors and petrochemical equipment.
Copper graphite is produced by vacuum-impregnating carbon graphite with molten copper alloy, forming a metallic network in the micropores. Huahao Sealing's copper-impregnated grades have density 1.85-1.95 g/cm³, combining copper's electrical and thermal conductivity with graphite's self-lubrication for high-load, high-speed bearings and electrical carbon brushes.
Babbitt-impregnated carbon graphite is produced by impregnating carbon graphite with molten Babbitt alloy (Sn-Sb-Cu system), forming a low-friction metallic network. Huahao Sealing's grade is rated 200°C with extremely low friction coefficient and excellent running-in properties for high-speed precision mechanical seals and compressor seal rings.
Isostatic graphite is a high-purity graphite formed by cold isostatic pressing (CIP), featuring high isotropy and uniform structure. Huahao Sealing supplies isostatic graphite blanks and precision-machined parts with purity above 99.99%, density 1.75-1.85 g/cm³ and isotropy below 5%, for semiconductor, photovoltaic, nuclear and high-precision sealing applications.
Electrographite is carbon graphite material that has undergone high-temperature graphitization at 2500-3000°C, with crystal structure fully transformed to graphitic structure. Huahao Sealing's electrographite grades are rated 600°C with extreme chemical inertness and excellent electrical conductivity for sealing and conductive components in metallurgy, chemistry and battery applications.
Metal-impregnated graphite is a high-performance composite made by filling carbon graphite micropores with molten metal (antimony, copper, Babbitt) under vacuum/high pressure. Huahao Sealing supplies multiple metal-impregnated grades balancing graphite's self-lubrication with metal's strength and conductivity, covering 200-500°C temperature ranges from food-grade to heavy industry.
Impregnated graphite blanks for shops that machine their own carbon graphite parts — job shops, seal reconditioning works and component OEMs. Huahao Sealing has produced carbon graphite since 2006 and supplies extruded rod and tube, molded ring blanks, isostatic block stock and near-net-shape blanks, in unimpregnated, phenolic/furan/epoxy resin, antimony, copper or Babbitt impregnated condition. Unimpregnated base density 1.55-1.70 g/cm³ with 8-15% porosity, below 2% after impregnation. We machine to customer drawing and advise on pre- versus post-impregnation machining routes, carbide versus PCD tooling and stress relief.
Submit media, temperature, pressure, and speed parameters.
Engineers recommend a suitable grade from duty data and experience.
Samples provided for testing to confirm material performance.
Submit your duty parameters — engineers reply with grade selection and quotation within 24 hours.
