AWS BAg-4 vs. R30021 Cobalt
AWS BAg-4 belongs to the otherwise unclassified metals classification, while R30021 cobalt belongs to the cobalt alloys. There are 17 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.
For each property being compared, the top bar is AWS BAg-4 and the bottom bar is R30021 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 91 | |
| 220 |
| Poisson's Ratio | 0.33 | |
| 0.29 |
| Shear Modulus, GPa | 34 | |
| 86 |
| Tensile Strength: Ultimate (UTS), MPa | 150 | |
| 700 |
Thermal Properties
| Latent Heat of Fusion, J/g | 140 | |
| 330 |
| Melting Completion (Liquidus), °C | 780 | |
| 1350 |
| Melting Onset (Solidus), °C | 670 | |
| 1190 |
| Specific Heat Capacity, J/kg-K | 330 | |
| 450 |
| Thermal Expansion, µm/m-K | 21 | |
| 11 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.9 | |
| 8.4 |
| Embodied Carbon, kg CO2/kg material | 40 | |
| 8.0 |
| Embodied Energy, MJ/kg | 630 | |
| 110 |
Common Calculations
| Stiffness to Weight: Axial, points | 5.7 | |
| 15 |
| Stiffness to Weight: Bending, points | 17 | |
| 24 |
| Strength to Weight: Axial, points | 4.7 | |
| 23 |
| Strength to Weight: Bending, points | 7.1 | |
| 21 |
| Thermal Shock Resistance, points | 5.7 | |
| 21 |
Alloy Composition
| Carbon (C), % | 0 | |
| 0.2 to 0.35 |
| Chromium (Cr), % | 0 | |
| 26 to 29 |
| Cobalt (Co), % | 0 | |
| 61.7 to 67.3 |
| Copper (Cu), % | 29 to 31 | |
| 0 |
| Iron (Fe), % | 0 | |
| 0 to 3.0 |
| Molybdenum (Mo), % | 0 | |
| 4.5 to 6.0 |
| Nickel (Ni), % | 1.5 to 2.5 | |
| 2.0 to 3.0 |
| Silicon (Si), % | 0 | |
| 0 to 1.5 |
| Silver (Ag), % | 39 to 41 | |
| 0 |
| Zinc (Zn), % | 26 to 30 | |
| 0 |
| Residuals, % | 0 to 0.15 | |
| 0 |