AWS BCo-1 vs. AWS ER90S-B9
AWS BCo-1 belongs to the cobalt alloys classification, while AWS ER90S-B9 belongs to the iron alloys. There are 18 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.
For each property being compared, the top bar is AWS BCo-1 and the bottom bar is AWS ER90S-B9.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 190 |
| Poisson's Ratio | 0.3 | |
| 0.28 |
| Shear Modulus, GPa | 78 | |
| 75 |
| Tensile Strength: Ultimate (UTS), MPa | 700 | |
| 690 |
Thermal Properties
| Latent Heat of Fusion, J/g | 420 | |
| 270 |
| Melting Completion (Liquidus), °C | 1150 | |
| 1450 |
| Melting Onset (Solidus), °C | 1120 | |
| 1410 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 470 |
| Thermal Expansion, µm/m-K | 12 | |
| 13 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.1 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 8.0 | |
| 2.6 |
| Embodied Energy, MJ/kg | 110 | |
| 37 |
| Embodied Water, L/kg | 430 | |
| 91 |
Common Calculations
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 24 | |
| 25 |
| Strength to Weight: Axial, points | 24 | |
| 25 |
| Strength to Weight: Bending, points | 22 | |
| 22 |
| Thermal Shock Resistance, points | 21 | |
| 19 |
Alloy Composition
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| Aluminum (Al), % | 0 to 0.050 | |
| 0 to 0.040 |
| Boron (B), % | 0.7 to 0.9 | |
| 0 |
| Carbon (C), % | 0.35 to 0.45 | |
| 0.070 to 0.13 |
| Chromium (Cr), % | 18 to 20 | |
| 8.0 to 10.5 |
| Cobalt (Co), % | 46 to 54 | |
| 0 |
| Copper (Cu), % | 0 | |
| 0 to 0.2 |
| Iron (Fe), % | 0 to 1.0 | |
| 84.4 to 90.7 |
| Manganese (Mn), % | 0 | |
| 0 to 1.2 |
| Molybdenum (Mo), % | 0 | |
| 0.85 to 1.2 |
| Nickel (Ni), % | 16 to 18 | |
| 0 to 0.8 |
| Niobium (Nb), % | 0 | |
| 0.020 to 0.1 |
| Nitrogen (N), % | 0 | |
| 0.030 to 0.070 |
| Phosphorus (P), % | 0 to 0.020 | |
| 0 to 0.010 |
| Selenium (Se), % | 0 to 0.0050 | |
| 0 |
| Silicon (Si), % | 7.5 to 8.5 | |
| 0.15 to 0.5 |
| Sulfur (S), % | 0 to 0.020 | |
| 0 to 0.010 |
| Titanium (Ti), % | 0 to 0.050 | |
| 0 |
| Tungsten (W), % | 3.5 to 4.5 | |
| 0 |
| Vanadium (V), % | 0 | |
| 0.15 to 0.3 |
| Zirconium (Zr), % | 0 to 0.050 | |
| 0 |
| Residuals, % | 0 to 0.5 | |
| 0 to 0.5 |