MatWeb, The Online Materials Database

Cobalt, Co

Subcategory: Metal; Nonferrous Metal; Pure Element

Component    Wt. % Co 100

Physical Properties	Original Value		Comments
Density	8.8 g/cc
Mechanical Properties
Hardness, Brinell	125
Hardness, Vickers	253
Tensile Strength, Yield	225 MPa
Modulus of Elasticity	211 GPa
Poisson's Ratio	0.32
Shear Modulus	82.6 GPa
Electrical Properties
Electrical Resistivity	6.24e-006 ohm-cm
Magnetic Permeability	Max 245
Magnetic Permeability	68		Initial
Curie Temperature	1121 °C
Thermal Properties
Heat of Fusion	259.6 J/g
CTE, linear 20°C	12.5 µm/m-°C		over the range 20-100ºC
CTE, linear 250°C	14.2 µm/m-°C		at 200°C
Specific Heat Capacity	0.44 J/g-°C
Thermal Conductivity	69.21 W/m-K
Melting Point	1493 °C
Optical Properties
Emissivity (0-1)	0.13		500°C unoxidized, total spectrum
Reflection Coefficient, Visible (0-1)	0.37		200 nm
Reflection Coefficient, Visible (0-1)	0.675		1060 nm
Descriptive Properties
CAS Number	7440-48-4

References are available for this material.