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Ameri-Graph EDM Descriptions
While metallics such as copper were originally the material of choice in other parts of the world, graphite has been preferred as an electrode material in the U.S. market since it was first developed for EDM. Belmont''s exclusive line of Ameri-Graph EDM materials is manufactured in the U.S.A. All of the materials, from our US-300 to US-950 are isostatically molded to provide you consistent results regardless of the direction of the cut.


Ameri-graph Graphite US-300

US-300 Color Code: Yellow & White

US-300 is an isotropic graphite which excels in large cavity work. Offers large block size, excellent metal removal rate, and better wear resistance than other general purpose graphites.
  • Avg. Grain Size:.0006 in.
  • Density:1.76
  • Hardness:50 Shore
  • Flex Strength:6,000 psi
  • Resistivity:.0005 ohm/in.
  • Maximum Block Size:12" x 24" x 72"



Ameri-graph Graphite US-500

US-500 Color Code: Brown & White

US-500 is an isotropic graphite which provides very good wear resistance and fine surface finish. US-500 is recommended for detailed mold and die work. Available in large block size.
  • Avg. Grain Size:.0005 in.
  • Density:1.78
  • Hardness:65 Shore
  • Flex Strength:6,500 psi
  • Resistivity:.0006 ohm/in.
  • Maximum Block Size:12" x 24" x 72"



Ameri-graph Graphite US-600

US-600 Color Code: Orange & White

US-600 is an isotropic all-purpose high quality graphite which provides excellent wear resistance and surface finish. Can be easily machined into electrodes with thin cross sections and ribs. Used for fine detail mold and die work. Excellent choice for orbital EDM machines.
  • Avg. Grain Size:.0005 in.
  • Density:1.80
  • Hardness:66 Shore
  • Flex Strength:8,000 psi
  • Resistivity:.0006 ohm/in.
  • Maximum Block Size:12" x 24" x 72"



Ameri-graph Graphite US-700

US-700 Color Code: Gold & White

US-700 is an isotropic high quality graphite. A good universal material which yields both good metal removal rates and wear characteristics, while producing an excellent surface finish.
  • Avg. Grain Size:.0004 in.
  • Density:1.82
  • Hardness:65 Shore
  • Flex Strength:8,400 psi
  • Resistivity:.00055 ohm/in.
  • Maximum Block Size:12" x 24" x 36"


Ameri-graph Graphite US-800

US-800 Color Code: Blue & White

US-800 is an isomolded, very fine grain size, high-strength, isotropic graphite.
  • Avg. Grain Size:.0003 in.
  • Density:1.78
  • Hardness:75 Rockwell H / 67 Shore
  • Flex Strength:8,700 psi
  • Resistivity:.00050 ohm/in.
  • Maximum Block Size:12" x 24" x 36"



Ameri-graph Graphite US-950

US-950 Color Code: Gray & White

A micro grain, high strength, isotropic graphite which allows exceptional surface finishes associated with low electrode wear and excellent metal removal.
  • Avg. Grain Size:.0002 in.
  • Density:1.86
  • Hardness:80 Shore
  • Flex Strength:11,000 psi
  • Resistivity:.00063 ohm/in.
  • Maximum Block Size:12" x 12" x 36"
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