R30035 Cobalt vs. EN 1.4740 Stainless Steel
R30035 cobalt belongs to the cobalt alloys classification, while EN 1.4740 stainless steel belongs to the iron alloys. There are 20 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.
For each property being compared, the top bar is R30035 cobalt and the bottom bar is EN 1.4740 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 220 to 230 | |
| 200 |
| Elongation at Break, % | 9.0 to 46 | |
| 22 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 84 to 89 | |
| 77 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 300 |
| Melting Completion (Liquidus), °C | 1440 | |
| 1420 |
| Melting Onset (Solidus), °C | 1320 | |
| 1370 |
| Specific Heat Capacity, J/kg-K | 440 | |
| 490 |
| Thermal Conductivity, W/m-K | 11 | |
| 18 |
| Thermal Expansion, µm/m-K | 13 | |
| 10 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 1.7 | |
| 2.2 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 1.8 | |
| 2.6 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 100 | |
| 9.5 |
| Density, g/cm3 | 8.7 | |
| 7.6 |
| Embodied Carbon, kg CO2/kg material | 10 | |
| 2.3 |
| Embodied Energy, MJ/kg | 140 | |
| 32 |
| Embodied Water, L/kg | 410 | |
| 120 |
Common Calculations
| Stiffness to Weight: Axial, points | 14 to 15 | |
| 14 |
| Stiffness to Weight: Bending, points | 23 to 24 | |
| 25 |
| Thermal Diffusivity, mm2/s | 3.0 | |
| 4.8 |
Alloy Composition
| Boron (B), % | 0 to 0.015 | |
| 0 |
| Carbon (C), % | 0 to 0.025 | |
| 0.3 to 0.5 |
| Chromium (Cr), % | 19 to 21 | |
| 16 to 19 |
| Cobalt (Co), % | 29.1 to 39 | |
| 0 |
| Iron (Fe), % | 0 to 1.0 | |
| 75.4 to 82.7 |
| Manganese (Mn), % | 0 to 0.15 | |
| 0 to 1.0 |
| Molybdenum (Mo), % | 9.0 to 10.5 | |
| 0 to 0.5 |
| Nickel (Ni), % | 33 to 37 | |
| 0 to 1.0 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 0.15 | |
| 1.0 to 2.5 |
| Sulfur (S), % | 0 to 0.010 | |
| 0 to 0.030 |
| Titanium (Ti), % | 0 to 1.0 | |
| 0 |