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R31537 Cobalt vs. AWS BCo-1

Both R31537 cobalt and AWS BCo-1 are cobalt alloys. They have 70% of their average alloy composition in common. There are 18 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is R31537 cobalt and the bottom bar is AWS BCo-1.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Poisson's Ratio 0.29
0.3
Shear Modulus, GPa 87
78
Tensile Strength: Ultimate (UTS), MPa 1000 to 1340
700

Thermal Properties

Latent Heat of Fusion, J/g 320
420
Melting Completion (Liquidus), °C 1360
1150
Melting Onset (Solidus), °C 1290
1120
Specific Heat Capacity, J/kg-K 450
480
Thermal Expansion, µm/m-K 13
12

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.1
Embodied Carbon, kg CO2/kg material 8.1
8.0
Embodied Energy, MJ/kg 110
110
Embodied Water, L/kg 530
430

Common Calculations

Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 33 to 44
24
Strength to Weight: Bending, points 26 to 32
22
Thermal Shock Resistance, points 24 to 32
21

Alloy Composition


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Aluminum (Al), % 0
0 to 0.050
Boron (B), % 0
0.7 to 0.9
Carbon (C), % 0 to 0.14
0.35 to 0.45
Chromium (Cr), % 26 to 30
18 to 20
Cobalt (Co), % 58.9 to 69
46 to 54
Iron (Fe), % 0 to 0.75
0 to 1.0
Manganese (Mn), % 0 to 1.0
0
Molybdenum (Mo), % 5.0 to 7.0
0
Nickel (Ni), % 0 to 1.0
16 to 18
Nitrogen (N), % 0 to 0.25
0
Phosphorus (P), % 0
0 to 0.020
Selenium (Se), % 0
0 to 0.0050
Silicon (Si), % 0 to 1.0
7.5 to 8.5
Sulfur (S), % 0
0 to 0.020
Titanium (Ti), % 0
0 to 0.050
Tungsten (W), % 0
3.5 to 4.5
Zirconium (Zr), % 0
0 to 0.050
Residuals, % 0
0 to 0.5