Babbitt-Impregnated Carbon Graphite

Babbitt-Impregnated Carbon Graphite

Carbon/Graphite and Graphite Materials are inherently porous after the material processing.  It is common to impregnate these materials with a Resin or Metal to:

  • Increase the Strength,
  • Increase the Thermal Conductivity,
  • Reduce the Resistivity,
  • Reduce the Porosity, and/or
  • Impart Impermeability.

Babbitt metals are a class of alloys dominant in either Tin (Sn) or Lead (Pb) also containing Antimony (Sb), Copper (Cu), and/or Arsenic (As). The alloys were originally developed for “cast-in-place” capability and it is non-galling characteristic.  Because of the low melting point Babbitt impregnated Carbon/Graphite or Graphite components offers a more cost effective solution.

Some end-users experience that certain metals in alloys such as a Leaded Babbitt can improve the friction and wear characteristics of the Carbon/Graphite or Graphite Component.  While this beneficiation may be actual, we have not seen this effect in laboratory testing.

Babbitt alloys generally melt in the range of 433 oF (223 oC) to 479 oF (248 oC)   which significantly constrains its application temperature limits as the Seal Face or Bearing Surface can be significantly above the process temperature.


Custom Components & Parts

We develop parts that are customized to each of our customer’s specific application requirements. Our unique technical knowledge and manufacturing expertise allows us to customize parts within our existing product line or as part of our new product development.

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Mechanical Seals

St. Marys Carbon custom manufactures a variety of seal grades to suit any sealing application. We offer blank stock, various types of impregnations, intricately machined seals, non-polished seals, and polished seals. Our mechanical seals are used in a variety of pumping applications and are especially beneficial in any type of dry-running, harsh (e.g., high temperature, chemically corrosive) and sanitary environments.

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Bearings / Bushings

St. Marys Carbon custom manufactures many sizes, shapes and quantities of bearings / bushings, including radial, thrust/axial and sleeve. Our bearings / bushings are used in a variety of pumping applications and are especially beneficial in any type of dry-running, sanitary environments and harsh conditions (e.g., high temperature, chemically corrosive).

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