Poco Graphite TRA Semiconductor Grade Graphite

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Poco Graphite TRA Semiconductor Grade Graphite (discontinued **)
Categories:	Carbon; Graphite
Material Notes:	Although it is impossible to identify differences between various grades of graphite by looking at them, each grade has a special set of characteristics and physical properties that determine their performance under specific conditions. The manufacturing process for each grade is tightly controlled to produce materials that have a uniform microstructure and the right balance of strength, grain size and hardness to offer optimum performance for their intended applications.
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Physical Properties	Metric	English	Comments

Apparent Bulk Density	1.72 g/cc	0.0621 lb/in³
Particle Size	5.0 µm	5.0 µm

Mechanical Properties	Metric	English	Comments
Hardness, Shore D	72	72
Tensile Strength, Yield	53.0 MPa	7690 psi	Estimated at 70% of flexural strength
Flexural Strength	75.0 MPa	10900 psi
Compressive Strength	118 MPa	17100 psi

Electrical Properties	Metric	English	Comments
Electrical Resistivity	0.00156 ohm-cm	0.00156 ohm-cm

Thermal Properties	Metric	English	Comments
CTE, linear	7.90 µm/m-°C	4.39 µin/in-°F
Thermal Conductivity	85.0 W/m-K	590 BTU-in/hr-ft²-°F

Descriptive Properties
Oxidation Threshold	450°C		1% weight loss in 24 hours. Increases by approximately 100°C if graphite is purified.

**
Materials flagged as discontinued () are no longer part of the manufacturer’s standard product line according to our latest information. These materials may be available by special order, in distribution inventory, or reinstated as an active product. Data sheets from materials that are no longer available remain in MatWeb to assist users in finding replacement materials.

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CPOCO18 / 85595

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