R30816 Cobalt vs. EN 1.4903 Stainless Steel
R30816 cobalt belongs to the cobalt alloys classification, while EN 1.4903 stainless steel belongs to the iron alloys. There are 25 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.
For each property being compared, the top bar is R30816 cobalt and the bottom bar is EN 1.4903 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 190 |
| Elongation at Break, % | 23 | |
| 20 to 21 |
| Fatigue Strength, MPa | 250 | |
| 320 to 330 |
| Poisson's Ratio | 0.3 | |
| 0.28 |
| Shear Modulus, GPa | 81 | |
| 75 |
| Tensile Strength: Ultimate (UTS), MPa | 1020 | |
| 670 to 680 |
| Tensile Strength: Yield (Proof), MPa | 460 | |
| 500 |
Thermal Properties
| Latent Heat of Fusion, J/g | 300 | |
| 270 |
| Melting Completion (Liquidus), °C | 1540 | |
| 1460 |
| Melting Onset (Solidus), °C | 1460 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 420 | |
| 470 |
| Thermal Conductivity, W/m-K | 13 | |
| 26 |
| Thermal Expansion, µm/m-K | 12 | |
| 11 |
Otherwise Unclassified Properties
| Density, g/cm3 | 9.1 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 20 | |
| 2.6 |
| Embodied Energy, MJ/kg | 320 | |
| 36 |
| Embodied Water, L/kg | 440 | |
| 88 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 190 | |
| 120 to 130 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 510 | |
| 650 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 22 | |
| 25 |
| Strength to Weight: Axial, points | 31 | |
| 24 |
| Strength to Weight: Bending, points | 25 | |
| 22 |
| Thermal Diffusivity, mm2/s | 3.3 | |
| 7.0 |
| Thermal Shock Resistance, points | 28 | |
| 23 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 0 to 0.040 |
| Carbon (C), % | 0.32 to 0.42 | |
| 0.080 to 0.12 |
| Chromium (Cr), % | 19 to 21 | |
| 8.0 to 9.5 |
| Cobalt (Co), % | 40 to 49.8 | |
| 0 |
| Copper (Cu), % | 0 | |
| 0 to 0.3 |
| Iron (Fe), % | 0 to 5.0 | |
| 87.1 to 90.5 |
| Manganese (Mn), % | 1.0 to 2.0 | |
| 0.3 to 0.6 |
| Molybdenum (Mo), % | 3.5 to 4.5 | |
| 0.85 to 1.1 |
| Nickel (Ni), % | 19 to 21 | |
| 0 to 0.4 |
| Niobium (Nb), % | 3.5 to 4.5 | |
| 0.060 to 0.1 |
| Nitrogen (N), % | 0 | |
| 0.030 to 0.070 |
| 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 | |
| 0.18 to 0.25 |