Huahao Sealing · Carbon Graphite Components
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.
| Antimony (M106H) | 500°C, 85-105 HS, <1.5% porosity |
| Copper (M106D) | 400°C, 80-100 HS, high conductivity |
| Babbitt (M254B) | 200°C, 70-90 HS, lowest friction |
| Density Range | 1.80 – 1.95 g/cm³ |
| Friction Coefficient | 0.04 – 0.15 |
| Pressure Rating | up to 25 MPa |
Doubled strength — metallic network raises compressive strength to 180-350 MPa, 2× unimpregnated graphite
Extremely low porosity — post-impregnation porosity below 2%, very low media permeability for high-pressure sealing
Thermal dissipation — metallic network thermal conductivity far exceeds pure graphite, preventing hot spots and thermal cracking
Grade selection by duty — antimony (high-temp), copper (conductive/high-load), Babbitt (high-speed/low-friction) each excel in their niche
Improved wear resistance — metal-filled pores create a hard wear surface, 2-3× longer life
Antimony — 500°C high-temp oil pumps, petrochemical seals
Copper — high-load bearings, electrical brushes, high-speed service
Babbitt — high-speed precision seals, compressor shaft seals
High-pressure seals — porosity below 2% for 25 MPa service
Heavy industry — metallurgy, mining, power equipment seals
| Grade Code | Temperature | Notes |
|---|---|---|
| M106H (Sb) | 500°C | Antimony, high-temp heavy-duty |
| M106D (Cu) | 400°C | Copper, conductive high-load |
| M254B (Babbitt) | 200°C | Babbitt, high-speed low-friction |
By temperature and duty: 500°C high-temp choose antimony (M106H); below 400°C needing conductivity/high-load choose copper (M106D); below 200°C high-speed precision choose Babbitt (M254B). Antimony has highest hardness, copper best conductivity, Babbitt lowest friction.
Yes. Antimony and copper-impregnated grades are chemically stable in water for pump seals. However, they are not suitable for food-grade drinking water — metal ions may leach out. Drinking water should use resin-impregnated grade (M106K).
Submit your duty parameters (temperature, pressure, media, speed) — engineers reply with grade selection and quotation within 24 hours.
