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Formula: Ta
Form: Nut
Material: Tantalum
CAS Number: 7440-25-7
Commodity: Metals
Standard: ISO 4032:2012
The Tantalum Nut is a product within Goodfellow's range of fasteners. It comes in 7 variations that differ in dimensions like thread, length, and diameter. Tantalum is chosen for its corrosion resistance, bio-compatibility, high strength, and conductivity. Tantalum Nuts find use in chemical processing equipment, medical implants, and high-temperature applications like aircraft and turbine engines where strength at extreme temperatures is needed. With its unique properties, the Tantalum Nut meets needs across scientific and industrial settings.
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Tolerances

Nut
Size See Item

Material Properties for Metals

Atomic Properties
Element Value
Atomic number 73
Crystal structure Body centred cubic
Electronic structure Xe 4f¹⁴ 5d³ 6s²
Valences shown 2,3,4,5
Atomic weight( amu ) 180.9479
Thermal neutron absorption cross-section( Barns ) 22
Photo-electric work function( eV ) 4.1
Natural isotope distribution( Mass No./% ) 180/ 0.012
Natural isotope distribution( Mass No./% ) 181/ 99.988
Atomic radius - Goldschmidt( nm ) 0.147
Ionisation potential( No./eV ) 1/ 7.88
Ionisation potential( No./eV ) 2/ 16.2
Mechanical Properties
Element Value
Material condition Hard
Material condition Soft
Poisson's ratio 0.342
Poisson's ratio 0.342
Bulk modulus( GPa ) 196.3
Bulk modulus( GPa ) 196.3
Tensile modulus( GPa ) 185.7
Tensile modulus( GPa ) 185.7
Hardness - Vickers( kgf mm⁻² ) 200
Hardness - Vickers( kgf mm⁻² ) 90
Tensile strength( MPa ) 760
Tensile strength( MPa ) 172-207
Yield strength( MPa ) 705
Yield strength( MPa ) 310-380
Electrical Properties
Element Value
Electrical resistivity( µOhmcm ) 13.5@20@20°C
Superconductivity critical temperature( K ) 4.47
Temperature coefficient( K⁻¹ ) 0.0035@0-100°C
Thermal emf against Pt (cold 0C - hot 100C)( mV ) 0.33
Physical Properties
Element Value
Boiling point( C ) 5425
Density( gcm⁻³ ) 16.6@20°C
Thermal Properties
Element Value
Melting point( C ) 2996
Latent heat of evaporation( J g⁻¹ ) 4165
Latent heat of fusion( J g⁻¹ ) 174
Specific heat( J K⁻¹ kg⁻¹ ) 140@25°C
Thermal conductivity( W m⁻¹ K⁻¹ ) 57.5@0-100
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 6.5@0-100°C

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