Chemical Properties of Tungsten

• Electrochemical Equivalent: 1.1432g/amp-hr
• Electron Work Function: 4.55eV
• Electronegativity: 2.36 (Pauling); 1.4 (Allrod Rochow)
• Heat of Fusion: 35.4kJ/mol
• Incompatibilities:

  Bromine trifluoride, chlorine trifluoride, fluorine, iodine pentafluoride

• Ionization Potential
  • First: 7.98
• Valence Electron Potential (-eV): 140

Physical Properties of Tungsten

• Atomic Mass Average: 183.85
• Boiling Point: 5928K 5655°C 10211°F
• Coefficient of lineal thermal expansion/K^-1: 4.59E^-6
• Conductivity

  Electrical: 0.189 10⁶/cm
  Thermal: 1.74 W/cmK

• Density: 19.35g/cc @ 300K
• Description:

  Hard, silver-white metal that is generally obtained as a dull grey powder that is hard to melt.

• Elastic Modulus:
  • Bulk: 311/GPa
  • Rigidity: 160.5/GPa
  • Youngs: 411/GPa
• Enthalpy of Atomization: 837 kJ/mole @ 25°C
• Enthalpy of Fusion: 35.23 kJ/mole
• Enthalpy of Vaporization: 799.1 kJ/mole
• Flammablity Class: Combustible
• Freezing Point: see melting point
• Hardness Scale
  • Brinell: 2570 MN m^-2
  • Mohs: 7.5
  • Vickers: 3430 MN m^-2
• Heat of Vaporization: 824kJ/mol
• Melting Point: 3680K 3407°C 6165°F
  
• Molar Volume: 9.5 cm³/mole
• Optical Reflectivity: 62%
• Physical State (at 20°C & 1atm): Solid
• Specific Heat: 0.13J/gK
• Vapor Pressure = 4.27Pa@3407°C

Regulatory / Health

• CAS Number
  • 7440-33-7
• RTECS: Y07175000
• OSHA Permissible Exposure Limit (PEL)
  • No limits set by OSHA
• OSHA PEL Vacated 1989
  • TWA: 5 mg/m³
  • STEL: 10 mg/m³
• NIOSH Recommended Exposure Limit

  Back  [1] [2] [3] Next

  
  

  If you need any more details of the above news and/or products, please visit Chinatungsten Online, or contact us directly.
  Disclaimer: The article is only reflecting the opinions of the author. We have no responsibility to prove the originality and authenticity of the content, words and/or pictures. You readers should just take it as reference and check the details by yourselves. And the content is not a suggestion for investment decision. The investor takes his or her own risks if he or she operates accordingly. If you have any dissent about the contents above, please contact the relevant author, or the webmaster. We will try our best to assist the dealing of the related issues. Thanks for your visit and cooperation.