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Cobalt Disk
Available Configurations
Properties common to all products in this list
| Purity | Thickness | Diameter | Temper ⓘ |
|---|---|---|---|
| 99.8% (2N8) and 99.99% (4N) | 0.003mm to 0.5mm | 4mm to 50.8mm | As rolled Annealed |
Need custom configurations? Please contact us.
Health hazard/Hazardous to the ozone layer
Serious health hazard
Key Features
Cobalt Disk at 99.8–99.99% purity is a precision-machined circular component valued for its high strength, excellent corrosion resistance, and ferromagnetic stability that persists at elevated temperatures — supporting use in demanding environments requiring both durability and functional magnetic or mechanical performance:
Highest Curie Point of Any Elemental Metal (≈1121 °C)
Cobalt retains ferromagnetism up to approximately 1121 °C — the highest Curie point of any elemental metal — making Cobalt Disk uniquely suited to magnetic storage system components, precision sensor assemblies, and high-temperature magnetic applications where ferromagnetic behavior must persist well beyond the temperature limits of iron or nickel.
High Tensile Strength (Up to 1135 MPa) & Vickers Hardness Up to 320 kgf/mm²
With a tensile strength up to 1135 MPa in the hard condition and Vickers hardness up to 320 kgf/mm², Cobalt Disk retains structural integrity under mechanical load where many comparable metals would soften — supporting its use in high-performance turbine components and precision sensor assemblies subject to sustained mechanical stress.
High Melting Point (1495 °C) for Sustained High-Temperature Service
A melting point of 1495 °C ensures Cobalt Disk retains structural integrity and magnetic stability in high-temperature aerospace and energy system applications, where many comparable metals would soften or lose magnetic stability before reaching cobalt's operating temperature limits.
Biocompatibility & Wear Resistance for Orthopedic & Dental Implant Use
Cobalt's biocompatibility and wear resistance support its use in orthopedic and dental implant applications, where long-term contact with biological tissue must be combined with resistance to mechanical wear under repeated loading — a combination that also extends to stable electrode performance valuable in electrochemical device development.
Research Platform for Microstructure & Alloy Composition Optimization
In research, Cobalt Disk is used to optimize microstructure, surface finishing, and alloy composition for improved fatigue resistance, corrosion behavior, and mechanical stability — providing a precision circular specimen geometry for systematic investigation across advanced industrial and scientific applications.
Industrial Applications
Cobalt Disk is used across magnetic technology, biomedical implants, aerospace and energy turbine components, electrochemical devices, and materials research wherever high strength, magnetic stability at elevated temperature, and biocompatibility must be combined in a precision circular form:
- ✦ Magnetic Storage System Components
- Used in magnetic storage system components, where cobalt's ferromagnetic stability up to its Curie point of approximately 1121 °C — the highest of any elemental metal — provides reliable magnetic performance in storage media and magnetic recording components operating under thermal conditions that would degrade the magnetic stability of iron- or nickel-based alternatives.
- ✦ Precision Sensor Assemblies
- Applied in precision sensor assemblies, where cobalt's combination of high tensile strength, Vickers hardness up to 320 kgf/mm², and ferromagnetic stability at elevated temperature supports reliable magnetic and mechanical sensor performance in demanding industrial and aerospace measurement environments.
- ✦ Biomedical Implants — Orthopedic & Dental
- Used in orthopedic and dental implant applications, where cobalt's biocompatibility and wear resistance support long-term performance in load-bearing implant components subject to repeated mechanical stress and sustained contact with biological tissue.
- ✦ High-Performance Turbine Components in Aerospace & Energy Systems
- Employed in high-performance turbine components for aerospace and energy systems, where a melting point of 1495 °C and tensile strength up to 1135 MPa in the hard condition provide the high-temperature mechanical performance required in turbine environments that exceed the service limits of many comparable structural metals.
- ✦ Microstructure, Surface Finishing & Alloy Composition Research
- Used in research to optimize microstructure, surface finishing, and alloy composition for improved fatigue resistance, corrosion behavior, and mechanical stability — with the precision circular disk geometry providing a standardized specimen form for systematic materials development across advanced industrial and scientific applications.
Material Properties
| Element | Value |
|---|---|
| Atomic number | 27 |
| Crystal structure | Hexagonal close packed |
| Electronic structure | Ar 3d⁷ 4s² |
| Valences shown | 2, 3 |
| Atomic weight( amu ) | 58.9332 |
| Thermal neutron absorption cross-section( Barns ) | 37.5 |
| Photo-electric work function( eV ) | 5 |
| Atomic radius - Goldschmidt( nm ) | 0.125 |
| Ionisation potential( No./eV ) | 2/ 17.06 |
| Ionisation potential( No./eV ) | 4/ 51.3 |
| Ionisation potential( No./eV ) | 3/ 33.5 |
| Ionisation potential( No./eV ) | 1/ 79.5 |
| Ionisation potential( No./eV ) | 1/ 79.5 |
| Ionisation potential( No./eV ) | 6/ 102 |
| Element | Value |
|---|---|
| Material condition | Hard |
| Material condition | Soft |
| Poisson's ratio | 0.32 |
| Poisson's ratio | 0.32 |
| Bulk modulus( GPa ) | 181.5 |
| Bulk modulus( GPa ) | 181.5 |
| Tensile modulus( GPa ) | 211 |
| Tensile modulus( GPa ) | 211 |
| Hardness - Vickers( kgf mm⁻² ) | 320 |
| Hardness - Vickers( kgf mm⁻² ) | 170 |
| Tensile strength( MPa ) | 1135 |
| Tensile strength( MPa ) | 760 |
| Yield strength( MPa ) | 345-485 |
| Element | Value |
|---|---|
| Electrical resistivity( µOhmcm ) | 6.34@20°C |
| Temperature coefficient( K⁻¹ ) | 0.0066@0-100°C |
| Thermal emf against Pt (cold 0C - hot 100C)( mV ) | -1.33 |
| Element | Value |
|---|---|
| Boiling point( C ) | 2870 |
| Density( gcm⁻³ ) | 8.9@20°C |
| Element | Value |
|---|---|
| Melting point( C ) | 1495 |
| Latent heat of evaporation( J g⁻¹ ) | 6490 |
| Latent heat of fusion( J g⁻¹ ) | 263 |
| Specific heat( J K⁻¹ kg⁻¹ ) | 456@25°C |
| Thermal conductivity( W m⁻¹ K⁻¹ ) | 100@0-100°C |
| Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) | 12.5@0-100°C |
Tolerances
| Thickness | <0.01mm | ±25% |
|---|---|---|
| Thickness | 0.01mm - 0.05mm | ±15% |
| Thickness | >0.05mm | ±10% |
| Diameter | ±0.5mm |