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Formula: Pd
Form: Tube
Material: Palladium
CAS Number: 7440-05-3
Commodity: Precious Metals
Purity: 99.95%
Wall Thickness: 0.5mm
Inside Diameter: 5mm
Outside Diameter: 6mm
Temper: As Drawn

Palladium Half-round Closed At One End Tube

Palladium Half Round Closed at One End Tube combines the noble metal’s corrosion resistance, hydrogen permeability, and catalytic properties in a form ideal for controlled fluid containment and reactive environments. The closed-end design enables applications in hydrogen purification, catalytic reactors, and sealed probe housings. Industries such as chemical processing, energy, and analytical instrumentation employ these tubes in selective hydrogen separation systems, chemical sampling devices, and catalyst-based reaction chambers. Specific uses include hydrogen isotope separation, precision gas delivery systems, and reaction vessel inserts. In research, they are used to study gas diffusion kinetics, catalytic surface interactions, and membrane reactor efficiency. The integration of geometry and functional properties makes this form of palladium highly valuable in specialized engineering and advanced laboratory applications.
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Tolerances

Tube
Outside Diameter =<2mm ±0.05mm
Outside Diameter 2mm - 5mm ±0.1mm
Outside Diameter >5mm ±5%
Wall Thickness ±10%

Material Properties for Precious Metals

Atomic Properties
Element Value
Atomic number 46
Crystal structure Face centred cubic
Electronic structure Kr 4d¹⁰
Valences shown 2, 3, 4
Atomic weight( amu ) 106.42
Thermal neutron absorption cross-section( Barns ) 6
Photo-electric work function( eV ) 5
Natural isotope distribution( Mass No./% ) 108/ 26.7
Natural isotope distribution( Mass No./% ) 110/ 11.8
Natural isotope distribution( Mass No./% ) 104/ 11.0
Natural isotope distribution( Mass No./% ) 102/ 1.0
Natural isotope distribution( Mass No./% ) 105/ 22.2
Natural isotope distribution( Mass No./% ) 106/ 27.3
Atomic radius - Goldschmidt( nm ) 0.137
Ionisation potential( No./eV ) 1/ 8.3
Ionisation potential( No./eV ) 2/ 19.4
Ionisation potential( No./eV ) 3/ 32.9
Mechanical Properties
Element Value
Material condition Soft
Material condition Hard
Poisson's ratio 0.39
Poisson's ratio 0.39
Bulk modulus( GPa ) 187
Bulk modulus( GPa ) 187
Tensile modulus( GPa ) 121
Tensile modulus( GPa ) 121
Hardness - Vickers( kgf mm⁻² ) 40
Hardness - Vickers( kgf mm⁻² ) 100
Tensile strength( MPa ) 140-195
Tensile strength( MPa ) 325
Yield strength( MPa ) 205
Yield strength( MPa ) 34.5
Electrical Properties
Element Value
Electrical resistivity( µOhmcm ) 10.8@20@20
Temperature coefficient( K⁻¹ ) 0.0042@0-100
Thermal emf against Pt (cold 0C - hot 100C)( mV ) -0.57
Physical Properties
Element Value
Boiling point( C ) 3140
Density( gcm⁻³ ) 12@20°C
Thermal Properties
Element Value
Melting point( C ) 1554
Latent heat of evaporation( J g⁻¹ ) 3398
Latent heat of fusion( J g⁻¹ ) 157
Specific heat( J K⁻¹ kg⁻¹ ) 244@25
Thermal conductivity( W m⁻¹ K⁻¹ ) 71.8@0-100°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 11@0-100

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