R30003 Cobalt vs. EN 1.5662 Steel
R30003 cobalt belongs to the cobalt alloys classification, while EN 1.5662 steel belongs to the iron alloys. They have a modest 25% of their average alloy composition in common, which, by itself, doesn't mean much. There are 25 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 R30003 cobalt and the bottom bar is EN 1.5662 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 190 |
| Elongation at Break, % | 10 to 73 | |
| 20 |
| Fatigue Strength, MPa | 320 to 560 | |
| 380 to 450 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 83 | |
| 73 |
| Tensile Strength: Ultimate (UTS), MPa | 970 to 1720 | |
| 740 to 750 |
| Tensile Strength: Yield (Proof), MPa | 510 to 1090 | |
| 550 to 660 |
Thermal Properties
| Latent Heat of Fusion, J/g | 310 | |
| 250 |
| Melting Completion (Liquidus), °C | 1400 | |
| 1460 |
| Melting Onset (Solidus), °C | 1440 | |
| 1410 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 470 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.0 | |
| 8.7 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.1 | |
| 9.8 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 95 | |
| 7.5 |
| Density, g/cm3 | 8.4 | |
| 8.0 |
| Embodied Carbon, kg CO2/kg material | 8.0 | |
| 2.3 |
| Embodied Energy, MJ/kg | 110 | |
| 31 |
| Embodied Water, L/kg | 400 | |
| 63 |
Common Calculations
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 600 to 2790 | |
| 810 to 1150 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 32 to 57 | |
| 26 |
| Strength to Weight: Bending, points | 26 to 38 | |
| 23 |
| Thermal Shock Resistance, points | 26 to 45 | |
| 22 |
Alloy Composition
| Boron (B), % | 0 to 0.1 | |
| 0 |
| Carbon (C), % | 0 to 0.15 | |
| 0 to 0.1 |
| Chromium (Cr), % | 19 to 21 | |
| 0 |
| Cobalt (Co), % | 39 to 41 | |
| 0 |
| Iron (Fe), % | 10 to 20.5 | |
| 88.6 to 91.2 |
| Manganese (Mn), % | 1.5 to 2.5 | |
| 0.3 to 0.8 |
| Molybdenum (Mo), % | 6.0 to 8.0 | |
| 0 to 0.1 |
| Nickel (Ni), % | 14 to 16 | |
| 8.5 to 10 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 to 0.020 |
| Silicon (Si), % | 0 to 1.2 | |
| 0 to 0.35 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.0050 |
| Vanadium (V), % | 0 | |
| 0 to 0.050 |