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Formula: Pb
Form: Disk
Material: Lead
CAS Number: 7439-92-1
Commodity: Metals
Hazard Pictogram: GHS08
Goodfellow supplies lead disks with a maximum purity of 99.999% (5N), catering to specialized applications that require its unique properties. Lead is known for its high density, malleability, and excellent radiation shielding capabilities. While its use is restricted in many consumer products due to toxicity concerns, it remains crucial in certain industries and research fields. Lead is extensively used in radiation shielding for medical and nuclear applications, in the production of lead-acid batteries, and in some specialized alloys. In research, high-purity lead is essential for studying superconductivity, particularly in the development of superconducting magnets. Its role in particle physics experiments and as a target material in nuclear research highlights its ongoing importance in scientific advancement. The continued use of lead in these critical applications underscores its value in both fundamental research and specialized industrial processes.
Technical Data Sheet Safety Data Sheet Tolerance Properties

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Tolerances

Disk
Thickness >0.05mm ±10%
Thickness <0.01mm ±25%
Thickness 0.01mm - 0.05mm ±15%

Material Properties for Metals

Atomic Properties
Element Value
Atomic number 82
Crystal structure Face centred cubic
Electronic structure Xe 4f¹⁴ 5d¹⁰ 6s² 6p²
Valences shown 2, 4
Atomic weight( amu ) 207.2
Thermal neutron absorption cross-section( Barns ) 0.18
Photo-electric work function( eV ) 4
Natural isotope distribution( Mass No./% ) 207/ 22.1
Natural isotope distribution( Mass No./% ) 208/ 52.4
Natural isotope distribution( Mass No./% ) 206/ 24.1
Natural isotope distribution( Mass No./% ) 204/ 1.4
Atomic radius - Goldschmidt( nm ) 0.175
Ionisation potential( No./eV ) 5/ 68.8
Ionisation potential( No./eV ) 3/ 31.9
Ionisation potential( No./eV ) 4/ 42.3
Ionisation potential( No./eV ) 2/ 15.03
Ionisation potential( No./eV ) 1/ 7.42
Mechanical Properties
Element Value
Hardness - Mohs 1.5
Material condition Polycrystalline
Material condition Sand cast
Poisson's ratio 0.44
Poisson's ratio 0.44
Bulk modulus( GPa ) 45.8
Bulk modulus( GPa ) 45.8
Tensile modulus( GPa ) 16.1
Tensile modulus( GPa ) 16.1
Tensile strength( MPa ) 12
Yield strength( MPa ) 5.5
Electrical Properties
Element Value
Electrical resistivity( µOhmcm ) 20.6@20@20°C
Superconductivity critical temperature( K ) 7.196
Temperature coefficient( K⁻¹ ) 0.0042@0-100°C
Thermal emf against Pt (cold 0C - hot 100C)( mV ) 0.44
Physical Properties
Element Value
Boiling point( C ) 1740
Density( gcm⁻³ ) 11.35@20
Thermal Properties
Element Value
Melting point( C ) 327.5
Latent heat of evaporation( J g⁻¹ ) 862
Latent heat of fusion( J g⁻¹ ) 23.2
Specific heat( J K⁻¹ kg⁻¹ ) 159@25°C
Thermal conductivity( W m⁻¹ K⁻¹ ) 35.3@0-100°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 29@0-100°C

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