Regular Tungsten Products
Product Description
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No
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Product
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Size mm
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Standard
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Characteristic and application
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1
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Tungsten plate
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>1.0×450×L
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GB3875-83
ASTMB760-86
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*Melting point：3410℃
*Density：19.3g/m3
* Excellent mechanical property
* Widely used in electricity, lighting, vacuum metal lzing, Medical technology, semi-conductor, high temperature furnace, heat shields
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2
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Tungsten sheet
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>0.1-0.9×450×L
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GB3875-83
ASTMB760-86
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3
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Tungsten strip
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0.1-0.4×0.2-0.8×L
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Q/XB1103-1999
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4
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Tungsten bar
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Φ3-Φ60×L
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GB4187-84
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5
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High density W alloy sheet
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1.0-5.0×450×L
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ASTM B777-87
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6
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High density W alloy bar
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Φ10-Φ60×L
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ASTM B777-87
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Properties
Tungsten metal is often brittle and hard to work in its raw state; however, if pure, it can be cut with a hacksaw. The pure form tungsten metal is used mainly in electrical applications. Usually tungsten contains small amounts of carbon and oxygen, which give tungsten metal its considerable hardness and brittleness. Metal tungsten is worked by forging, drawing, extruding, or sintering. Of all metals in pure form, tungsten metal has the highest melting point (3,422 'C, 6,192 'F), lowest vapor pressure and (at temperatures above 1,650 'C) the highest tensile strength. Tungsten metal has the lowest coefficient of thermal expansion of any pure metal. Alloying small quantities of tungsten with steel greatly increases its toughness
Tungsten metal features the lowest vapor pressure of all metals, very high module of compression and elasticity, very high thermal creep resistance, high thermal and electrical conductivity and, last but not least, a very high coefficient of electron emission. The latter can even be improved by alloying tungsten metal with certain metal oxides.
Most of these unusual properties are due to the half-filled 5d electron shell with a very high binding energy of the tungsten metal lattice. Based on these properties, pure tungsten metal, tungsten alloys and some tungsten compounds cannot be substituted in many important applications in different fields of modern technology.
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