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Poco EDM Graphite Descriptions
Poco Graphite AF-5

AF5 Color Code: Gold

EDM-AF5 is the only graphite electrode material available on the market today with an average particle size of less than 1 micron. This particle structure gives EDM-AF5 superior strength, provides for fine surface finish (7Ra), gives excellent metal removal rate and high resistance to wear.

Specifications:
  • Avg. Grain Size: 1 Micron
  • Hardness: 87 Shore
  • Flex Strength: 17,000 psi
  • Resistivity: .00068 ohm/in.
  • Maximum Block Size: 2" x 8" x 24"
  • Method of Manufacture: Molded



Poco Graphite EDM-1

EDM-1 Color Code: White

EDM-1 is the lowest priced ultrafine grain graphite available from Poco. In addition to providing good wear resistance, speed, and finish, lower electrode fabrication costs are possible when larger electrodes are required.

Specifications:
  • Avg. Grain Size: 5 Micron
  • Hardness: 70 Shore
  • Flex Strength: 7,500 psi
  • Resistivity: .00074 ohm/in.
  • Maximum Block Size: 4" x 12" x 40"
  • Method of Manufacture: Molded



Poco Graphite EDM-150

EDM-150 Color Code: Brown

An isotropic fine grain graphite with excellent metal removal & resistance characteristics. Available in large block sizes & economically priced, EDM-150 is an excellent choice for larger electrodes. The high flexural strength & machinability of EDM-150 is unmatched by other materials in the Fine classification.

Specifications:
  • Avg. Grain Size: 14 Micron
  • Hardness: 68 Shore
  • Flex Strength: 7,800 psi
  • Resistivity: .00057 ohm/in.
  • Maximum Block Size: 6" x 24" x 60"
  • Method of Manufacture: Molded



Poco Graphite EDM-2

EDM-2 Color Code: Yellow

EDM-2 is an isotropic ultrafine grain graphite with high strength and good wear characteristics recommended where good detail, wear resistance, speed, and finish are desired. EDM-2 is an excellent all purpose grade for super alloys like titanium.

Specifications:
  • Avg. Grain Size: 5 Micron
  • Hardness: 73 Shore
  • Flex Strength: 10,000 psi
  • Resistivity: .00062 ohm/in.
  • Maximum Block Size: 4" x 12" x 40"
  • Method of Manufacture: Molded



Poco Graphite EDM-200

EDM-200 Color Code: Purple

EDM-200 is an isotropic superfine grain graphite providing good strength, surface finish, and wear resistance. Moderately priced, EDM-200 provides excellent repeatability from electrode to electrode and from job to job. Available in large block sizes.

Specifications:
  • Avg. Grain Size: 10 Micron
  • Hardness: 64 Shore
  • Flex Strength: 9,000 psi
  • Resistivity: .00048 ohm/in.
  • Maximum Block Size: 6" x 24" x 60"
  • Method of Manufacture: Molded



Poco Graphite EDM-3

EDM-3 Color Code: Red

EDM-3 is an isotropic ultrafine grain graphite which offers high strength with outstanding wear and fine surface finish characteristics easily machined to thicknesses of .005 or less.

Specifications:
  • Avg. Grain Size: 5 Micron
  • Hardness: 76 Shore
  • Flex Strength: 13,500 psi
  • Resistivity: .00054 ohm/in.
  • Maximum Block Size: 4" x 12" x 40"
  • Method of Manufacture: Molded



Poco Graphite EDM-4

EDM-4 Color Code: Navy

POCO's premier offering in the Ultrafine classification. This highly isotropic grade combines extraordinary strength with moderate hardness, yielding superior electrode fabrication characteristics. The consistency of EDM-4 also makes it an excellent choice for highly detailed wire cut electrodes. EDM-4 is reasonably priced, making it the cost performance leader for most applications requiring a high quality Ultrafine graphite. EDM-4 is the ideal choice for jobs requiring excellent machinability, low electrode wear & smooth surface finishes.

Specifications:
  • Avg. Grain Size: 4 Micron
  • Hardness: 76 Shore
  • Flex Strength: 15,800 psi
  • Resistivity: .00050 ohm/in.
  • Maximum Block Size: 4" x 12" x 40"
  • Method of Manufacture: Molded



Poco Graphite EDM-C200

EDM-C200 Color Code: Green/White

EDM-C200 is a high density superfine graphite, infiltrated with copper, which offers excellent metal removal rates and good wear resistance. EDM-C200 provides improved cutting stability in poor flushing conditions. EDM-C200 is an excellent material for cutting aerospace alloys.

Specifications:
  • Avg. Grain Size: 10 Micron
  • Hardness: 60 Shore
  • Flex Strength: 13,000 psi
  • Resistivity: .00007 ohm/in.
  • Maximum Block Size: 4" x 8" x 12"
  • Method of Manufacture: Impregnated



Poco Graphite EDM-C3

EDM-C3 Color Code: Orange

EDM-C3 is a high density graphite infiltrated with copper. Recommended where speed, wear, and surface finish are important. Unequalled for fragile electrodes, many EDMers choose this grade to compensate for operator inexperience or where poor flushing conditions exist.

Specifications:
  • Avg. Grain Size: 5 Micron
  • Hardness: 67 Shore
  • Flex Strength: 16,500 psi
  • Resistivity: .00012 ohm/in.
  • Maximum Block Size: 2" x 8" x 12"
  • Method of Manufacture: Impregnated
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