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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. 

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  • Average Particle Size
  • Electrical Resistivity
  • Hardness
  • Flexural Strength
EDM-C3® Graphite
EDM-C3® Graphite
EDM-C3® Graphite
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-3® Graphite
EDM-3® Graphite
EDM-3® Graphite
EDM-3® graphite is the most preferred Ultrafine graphite grade and the proven industry standard.
Average Particle Size (μ)
  • <5
Flexural Strength (psi)
  • 13,300
Hardness (shore)
  • 73
Electrical Resistivity (μOhm-in)
  • 615
EDM-2® Graphite
EDM-2® Graphite
EDM-2® Graphite
EDM-2® graphite is an Ultrafine grade that displays high strength and good wear characteristics.
Average Particle Size (μ)
  • <5
Flexural Strength (psi)
  • 11,200
Hardness (shore)
  • 71
Electrical Resistivity (μOhm-in)
  • 620
EDM-1® Graphite
EDM-1® Graphite
EDM-1® Graphite
EDM-1® graphite is an Ultrafine graphite that provides good wear, speed, and finish.
Average Particle Size (μ)
  • <5
Flexural Strength (psi)
  • 9,700
Hardness (shore)
  • 69
Electrical Resistivity (μOhm-in)
  • 760
EDM-C200® Graphite
EDM-C200® Graphite
EDM-C200® Graphite
EDM-C200® graphite is a Superfine grade infiltrated with copper, ideal for improving cutting stability in conditions with poor flushing.
Average Particle Size (μ)
  • 10
Flexural Strength (psi)
  • 12,100
Hardness (shore)
  • 62
Electrical Resistivity (μOhm-in)
  • 114
EDM-200® Graphite
EDM-200® Graphite
EDM-200® Graphite
EDM-200 graphite is a Superfine grade that provides good strength, surface finish, and wear resistance.
Flexural Strength (psi)
  • 9,000
Electrical Resistivity (μOhm-in)
  • 580
Average Particle Size (μ)
  • 10
EDM-AF5® Graphite
EDM-AF5® Graphite
EDM-AF5® Graphite
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.
Average Particle Size (μ)
  • <1
Flexural Strength (psi)
  • 14,500
Hardness (shore)
  • 83
Electrical Resistivity (μOhm-in)
  • 850
EDM-4® Graphite
EDM-4® Graphite
EDM-4® Graphite
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.
Average Particle Size (μ)
  • <4
Flexural Strength (psi)
  • 17,500
Hardness (shore)
  • 76
Electrical Resistivity (μOhm-in)
  • 500
Related Product Categories
Glass Forming Graphite Grades

Our GLASSMATE® materials ensure optimal performance and increase yield in your curved glass forming applications.
Glass Handling Graphite Grades

Our materials ensure optimum performance and increased throughput for your hot glass handling applications.
Industrial Graphite Grades

From aerospace to energy, the breadth and depth of our graphite portfolio provides a wide range of characteristics to meet your application needs.
Life Sciences Graphite Grades

For internal medical applications, we produce a unique blended material that combines the quality of our high-strength premium graphite with the added benefit of being radiopaque.
Premium Graphite Components

Our portfolio of glass handling products help support you in key, high-temperature sections of the glass bottle line to increase pack rate and yield to reduce the operator's total cost of ownership.
Semiconductor Graphite Grades

Entegris manufactured graphite grades are segmented by grain size. These include 1, 5, and 10 micron, which are then further segmented by application.
Thermal Management Materials

Our unique foam graphite grades provide an istotropic heat dispersion to funnel heat away from sensitive electronics.