ASTM B760 Tungsten Plate
Typical Size Capabilities for Flat Sheets and Plates
Thickness Range .002”(.05mm) – 2.0” (50mm)
Width Max Range 2.0” (50mm) – 19.7” (500mm)
Length Max Range 4” (100mm) – 59” (1500mm)
Description
Tungsten is a greyish-white lustrous metal; it is solid at room temperature. It has the highest melting point, lowest vapor pressure at temperatures above 1650 °C, the highest strength, and the highest hardness among all pure metals and alloys. Pure tungsten metal was first isolated by two Spanish (de Elhujar) brothers in 1783. The word "tungsten" comes from a Swedish "tung sten", meaning "heavy stone." Tungsten's chemical symbol "W" comes from the element's other name, wolfram, which is derived from wolframite, the mineral the element was discovered in.
Products Description
Common applications for pure tungsten filaments
Lighting. Tungsten has been widely used as a filament in traditional incandescent light bulbs. Due to their low energy efficiency, high heat generation and short life span, these bulbs have been gradually replaced by fluorescent and more recently by LED lamps.
Furnace components and high-temperature alloys. Because of its high melting point and strength, tungsten and its alloys are used in a wide range of high-temperature applications, such as arc welding electrodes, heating elements and shields in high-temperature vacuum furnaces, and turbine blades in generators and aircraft engines.
X-ray targets. Tungsten is the most used target material in the X-ray generation process. Tungsten's high atomic number increases the intensity of X-rays at certain voltages and currents. Tungsten's high melting point also makes the X-ray anode white-hot.
Radiation Shielding. Tungsten alloy combines the advantages of high density, high radiation absorption, high melting point, and good corrosion resistance, making it an ideal material for shielding against various types of radiation.
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Tungsten Typical Physical Properties |
||
|---|---|---|
| Density @ 20°C | g/cm3 | 19.25 |
| Melting Point | °F | 6188 |
| °C | 3420 | |
| Electrical Conductivity @ 20°C | S/m | 18.2 x 106 |
| Electrical Resistivity @ 20°C | (Ω·mm2)/m | 0.055 |
| Thermal Conductivity @ 20°C | W/(m·K) | 164 |
| Specific Heat @ 20°C | J/(g·K) | 0.13 |
| Coefficient of Linear Thermal Expansion @ 20°C | m/(m-K) | 4.4 |
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