Tungsten (wolfram) has the highest melting point (3,422 °C) and the lowest thermal expansion of all metals, together with high density (19.3 g/cm³), very high mechanical hardness and very low vapour pressure. These properties make it irreplaceable in many industries.
From HC Starck’s wide range, Galtek Kimya supplies high-quality tungsten powders from 0.4 µm to over 50 µm.
W
- Melting point
- 3,422 °C
- Density
- 19.3 g/cm³
- Grain size
- 0.4 µm – >50 µm
Properties
Tungsten heavy alloys draw on the metal’s high density, mechanical damping, strong absorption of ionising radiation and easy machining. They serve as balance weights and damping elements in aircraft, engines and power units, and as flywheel masses and centrifugal weights in machinery. In medical technology, X-ray and measuring equipment they shield and focus ionising radiation.
High thermal resistance with excellent thermal and good electrical conductivity makes tungsten-copper alloys suitable for high-performance switching contacts, heat sinks and discharge electrodes. Pure tungsten is used as crucible material and sputtering targets in the coating industry, and as heating elements and heat shields in high-temperature furnaces.
Product types
- HC
- Conventional high-purity tungsten metal powder in a wide range of grain sizes
- HC S
- Tungsten metal powder with a very narrow grain size distribution
- D
- Lightly agglomerated tungsten metal powder with excellent cold-pressing properties
- GG
- Special coarse tungsten metal powder with very low oxygen and excellent infiltration properties
- HC 4000
- Standard coarse-grain tungsten metal powder
Applications
- Oil and gas exploration
- Tungsten powder for drill bit shoulders; shaped charges
- Heavy alloys (W-Ni-Fe, W-Ni-Cu)
- Counterweights and anti-vibration parts in aircraft and rotors; X-ray and radiation shielding
- Semi-finished products
- Filaments, electrodes, contact material (W-Cu)
- Superalloys
- Alloying element in superalloys; sputtering targets