R30816 Cobalt vs. EN 1.4923 Stainless Steel
R30816 cobalt belongs to the cobalt alloys classification, while EN 1.4923 stainless steel belongs to the iron alloys. There are 26 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.
For each property being compared, the top bar is R30816 cobalt and the bottom bar is EN 1.4923 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 190 |
| Elongation at Break, % | 23 | |
| 12 to 21 |
| Fatigue Strength, MPa | 250 | |
| 300 to 440 |
| Poisson's Ratio | 0.3 | |
| 0.28 |
| Reduction in Area, % | 22 | |
| 40 to 46 |
| Shear Modulus, GPa | 81 | |
| 76 |
| Tensile Strength: Ultimate (UTS), MPa | 1020 | |
| 870 to 980 |
| Tensile Strength: Yield (Proof), MPa | 460 | |
| 470 to 780 |
Thermal Properties
| Latent Heat of Fusion, J/g | 300 | |
| 270 |
| Melting Completion (Liquidus), °C | 1540 | |
| 1450 |
| Melting Onset (Solidus), °C | 1460 | |
| 1410 |
| Specific Heat Capacity, J/kg-K | 420 | |
| 480 |
| Thermal Conductivity, W/m-K | 13 | |
| 24 |
| Thermal Expansion, µm/m-K | 12 | |
| 11 |
Otherwise Unclassified Properties
| Density, g/cm3 | 9.1 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 20 | |
| 2.9 |
| Embodied Energy, MJ/kg | 320 | |
| 41 |
| Embodied Water, L/kg | 440 | |
| 100 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 190 | |
| 110 to 150 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 510 | |
| 570 to 1580 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 22 | |
| 25 |
| Strength to Weight: Axial, points | 31 | |
| 31 to 35 |
| Strength to Weight: Bending, points | 25 | |
| 26 to 28 |
| Thermal Diffusivity, mm2/s | 3.3 | |
| 6.5 |
| Thermal Shock Resistance, points | 28 | |
| 30 to 34 |
Alloy Composition
| Carbon (C), % | 0.32 to 0.42 | |
| 0.18 to 0.24 |
| Chromium (Cr), % | 19 to 21 | |
| 11 to 12.5 |
| Cobalt (Co), % | 40 to 49.8 | |
| 0 |
| Iron (Fe), % | 0 to 5.0 | |
| 83.5 to 87.1 |
| Manganese (Mn), % | 1.0 to 2.0 | |
| 0.4 to 0.9 |
| Molybdenum (Mo), % | 3.5 to 4.5 | |
| 0.8 to 1.2 |
| Nickel (Ni), % | 19 to 21 | |
| 0.3 to 0.8 |
| Niobium (Nb), % | 3.5 to 4.5 | |
| 0 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.025 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 0.5 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.015 |
| Tantalum (Ta), % | 3.5 to 4.5 | |
| 0 |
| Tungsten (W), % | 3.5 to 4.5 | |
| 0 |
| Vanadium (V), % | 0 | |
| 0.25 to 0.35 |