No other common metal demonstrates better high-temperature behaviours than tungsten, which has a melting temperature above 3410°C. Tungsten resists gamma-ray radiation. Other than that, tungsten is also very hard and noncombustible. The most common grades are mixtures that contain more than 90% W + Ni/Fe, or Ni/Cu. Tungsten and its alloys are very heavy, which makes them suitable for constructing X-ray and gamma-ray shielding screens. Such materials are especially used to manufacture collimators or component containers like tungsten alloy vials, tungsten alloy syringe shields, tungsten alloy collimators, and tungsten alloy unit dose pigs.

Properties Of Tungsten Alloy

Alloy density: 17.6

Melting temperature: 3,410°C

Tensile strength: 1,180 MPa

Yield strength: 1,180 MPa

Elongation: 9%

Elastic modulus: 360,000 MPa

Shear modulus G: 145,000 MPa

Thermal conductivity: 80 W.m-1.K-1

Coefficient of linear thermal expansion: 5.5.10-6 K-1

Electrical resistivity: 0.15 μΩ.m

Brinell hardness: approximately 350