- tungsten, molybdenum, tantalum, niobium and rhenium,
ods-copper,cemented carbide.
Products
Tungsten alloy
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Main Characteristics:
- High melting point (3410°C)
- Low thermal expansion
- High electrical resistance
- Low vapor pressure
- Good thermal conductivity
- High density
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Mass Characteristics:
- Symbol: W
- Atomic Number: 74
- Atomic Weight: 183.85
- Density: 19.254 g/cc
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Thermal Properties:
- Melting Point: 3410°C (+ 20°C)
- Boiling Point: 5900°C
- Specific Heat: 0.14 kJ/kg x K at 20°C
- Latent Heat of Fusion: 209 kJ/kg (estimated)
- Thermal Conductivity: 129 W/m x K at 20°C
- Evaporation Heat: 444 J/g
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Electrical Properties:
- Electrical Resistivity: 5.5 μΩ/cm at 20°C
- Temperature Coefficient of the Electrical Resistivity: 0.00482 Ω/ΩK
- Temperature of Superconductivity: 0.016 K
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Mechanical Properties:
- A lot of factors such as micro structure, impurity contents in the tungsten, other alloying elements and heat treatment (for example annealing conditions) influence the mechanical properties of tungsten. By offering various tungsten alloys, XYXC could satisfy the specific needs from customers.
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Chemical Properties:
- Tungsten is resistant to corrosion when the humidity is below 60%. However, it must be protected at elevated temperatures. Tungsten can oxidize in the presence of oxidizing gases at temperatures above 250°C. Despite this vulnerability, Molten glass, nitrogen, inert gases, molten metals and ceramic oxides only slightly affect it.
