R30816 Cobalt vs. EN 1.4612 Stainless Steel
R30816 cobalt belongs to the cobalt alloys classification, while EN 1.4612 stainless steel belongs to the iron alloys. They have a modest 27% of their average alloy composition in common, which, by itself, doesn't mean much. There are 22 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 R30816 cobalt and the bottom bar is EN 1.4612 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 190 |
| Elongation at Break, % | 23 | |
| 11 |
| Fatigue Strength, MPa | 250 | |
| 860 to 950 |
| Poisson's Ratio | 0.3 | |
| 0.28 |
| Shear Modulus, GPa | 81 | |
| 76 |
| Tensile Strength: Ultimate (UTS), MPa | 1020 | |
| 1690 to 1850 |
| Tensile Strength: Yield (Proof), MPa | 460 | |
| 1570 to 1730 |
Thermal Properties
| Latent Heat of Fusion, J/g | 300 | |
| 280 |
| Melting Completion (Liquidus), °C | 1540 | |
| 1450 |
| Melting Onset (Solidus), °C | 1460 | |
| 1400 |
| Specific Heat Capacity, J/kg-K | 420 | |
| 480 |
| Thermal Expansion, µm/m-K | 12 | |
| 11 |
Otherwise Unclassified Properties
| Density, g/cm3 | 9.1 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 20 | |
| 3.6 |
| Embodied Energy, MJ/kg | 320 | |
| 50 |
| Embodied Water, L/kg | 440 | |
| 140 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 190 | |
| 190 to 210 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 22 | |
| 25 |
| Strength to Weight: Axial, points | 31 | |
| 60 to 65 |
| Strength to Weight: Bending, points | 25 | |
| 40 to 43 |
| Thermal Shock Resistance, points | 28 | |
| 58 to 63 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 1.4 to 1.8 |
| Carbon (C), % | 0.32 to 0.42 | |
| 0 to 0.015 |
| Chromium (Cr), % | 19 to 21 | |
| 11 to 12.5 |
| Cobalt (Co), % | 40 to 49.8 | |
| 0 |
| Iron (Fe), % | 0 to 5.0 | |
| 71.5 to 75.5 |
| Manganese (Mn), % | 1.0 to 2.0 | |
| 0 to 0.1 |
| Molybdenum (Mo), % | 3.5 to 4.5 | |
| 1.8 to 2.3 |
| Nickel (Ni), % | 19 to 21 | |
| 10.2 to 11.3 |
| Niobium (Nb), % | 3.5 to 4.5 | |
| 0 |
| Nitrogen (N), % | 0 | |
| 0 to 0.010 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.010 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 0.1 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.0050 |
| Tantalum (Ta), % | 3.5 to 4.5 | |
| 0 |
| Titanium (Ti), % | 0 | |
| 0.2 to 0.5 |
| Tungsten (W), % | 3.5 to 4.5 | |
| 0 |