Tungsten, W
Categories: Metal; Nonferrous Metal; Refractory Metal; Tungsten Alloy; Pure Element

Material Notes: Tungsten is a very dense, hard, temperature/corrosion-resistant metal. It is expensive so finds niche rather than large scale structural applications. Some example uses are rocket nozzles, nuclear and medical radiation shielding for x-ray and radiation therapy shields and industrial applications, aircraft and helicopter rotor balance weights, instrument balance weights, weights for sport equipment, tool damping cutter bars, and high voltage contacts.

Key Words: Wolfram, W
Vendors: Eagle Alloys Corporation is a leading supplier of quality metals and alloys. Our staff prides itself on working fast, efficiently and courteously to get you the information you need. Call (800) 237-9012 or visit www.EagleAlloys.com.

Elmet Technologies is a 100% US owned and operated, fully integrated manufacturer of Molybdenum, Tungsten and related alloys such as TZM, WHA & MoLa. At our 220,000 sqr/ft plant in Lewiston, Maine, Elmet manufactures W & Mo pure powders plus rod, wire, plate, sheet & foil in additional to offering fabrication and machining services. ITAR, ISO and AS9100 registered. www.elmettechnologies.com

PLANSEE SE: Whether it's high temperatures, aggressive chemicals or extreme mechanical loading: PLANSEE supplies a suitable product solution in refractory metals or composite materials. As the world market leader in powder metallurgically produced high performance materials we combine outstanding materials knowledge with profound applications and technology know-how. Visit us at www.plansee.com.

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Physical PropertiesMetricEnglishComments
Density 19.3 g/cc0.697 lb/in³
a Lattice Constant 3.165 Å3.165 Åbody-centered cubic
Chemical PropertiesMetricEnglishComments
Atomic Mass 183.84183.841995
Atomic Number 7474
Atomic Volume 1.59e-0291.59e-029m^3
Thermal Neutron Cross Section 19.2 barns/atom19.2 barns/atom
X-ray Absorption Edge 0.17837 Å0.17837 ÅK
 1.02497 Å1.02497 ÅLI
 1.07436 Å1.07436 ÅLII
 1.21529 Å1.21529 ÅLIII
Electrode Potential 4.5 V4.5 V
Electronegativity 1.71.7Pauling
Ionic Radius 0.620 Å0.620 ÅCrystal Ionic Radius for Valence +6
 0.700 Å0.700 ÅCrystal Ionic Radius for Valence +4
Electrochemical Equivalent 3.43 g/A/h3.43 g/A/h
Mechanical PropertiesMetricEnglishComments
Hardness, Brinell 294294Estimated from Vickers.
Hardness, Knoop 318318Estimated from Vickers.
Hardness, Rockwell A 6666Estimated from Vickers.
Hardness, Rockwell C 3131Estimated from Vickers.
Hardness, Vickers 310310
Tensile Strength 172 MPa
@Temperature 1650 °C
25000 psi
@Temperature 3000 °F
Tensile Strength, Ultimate 980 MPa142000 psi
Tensile Strength, Yield 750 MPa
@Strain 0.2 %
109000 psi
@Strain 0.2 %
Rupture Strength 47.0 MPa
@Temperature 1650 °C,
Time 36000 sec
6820 psi
@Temperature 3000 °F,
Time 10.0 hour
Modulus of Elasticity 400 GPa58000 ksi
 300 GPa
@Temperature 1800 °C
43500 ksi
@Temperature 3270 °F
 350 GPa
@Temperature 1200 °C
50800 ksi
@Temperature 2190 °F
 370 GPa
@Temperature 800 °C
53700 ksi
@Temperature 1470 °F
Poissons Ratio 0.280.28
Shear Modulus 156 GPa22600 ksiCalculated
Shear Strength 400 MPa58000 psiAverage value for W blanks.
Electrical PropertiesMetricEnglishComments
Electrical Resistivity 0.00000565 ohm-cm0.00000565 ohm-cm
Magnetic Susceptibility 3.3e-73.3e-7cgs/g
Critical Magnetic Field Strength, Oersted 1.12 - 1.181.12 - 1.18
Critical Superconducting Temperature 0.0149 - 0.0159 K0.0149 - 0.0159 K
Thermal PropertiesMetricEnglishComments
Heat of Fusion 184.2 J/g79.24 BTU/lb
CTE, linear 4.40 µm/m-°C
@Temperature 20.0 - 100 °C
2.44 µin/in-°F
@Temperature 68.0 - 212 °F
Specific Heat Capacity 0.134 J/g-°C0.0320 BTU/lb-°F
Thermal Conductivity 163.3 W/m-K1133 BTU-in/hr-ft²-°F
 117 W/m-K
@Temperature 1000 °C
812 BTU-in/hr-ft²-°F
@Temperature 1830 °F
 128 W/m-K
@Temperature 600 °C
888 BTU-in/hr-ft²-°F
@Temperature 1110 °F
 146 W/m-K
@Temperature 200 °C
1010 BTU-in/hr-ft²-°F
@Temperature 392 °F
Melting Point 3370 °C6100 °F
Boiling Point 5900 °C10700 °F
Optical PropertiesMetricEnglishComments
Emissivity (0-1) 0.15
@Temperature 100 °C
@Temperature 212 °F
unoxidized, total
Component Elements PropertiesMetricEnglishComments
Tungsten, W 100 %100 %
Descriptive Properties
CAS Number7440-33-7

References for this datasheet.

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