Graphite, Carbon C Material Information
Specifications
| Physical Properties | Metric | English | Comments |
|---|---|---|---|
| Average Grain Size | 7 μm | .0003 inch | |
| Open Porosity | 10% Vol. | 10% Vol. | |
| Density | 1.84 g/cc3 | 1.84 g/cc3 | |
| Median Pore Size | .8 μm | .0003 inch |
| Mechanical Properties | Metric | English | Comments |
|---|---|---|---|
| Hardness, Shore | 75 | 75 | DIN IEC 60413/302 |
| Youngs Modulus | 12.5 x 103 N/mm2 | 1.8 x 106 psi | DIN 51915 |
| Electrical Properties | Metric | English | Comments |
|---|---|---|---|
| Electrical Resistivity | 14 μohm-m | 5.5 x 10-4 ohm-inch |
| Thermal Properties | Metric | English | Comments |
|---|---|---|---|
| CTE, Linear 20-200°C | 0.6 – 4.3 μm/m-°C | 0.333- 2.39 μin/in-°F | |
| Heat Capacity | 0.69 J/g-°C | 0.165 BTU/lb-°F | |
| Thermal Conductivity | 90 W/m-K | 52 BTU-in/hr-ft2-°F | |
| Melting Point | 3650°C | 6600°F | Sublimes |
| Max Service Temperature, Inert | 3650°C | 6600°F | Sublimation Temperature |
| Descriptive Properties | Metric | English | Comments |
|---|---|---|---|
| Ash Value | 200 ppm | 200 ppm | |
| Color | Black |
NOTE: The information in this data sheet is for design guidance only. Forming methods and specific geometry could affect properties.
Overview
Carbon is present in two natural crystalline allotropic forms—graphite and diamond—each with its own separate crystal structure and properties. Natural Occurrence: Metamorphic rocks: marble, slate, schist. Weathering end product(s): flaky residue in soils. Virtually all graphite in use is artificially produced under controlled conditions. Graphite is a distinct material as it displays the properties of both a metal and a non-metal. It is typically grayish-black in color, opaque, and has a radiant black sheen. Although graphite is flexible, it is not elastic and has high electrical and thermal conductivity. It is also chemically inert and highly refractory. Since graphite displays low absorption of X-rays and neutrons, it is very valuable in nuclear applications. Data provided by AZO Materials.
Applications & Usage
- Arc Chambers
- Cup Shields
- Beam Entrance Apertures
- Suppression Ground Electrodes
- Refractory materials such as ladles, crucibles, molds, stopper rods and subentry nozzles
- Nuclear Reactor Moderator Rods
- Electric Motor Carbon Brushes
- Piston Rings
- Thrust Bearings
- Vanes
- Aircraft Jet Engine Fuel Pumps
Industries Using This Material
- Semiconductor
- Energy
- Aerospace