Graphite

Photograph courtesy of Mineralite
An amorphous form of carbon, made of carbon atoms bound hexagonally in sheets. It is used as a thermal-insulating electrical-conductor, as a nuclear-reactor moderator and as a self-lubricant.
A piece of machined graphite.
Graphite is very easy to machine and obtain a very high quality finish. However, it should be noted that graphite is a very abrasive material to machine and tends to wear cutters very quickly. Diamond cutters are recommended for extended machining.


Also known as
Black Lead - natural graphite of the sort used in pencils.

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Density 1400 to 2250 kgm-3Clip
Melting Point 3910 KClip
Boiling Point 4800 KClip
Youngs modulus 170E9 to 340E9 Nm-2Clip
Linear expansivity 0.0000079 K-1Clip
Specific heat capacity 838 Jkg-1K-1Clip
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See also: Diamond, Molybdenum Disulphide.

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Subjects: Chemistry