MakeItFrom.com
Menu (ESC)

ASTM B631 Class B vs. R31539 Cobalt

ASTM B631 class B belongs to the otherwise unclassified metals classification, while R31539 cobalt belongs to the cobalt alloys. 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 ASTM B631 class B and the bottom bar is R31539 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Electrical Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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