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With a melting point higher than 3,410°C, tungsten has the best temperature behaviour of all common metals.
It is also noncombustible and offers very high mechanical characteristics.
The most common grades are alloys at >90%W + Ni/Fe or Ni/Cu.
Thanks to their extremely high densities, tungsten and tungsten alloys are suitable for X-ray and gamma ray shielding screens.
They are used in particular in the manufacture of collimator or container components.
Tungsten has excellent resistance to gamma radiation.
However,under neutron flux, it produces capture gamma rays, with energies between 1 and 7 MeV and is strongly activated.