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    Rhenium
     Among the highest density element and melting point, rhenium does not have a ductile to brittle transition temperature and does not form carbides. High resistivity, combined with low vapor pressure, it is an ideal material for filament applications. Excellent resistance to corrosion, resists acid attack and the mechanical effects of electrical erosion. Rhenium has a beneficial effect as an alloying addition with other refractory metals as it greatly enhances the ductility and tensile strength of these alloys.Tungsten Rhenium and Molybdenum Rhenium alloys can be processed into plates, sheets, rods, wires, foil, and more.
    Rhenium Physical Properties
    Density lb/in3 0.77
      gm/cm3 21.2
    Melting Point °F 5767
      °C 3180
    Thermal Conductivity Cal/cm2/cm°C/sec 0.39
    Specific Heat Cal/gm/°C 0.033
    Coefficient of Linear Thermal Expansion micro-in/°F x 10-6 11.77
      micro-in/°C x 10-6 6.5
    Electrical Resistivity micro-ohm-cm 13.5
    Rhenium Mechanical Properties
    Tensile Strength KSI (Mpa)-RT 200 (1380)
      KSI (Mpa)-500°C 135 (930)
      KSI (Mpa)-1000°C 70 (480)
    Elongation % in 1.0". 2
    Hardness DPH --
    Modules of Elasticity KSI 67150
      Gpa 463
    Rhenium Chemistry
    Minimum % 99.97

    Application:

    Mass spectrometer filaments, grid heaters, cathode cups, thermocouples, nuclear reactors, semiconductors.

    Health effects of rhenium

    Little is known about rhenium toxicity.
    Potential health effects: May cause eye irritation. May cause skin irritation. Liquid may cause burns to skin and eyes. Ingestion: May cause irritation of the digestive tract. Inhalation: May cause respiratory tract irritation.
    The toxicological properties of this substance have not been fully investigated. Vapors may cause dizziness or suffocation.

    Environmental effects of rhenium

    There is so little rhenium in the environment that virtually nothing is known of how it would behave in soil, plants anr animals. There are no instances of pollution by rhenium salts from mining or industry. No information was found on the environmental toxicity of rhenium.
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