R31538 Cobalt vs. AWS BCo-1
Both R31538 cobalt and AWS BCo-1 are cobalt alloys. They have 71% 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 R31538 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 | 86 | |
78 |
Tensile Strength: Ultimate (UTS), MPa | 1020 to 1360 | |
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 | 34 to 45 | |
24 |
Strength to Weight: Bending, points | 27 to 32 | |
22 |
Thermal Shock Resistance, points | 25 to 33 | |
21 |
Alloy Composition
Aluminum (Al), % | 0 | |
0 to 0.050 |
Boron (B), % | 0 | |
0.7 to 0.9 |
Carbon (C), % | 0.15 to 0.35 | |
0.35 to 0.45 |
Chromium (Cr), % | 26 to 30 | |
18 to 20 |
Cobalt (Co), % | 58.7 to 68.9 | |
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 |