Tungsten is a refractory metal, a group that includes niobium, tantalum, molybdenum and rhenium, so-called because of their high melting temperatures and low vapor pressures. It is produced exclusively as a metal powder which is then solidified by sintering and/or melting. Tungsten is used, in wire form, extensively for lighting, electronic devices, and thermocouples. It’s high melting point makes it especially well-suited for structural applications exposed to very high temperatures.



Physical Properties:

Crystal Structure: Body-centered cubic (α phase)

Atomic Weight: 183.85

Density: 19.254 g/cm3

Thermal Properties:

Boiling Point: 5900 oC (range of 5700 oC + 200 oC)

Melting Point: 3410 oC (+ 20 oC)

Thermal Conductivity (20 oC): 129 W/m ⋅K

Evaporation Heat: 444 J/g

Heat of Fusion: 209 J/g

Specific Heat: 0.14 J/g ⋅K

Electrical Properties:

Electrical Resistivity (20 oC): 5.5 µΩ/cm

Temperature Coefficient of the Electrical Resistivity: 482 ⋅10-5 Ω/ΩK

Temperature of Superconductivity: 0.016 K

Mechanical Properties:

Tensile Strength (20 oC):     Sheet Thickness         psi

                                              0.5 - 1.0 mm          >188,500

                                              1.0 - 5.0 mm          >116,000

Compressive Strength (20 oC): 166,753 psi

Modulus of Elasticity (20 oC): 59,450 ⋅103 psi

Transition Temperature (Brittle/Ductile): 100 oC - 400 oC

Home Page Content Under Periodic Table


Click on the Alloy to go to the Online Catalog page.


Welcome to

ESPI was incorporated in 1950 with a mission to provide a competitive source for high purity metals, metal compounds and alloys. We are a valuable resource for virtually all major universities worldwide, global corporate R&D laboratories, thousands of domestic and international manufacturing companies and all U.S. government research laboratories. ESPI offers unique advantages often unavailable from larger organizations with no minimum order size & all business hour calls are handled by a competent sales representative. Automated answering systems and voice mail are not an option at ESPI.

Located within our fabrication facility is the melting department, forging & shaping areas, and the rod & wire, and sheet & foil departments providing the following manufacturing capabilities:

  • Casting of pure metals and alloys
  • Vacuum arc melting
  • Induction melting
  • Rod and wire drawing/extrusion
  • Sheet, foil and ribbon rolling
  • CNC milling and machining

Tel: 541-488-8311 - Email: sales@espimetals.com - or click the "Live Help/Chat Now" icon, upper right.



ESPI produces and sells 68 elements and dozens of alloys in various forms for your custom needs. Click on the forms below to be directed to detailed information on manufacturing.



At We Keep Good Company

Aerospace and Defense
Northrop Grumman, Hewlett Packard, IBM, Lockheed-Martin, Hughes, Boeing, General Dynamics, Aerojet, Litton, General Electric

Medical Instruments & Technology
Cintron, Hologic/Lorad, Varian, Siemens Medical, St Jude Medical, ArthroCare, GE Medical, Harvard Medical School, City of Hope Medical Center, American Medical Systems, Cedars Sinai Medical Center

Atomic Energy of Canada, CNRS, European Synchrotron Radiation Facility, INRS, Alberta Research Council, National Research Council of Canada, UNAM, CISRO, CERN

Stanford, UCLA, Harvard, Georgia Institute of Technology, Caltech, Johns Hopkins University, University of Arizonia, Penn State, University of Michigan, Princeton, Yale, University of Wollongong, University of Tokoyo, University of Toronto, Tulane, University of New South Wales, Max-Planck Institute, University of Freiburg

Government Research Labs
JPL, Los Alamos National Lab, Battelle Pacific NW National Lab, US Department of Energy, Argonne National Lab, Brookhaven National Lab, Naval Oceans Systems Center, US Air Force, Lawrence Berkeley National Lab, NASA

Green Energy
Origin Energy Solar, First Solar, Schott Solar, SunPower Corporation, Nanosolar, Inc.