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History
The word, "tungsten" denotes a substance of high density, and is derived from the Swedish language, "tung", meaning "heavy," and "sten", meaning "stone." The chemical symbol for
tungsten is W, which stands for wolfram. The name came from medieval German smelters, who found that tin ores containing tungsten had a much lower yield. It was said that the tungsten devoured the tin "like a wolf". Pure tungsten metal was first isolated by two Spanish chemists, the de Elhujar brothers in 1723.
General Information
Tungsten has the highest melting point of any metal, and at temperatures over 3410°C (6170°F), has the highest
tensile strength. It has excellent corrosion resistance and is only attacked slightly by most mineral acids. Tungsten is extremely environmentally friendly.
Our Tungsten can now also be plated.
Main Tungsten Properties
|
Atomic Number |
74 |
|
Atomic Weight |
183.86 |
|
Maximum Density @ 20°C (68°F) |
19.3 g/cc; 0.697 lb/cu.in. |
|
Melting Point |
3410°C (6170°F) |
|
Linear Coefficient of Expansion |
4.3 x 10E-6°C
|
|
Thermal Conductivity @ 20°C |
0.40 cal/cm/°C/sec
|
|
Specific Heat @ 20°C |
0.032 cal/g/°C
|
|
Electrical Conductivity |
31% IACS
|
|
Tensile Strength @ Room Temp. |
100,000 - 500,000 psi
|
|
Tensile Strength @ 500°C (932°F) |
75,000 - 194,000 psi
|
|
Tensile Strength @ 1000°C (1832°F) |
50,000 - 75,000 psi
|
|
Poisson's Ratio |
0.284
|
|
Hardness (Mineral) |
7.5
|
|
Hardness (Vickers) |
3430
|
|
Hardness (Brinell) |
2570
|
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