R30155 Cobalt vs. AWS ER90S-B3
Both R30155 cobalt and AWS ER90S-B3 are iron alloys. They have a modest 35% of their average alloy composition in common, which, by itself, doesn't mean much. There are 26 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.
For each property being compared, the top bar is R30155 cobalt and the bottom bar is AWS ER90S-B3.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 190 |
| Elongation at Break, % | 34 | |
| 19 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 81 | |
| 73 |
| Tensile Strength: Ultimate (UTS), MPa | 850 | |
| 690 |
| Tensile Strength: Yield (Proof), MPa | 390 | |
| 620 |
Thermal Properties
| Latent Heat of Fusion, J/g | 300 | |
| 260 |
| Melting Completion (Liquidus), °C | 1470 | |
| 1460 |
| Melting Onset (Solidus), °C | 1420 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 470 |
| Thermal Conductivity, W/m-K | 12 | |
| 40 |
| Thermal Expansion, µm/m-K | 14 | |
| 13 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 80 | |
| 4.1 |
| Density, g/cm3 | 8.5 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 9.7 | |
| 1.8 |
| Embodied Energy, MJ/kg | 150 | |
| 24 |
| Embodied Water, L/kg | 300 | |
| 60 |
Common Calculations
| PREN (Pitting Resistance) | 37 | |
| 6.0 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 230 | |
| 130 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 370 | |
| 1000 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 23 | |
| 24 |
| Strength to Weight: Axial, points | 28 | |
| 25 |
| Strength to Weight: Bending, points | 24 | |
| 22 |
| Thermal Diffusivity, mm2/s | 3.2 | |
| 11 |
| Thermal Shock Resistance, points | 21 | |
| 20 |
Alloy Composition
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| Carbon (C), % | 0.080 to 0.16 | |
| 0.070 to 0.12 |
| Chromium (Cr), % | 20 to 22.5 | |
| 2.3 to 2.7 |
| Cobalt (Co), % | 18.5 to 21 | |
| 0 |
| Copper (Cu), % | 0 | |
| 0 to 0.35 |
| Iron (Fe), % | 24.3 to 36.2 | |
| 93.5 to 95.9 |
| Manganese (Mn), % | 1.0 to 2.0 | |
| 0.4 to 0.7 |
| Molybdenum (Mo), % | 2.5 to 3.5 | |
| 0.9 to 1.2 |
| Nickel (Ni), % | 19 to 21 | |
| 0 to 0.2 |
| Niobium (Nb), % | 0.75 to 1.3 | |
| 0 |
| Nitrogen (N), % | 0 to 0.2 | |
| 0 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.025 |
| Silicon (Si), % | 0 to 1.0 | |
| 0.4 to 0.7 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.025 |
| Tantalum (Ta), % | 0.75 to 1.3 | |
| 0 |
| Tungsten (W), % | 2.0 to 3.0 | |
| 0 |
| Residuals, % | 0 | |
| 0 to 0.5 |