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Rigid Graphite POCO EDM-3

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Description

The rigid graphite is a POCO graphite 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 0.1mm or less.


With regard to crystalline structure, POCO graphite has a typical hexagonal structure. POCO graphites are also highly isotropic with respect to their structure and properties. The isotropy factor is between 0.97 and 1.03 with 1.00 being perfect. The high degree of isotropy makes POCO graphites useful in many applications where an anisotropic material would fail. It also allows for maximum utilization of material as machining orientation is of no importance.


The pore diameter of POCO’s graphites ranges from 0.2 microns nominal, to 2.0 microns nominal, for our various grades and densities. The open porosity ranges from 75% open to 95% open and the pores are generally spherical in shape.


POCO graphite is a high purity graphite of 99.95%. The rest 0.05% is corresponding to ash impurities. This ash or residual product generally results from natural contamination of the raw material used to produce graphite and may be introduced to a lesser extent during processing of the raw material or graphite products. This graphite can be purified more by simply heat treating to very high temperatures, usually in excess of 3000 °C in an inert atmosphere. This temperature will volatilize most heavy elements present.

This material data has been provided by Matmatch.

"Typical" values were obtained via a literature search. "Predicted" values were imputed via artificial intelligence technology. While we have placed significant efforts in ensuring data accuracy, "typical" and "predicted" data should be considered indicative and verified by appropriate material testing. Please do contact us if additional information on the the predicted data method is required.
All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

Ashby charts

Properties

General

PropertyValue

Particle size D50

5 μm

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Mechanical

PropertyTemperatureValue

Compressive strength

23.0 °C

125 MPa

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Flexural strength

23.0 °C

91.7 MPa

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Hardness, Shore A

23.0 °C

73 [-]

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Thermal

PropertyValue

Max service temperature, inert

3000 °C

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Electrical

PropertyTemperatureValue

Electrical resistivity

23.0 °C

1.56E-5 Ω·m

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Technological properties

Property
Application areas

EDMing of fine detailed electrodes, punch & die sets, plastic injection molds, threading electrodes, use in aerospace metal cutting

Processing methods

Electrical discharge machining