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Formula: Ta
Form: Ball/Sphere
Material: Tantalum
CAS Number: 7440-25-7
Commodity: Metals
Purity: 99.9%
Diameter: 1mm
Type: Precision Sphere
Tantalum Balls offered by Goodfellow, are available in 4 variations. Tantalum is known for its corrosion resistance and bio-compatibility. Tantalum Balls are commonly used in prosthetics due to tantalum's ability to osseointegrate with bone. They are also utilized in chemical processing equipment because of tantalum's immunity to practically all organic and inorganic chemicals at room temperature.
Technical Data Sheet Safety Data Sheet Tolerance Properties
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Tolerances

Ball/Sphere
Diameter Standard ±5%
Diameter Precision 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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