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R31539 Cobalt vs. ASTM B631 Class B

R31539 cobalt belongs to the cobalt alloys classification, while ASTM B631 class B belongs to the otherwise unclassified metals. There are 16 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.

For each property being compared, the top bar is R31539 cobalt and the bottom bar is ASTM B631 class B.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
210
Poisson's Ratio 0.29
0.31
Shear Modulus, GPa 86
78 to 79

Thermal Properties

Latent Heat of Fusion, J/g 320
150
Melting Completion (Liquidus), °C 1360
2460 to 2480
Specific Heat Capacity, J/kg-K 450
170
Thermal Conductivity, W/m-K 13
450
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
50 to 53
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
32 to 34

Otherwise Unclassified Properties

Density, g/cm3 8.4
14
Embodied Carbon, kg CO2/kg material 8.2
49
Embodied Energy, MJ/kg 110
760

Common Calculations

Stiffness to Weight: Axial, points 15
8.1
Stiffness to Weight: Bending, points 24
14
Thermal Diffusivity, mm2/s 3.5
190