R30816 Cobalt vs. EN 1.4935 Stainless Steel
R30816 cobalt belongs to the cobalt alloys classification, while EN 1.4935 stainless steel belongs to the iron alloys. There are 25 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 1.4935 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 200 |
| Elongation at Break, % | 23 | |
| 16 to 18 |
| Fatigue Strength, MPa | 250 | |
| 350 to 400 |
| Poisson's Ratio | 0.3 | |
| 0.28 |
| Shear Modulus, GPa | 81 | |
| 76 |
| Tensile Strength: Ultimate (UTS), MPa | 1020 | |
| 780 to 880 |
| Tensile Strength: Yield (Proof), MPa | 460 | |
| 570 to 670 |
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 | |
| 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 | |
| 42 |
| Embodied Water, L/kg | 440 | |
| 100 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 190 | |
| 130 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 510 | |
| 830 to 1160 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 22 | |
| 25 |
| Strength to Weight: Axial, points | 31 | |
| 28 to 31 |
| Strength to Weight: Bending, points | 25 | |
| 24 to 26 |
| Thermal Diffusivity, mm2/s | 3.3 | |
| 6.5 |
| Thermal Shock Resistance, points | 28 | |
| 27 to 30 |
Alloy Composition
| Carbon (C), % | 0.32 to 0.42 | |
| 0.17 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 to 86.7 |
| Manganese (Mn), % | 1.0 to 2.0 | |
| 0.3 to 0.8 |
| 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 | |
| 0.1 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 | |
| 0.4 to 0.6 |
| Vanadium (V), % | 0 | |
| 0.2 to 0.35 |