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Cobalt, Co

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Subcategory: Metal; Nonferrous Metal; Pure Element

Component   Wt. %
Co100 

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Physical PropertiesMetricEnglishComments
Density8.8 g/cc0.318 lb/in³ 

Mechanical Properties
Hardness, Brinell125125 
Hardness, Vickers253253 
Tensile Strength, Yield225 MPa32600 psi 
Modulus of Elasticity211 GPa30600 ksi 
Poisson's Ratio0.320.32 
Shear Modulus82.6 GPa12000 ksi 

Electrical Properties
Electrical Resistivity6.24e-006 ohm-cm6.24e-006 ohm-cm 
Magnetic PermeabilityMax 245Max 245 
Magnetic Permeability6868 Initial
Curie Temperature1121 °C2050 °F 

Thermal Properties
Heat of Fusion259.6 J/g112 BTU/lb 
CTE, linear 20°C12.5 µm/m-°C6.94 µin/in-°F over the range 20-100ºC
CTE, linear 250°C14.2 µm/m-°C7.89 µin/in-°F at 200°C
Specific Heat Capacity0.44 J/g-°C0.105 BTU/lb-°F 
Thermal Conductivity69.21 W/m-K480 BTU-in/hr-ft²-°F 
Melting Point1493 °C2720 °F 

Optical Properties
Emissivity (0-1)0.130.13 500°C unoxidized, total spectrum
Reflection Coefficient, Visible (0-1)0.370.37 200 nm
Reflection Coefficient, Visible (0-1)0.6750.675 1060 nm

Descriptive Properties
CAS Number7440-48-4 
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References for this datasheet.


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