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Refractory Metals

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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 PropertiesOriginal ValueComments
Density 19.3 g/cc
a Lattice Constant 3.165 Åbody-centered cubic
 
Chemical PropertiesOriginal ValueComments
Atomic Mass 183.841995
Atomic Number 74
Atomic Volume 1.59e-029m^3
Thermal Neutron Cross Section 19.2 barns/atom
X-ray Absorption Edge 0.17837 ÅK
 1.02497 ÅLI
 1.07436 ÅLII
 1.21529 ÅLIII
Electrode Potential 4.5 V
Electronegativity 1.7Pauling
Ionic Radius 0.620 ÅCrystal Ionic Radius for Valence +6
 0.700 ÅCrystal Ionic Radius for Valence +4
Electrochemical Equivalent 3.43 g/A/h
 
Mechanical PropertiesOriginal ValueComments
Hardness, Brinell 294Estimated from Vickers.
Hardness, Knoop 318Estimated from Vickers.
Hardness, Rockwell A 66Estimated from Vickers.
Hardness, Rockwell C 31Estimated from Vickers.
Hardness, Vickers 310
Tensile Strength 25.0 ksi
@Temperature 1650 °C
Tensile Strength, Ultimate 980 MPa
Tensile Strength, Yield 750 MPa
@Strain 0.2 %
Rupture Strength 47.0 MPa
@Temperature 1650 °C,
Time 36000 sec
Modulus of Elasticity 400 GPa
 300 GPa
@Temperature 1800 °C
 350 GPa
@Temperature 1200 °C
 370 GPa
@Temperature 800 °C
Poissons Ratio 0.28
Shear Modulus 156 GPaCalculated
Shear Strength 400 MPaAverage value for W blanks.
 
Electrical PropertiesOriginal ValueComments
Electrical Resistivity 0.00000565 ohm-cm
Magnetic Susceptibility 3.3e-7cgs/g
Critical Magnetic Field Strength, Oersted 1.12 - 1.18
Critical Superconducting Temperature 0.0149 - 0.0159 K
 
Thermal PropertiesOriginal ValueComments
Heat of Fusion 184.2 J/g
CTE, linear 4.40 µm/m-°C
@Temperature 20.0 - 100 °C
Specific Heat Capacity 0.134 J/g-°C
Thermal Conductivity 163.3 W/m-K
 117 W/m-K
@Temperature 1000 °C
 128 W/m-K
@Temperature 600 °C
 146 W/m-K
@Temperature 200 °C
Melting Point 3370 °C
Boiling Point 5900 °C
 
Optical PropertiesOriginal ValueComments
Emissivity (0-1) 0.15
@Temperature 100 °C
unoxidized, total
 
Component Elements PropertiesOriginal ValueComments
Tungsten, W 100 %
 
Descriptive Properties
CAS Number7440-33-7

References for this datasheet.

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