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R30816 Cobalt vs. ASTM B631 Class A

R30816 cobalt belongs to the cobalt alloys classification, while ASTM B631 class A belongs to the otherwise unclassified metals. There are 14 material properties with values for both materials. Properties with values for just one material (16, in this case) are not shown.

For each property being compared, the top bar is R30816 cobalt and the bottom bar is ASTM B631 class A.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
220
Poisson's Ratio 0.3
0.3
Shear Modulus, GPa 81
85 to 86

Thermal Properties

Latent Heat of Fusion, J/g 300
160
Melting Completion (Liquidus), °C 1540
2680 to 2690
Specific Heat Capacity, J/kg-K 420
160
Thermal Conductivity, W/m-K 13
420
Thermal Expansion, µm/m-K 12
11

Otherwise Unclassified Properties

Density, g/cm3 9.1
15
Embodied Carbon, kg CO2/kg material 20
43
Embodied Energy, MJ/kg 320
670

Common Calculations

Stiffness to Weight: Axial, points 13
8.5
Stiffness to Weight: Bending, points 22
14
Thermal Diffusivity, mm2/s 3.3
180