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Our EDM Specialty Graphite


Specialty Graphite Grade R 8650
finishing grade for highest accuracy
Material: graphite
Forming: isostatically pressed
Application: EDM finishing

Typical data
Property Unit Value
 Test standard
Bulk density g/cm3 1.84 DIN IEC 60413 / 203
Open porosity Vol. % 10 DIN 66133
Average grain size µm
inch		 7
0.0003		  
Medium pore size µm
inch		 0.8
0.00003		 DIN 66133
Permeability
(air at 20°C / 68°F)		 cm2/sec
Darcys		 0.03
0.5·10-3		 DIN 51935
Rockwell hardness   95
HR 5/100		 DIN IEC 60413 / 303
Shore hardness   75 DIN IEC 60413 / 302
Flexural strength N/mm2
psi		 65
9400		 DIN IEC 60413 / 501
Compressive strength N/mm2
psi		 150
21750		 DIN 51910
Young‘s modulus N/mm2
psi		 12500
1.8·106		 DIN 51915
Specific electrical resistivity µm
inch		 14
5.5·10-4		 DIN IEC 60413 / 402
Thermal conductivity W·m-1·K -1
Btu/(Ft·hr·°F)		 90
52		 DIN 51908
Therm. expansion
(20-200° C / 68-392°F)		 K-1 3.9·10-6 DIN 51909
Ash value ppm 200 DIN 51903




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R 8340
more...		 R 8500 X
more...		 R 8500
more...
R 8510
more...		 R 8650
more...		 R 8710
more...



This document has been prepared according to the best current knowledge and is intended to provide general information about our products and their use. In view of the wide variety of possible applications, the above data should be regarded as general information and are no guarantee of certain features of our products in a given case. If you favour us with your order, please ask for information regarding the features needed for the proposed application. Our Technical Service will furnish a feature profile for such application without undue delay.














 
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