• Contact Us

EDM Graphite Grades


Each of our EDM graphite grades has been tailored for a specific range of electrode applications with benchmarked performance characteristics.

With our 50 years in the industry we have developed the best balance of metal removal rates, low electrode wear, and fine surface finish. Our EDM Electrode materials provide excellent total cost of ownership. Our manufacturing process is tightly controlled to provide you with consistent performance from block to block, year to year. Our educated applications engineers are available to assist with grade selection and machine parameters for your specific applications.

Our graphite grades are available as billets, semi-finished rods, blocks, and plates. 

Featured Content

EDM Graphite Grade Chart
Narrow Your Selection
EDM-200 graphite is a Superfine grade that provides good strength, surface finish, and wear resistance.
Electrical Resistivity (μOhm-in)
  • 580
Hardness (shore)
  • 68
Flexural Strength (psi)
  • 9,000
Average Particle Size (μ)
  • 10
Our Ultrafine EDM-4® graphite combines high strength with moderate hardness, which are ideal for intricate electrodes. The EDM-4 graphite performance characteristics provide excellent cost of ownership.
Electrical Resistivity (μOhm-in)
  • 500
Hardness (shore)
  • 76
Flexural Strength (psi)
  • 17,500
Average Particle Size (μ)
  • <4
EDM-C200® graphite is a Superfine grade infiltrated with copper, ideal for improving cutting stability in conditions with poor flushing.
Electrical Resistivity (μOhm-in)
  • 114
Hardness (shore)
  • 62
Flexural Strength (psi)
  • 12,100
Average Particle Size (μ)
  • 10
EDM-C3® graphite is a premium, Ultrafine grade graphite infiltrated with copper. It is unequaled for the production of fragile electrodes.
Electrical Resistivity (μOhm-in)
  • 127
Hardness (shore)
  • 66
Flexural Strength (psi)
  • 20,300
Average Particle Size (μ)
  • <5
EDM-2® graphite is an Ultrafine grade that displays high strength and good wear characteristics.
Electrical Resistivity (μOhm-in)
  • 620
Hardness (shore)
  • 71
Flexural Strength (psi)
  • 11,200
Average Particle Size (μ)
  • <5
EDM-3® graphite is the most preferred Ultrafine graphite grade and the proven industry standard.
Electrical Resistivity (μOhm-in)
  • 615
Hardness (shore)
  • 73
Flexural Strength (psi)
  • 13,300
Average Particle Size (μ)
  • <5
EDM-1® graphite is an Ultrafine graphite that provides good wear, speed, and finish.
Electrical Resistivity (μOhm-in)
  • 760
Hardness (shore)
  • 69
Flexural Strength (psi)
  • 9,700
Average Particle Size (μ)
  • <5
Our EDM-AF5® graphite is the premier Angstrofine graphite electrode material available on the market today with an average particle size of less than 1 micron.
Electrical Resistivity (μOhm-in)
  • 850
Hardness (shore)
  • 83
Flexural Strength (psi)
  • 14,500
Average Particle Size (μ)
  • <1