By their very nature, Carbon Graphite and Electrographite Materials are porous with the majority of this porosity being interconnected.  After manufacture, both materials are often used as is with the open porosity. Other applications however are benefited by the porous component being impregnated to either reduce or close off the Porosity (e.g., in the case of a Mechanical Seal Component), or increase specific characteristics (e.g., Strength, Electrical Conductivity, Thermal Conductivity, Oxidation Resistance).

Impregnation options include:

  • Various resins
  • Inorganic salts
  • Molten metals
  • Antimony
  • Babbitt
  • Bronze
  • Copper
  • Silver
  • Molten ceramic

In addition to the impregnants listed above, the physical and functional characteristics of the composite Carbon Graphite or Electrographite can be further modified in several ways:

  • Inclusion of inorganic and/or metallic additives during mixing early in the production cycle
  • Impregnation with a resin, inorganic solution, colloidal suspension, oil or wax, or molten metal
  • Applying a coating. Common examples are TeflonTM, Pyrolytic Carbon or Pyrolitic Graphite, Silicon Carbide, Diamond Like and Diamond Coatings

The combination of different carbon formulations and raw materials, additives, baking temperature, impregnation, and coatings leads to a plethora of Grades designed to meet a very wide range of applications. To date St. Marys Carbon has 476 unique proprietary Grades to meet the market’s requirements.

This Grade portfolio is not static as we continue to develop new grades meeting the needs of new applications and the changing needs of legacy applications.

Contact us with your specific application and we will find the existing Grade or develop a new Grade to meet your needs.