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Formula: Hf
Form: Rod
Material: Hafnium
CAS Number: 7440-58-6
Commodity: Metals
Temper:
As Drawn
Available in 28 variations, our Hafnium Rods offer a high-purity form of the transition metal hafnium. These rods are renowned for their exceptional properties. Noteworthy features include a high melting point, outstanding corrosion resistance and remarkable neutron absorption capabilities. These versatile properties position hafnium rods as integral components in various applications, including nuclear control rods, aerospace components and high-temperature furnace parts. Crafted with a uniform microstructure and precise dimensions, our Hafnium Rods are tailored for seamless integration into machining, fabrication or research applications that demand consistent and reliable performance.
Tolerances
Rod
| Diameter | =<10mm | ±10% |
|---|---|---|
| Diameter | >10mm | ±5% |
Material Properties for Metals
Atomic Properties
| Element | Value |
|---|---|
| Atomic number | 72 |
| Crystal structure | Hexagonal close packed |
| Electronic structure | Xe 4f¹⁴ 5d² 6s² |
| Valences shown | 4 |
| Atomic weight( amu ) | 178.49 |
| Thermal neutron absorption cross-section( Barns ) | 103 |
| Photo-electric work function( eV ) | 3.9 |
| Natural isotope distribution( Mass No./% ) | 179/ 13.8 |
| Natural isotope distribution( Mass No./% ) | 176/ 5.2 |
| Natural isotope distribution( Mass No./% ) | 180/ 35.2 |
| Natural isotope distribution( Mass No./% ) | 174/ 0.2 |
| Natural isotope distribution( Mass No./% ) | 177/ 18.5 |
| Natural isotope distribution( Mass No./% ) | 178/ 27.1 |
| Atomic radius - Goldschmidt( nm ) | 0.159 |
| Ionisation potential( No./eV ) | 3/ 23.3 |
| Ionisation potential( No./eV ) | 1/ 7.0 |
| Ionisation potential( No./eV ) | 2/ 14.9 |
| Ionisation potential( No./eV ) | 4/ 33.3 |
Mechanical Properties
| Element | Value |
|---|---|
| Material condition | Hard |
| Material condition | Soft |
| Poisson's ratio | 0.26 |
| Poisson's ratio | 0.26 |
| Bulk modulus( GPa ) | 109 |
| Bulk modulus( GPa ) | 109 |
| Tensile modulus( GPa ) | 141 |
| Tensile modulus( GPa ) | 141 |
| Hardness - Vickers( kgf mm⁻² ) | 150-180 |
| Tensile strength( MPa ) | 445 |
| Tensile strength( MPa ) | 745 |
| Yield strength( MPa ) | 365 |
| Yield strength( MPa ) | 240 |
Electrical Properties
| Element | Value |
|---|---|
| Electrical resistivity( µOhmcm ) | 32.2@20@20°C |
| Superconductivity critical temperature( K ) | 0.128 |
| Temperature coefficient( K⁻¹ ) | 0.0044@0-100°C |
Physical Properties
| Element | Value |
|---|---|
| Boiling point( C ) | 4602 |
| Density( gcm⁻³ ) | 13.1@20°C |
Thermal Properties
| Element | Value |
|---|---|
| Melting point( C ) | 2227 |
| Latent heat of evaporation( J g⁻¹ ) | 3700 |
| Latent heat of fusion( J g⁻¹ ) | 122 |
| Specific heat( J K⁻¹ kg⁻¹ ) | 146@25°C |
| Thermal conductivity( W m⁻¹ K⁻¹ ) | 23@0-100°C |
| Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) | 6@0-100°C |
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