R30003 Cobalt vs. EN 1.4123 Stainless Steel
R30003 cobalt belongs to the cobalt alloys classification, while EN 1.4123 stainless steel belongs to the iron alloys. They have a modest 34% of their average alloy composition in common, which, by itself, doesn't mean much. There are 23 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 1.4123 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 200 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 83 | |
| 77 |
| Tensile Strength: Ultimate (UTS), MPa | 970 to 1720 | |
| 720 to 810 |
Thermal Properties
| Latent Heat of Fusion, J/g | 310 | |
| 280 |
| Melting Completion (Liquidus), °C | 1400 | |
| 1450 |
| Melting Onset (Solidus), °C | 1440 | |
| 1410 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 480 |
| Thermal Conductivity, W/m-K | 13 | |
| 23 |
| Thermal Expansion, µm/m-K | 13 | |
| 10 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.0 | |
| 2.4 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.1 | |
| 2.8 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 95 | |
| 10 |
| Density, g/cm3 | 8.4 | |
| 7.7 |
| Embodied Carbon, kg CO2/kg material | 8.0 | |
| 4.2 |
| Embodied Energy, MJ/kg | 110 | |
| 62 |
| Embodied Water, L/kg | 400 | |
| 120 |
Common Calculations
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 24 | |
| 25 |
| Strength to Weight: Axial, points | 32 to 57 | |
| 26 to 29 |
| Strength to Weight: Bending, points | 26 to 38 | |
| 23 to 25 |
| Thermal Diffusivity, mm2/s | 3.3 | |
| 6.3 |
| Thermal Shock Resistance, points | 26 to 45 | |
| 26 to 29 |
Alloy Composition
| Boron (B), % | 0 to 0.1 | |
| 0 |
| Carbon (C), % | 0 to 0.15 | |
| 0.35 to 0.5 |
| Chromium (Cr), % | 19 to 21 | |
| 14 to 16.5 |
| Cobalt (Co), % | 39 to 41 | |
| 0 |
| Iron (Fe), % | 10 to 20.5 | |
| 76.7 to 84.6 |
| Manganese (Mn), % | 1.5 to 2.5 | |
| 0 to 1.0 |
| Molybdenum (Mo), % | 6.0 to 8.0 | |
| 1.0 to 2.5 |
| Nickel (Ni), % | 14 to 16 | |
| 0 to 0.5 |
| Nitrogen (N), % | 0 | |
| 0.1 to 0.3 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 1.2 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.030 |
| Vanadium (V), % | 0 | |
| 0 to 1.5 |