EN 1.4123 Stainless Steel vs. R30008 Cobalt
EN 1.4123 stainless steel belongs to the iron alloys classification, while R30008 cobalt belongs to the cobalt alloys. They have a modest 32% of their average alloy composition in common, which, by itself, doesn't mean much. There are 19 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.
For each property being compared, the top bar is EN 1.4123 stainless steel and the bottom bar is R30008 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 210 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Shear Modulus, GPa | 77 | |
| 83 |
| Tensile Strength: Ultimate (UTS), MPa | 720 to 810 | |
| 950 to 1700 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 320 |
| Melting Completion (Liquidus), °C | 1450 | |
| 1400 |
| Melting Onset (Solidus), °C | 1410 | |
| 1330 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 450 |
| Thermal Expansion, µm/m-K | 10 | |
| 13 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 10 | |
| 95 |
| Density, g/cm3 | 7.7 | |
| 8.4 |
| Embodied Carbon, kg CO2/kg material | 4.2 | |
| 8.1 |
| Embodied Energy, MJ/kg | 62 | |
| 110 |
| Embodied Water, L/kg | 120 | |
| 400 |
Common Calculations
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 |
| Strength to Weight: Axial, points | 26 to 29 | |
| 31 to 56 |
| Strength to Weight: Bending, points | 23 to 25 | |
| 25 to 37 |
| Thermal Shock Resistance, points | 26 to 29 | |
| 25 to 44 |
Alloy Composition
| Boron (B), % | 0 | |
| 0 to 0.0010 |
| Carbon (C), % | 0.35 to 0.5 | |
| 0 to 0.15 |
| Chromium (Cr), % | 14 to 16.5 | |
| 18.5 to 21.5 |
| Cobalt (Co), % | 0 | |
| 39 to 42 |
| Iron (Fe), % | 76.7 to 84.6 | |
| 7.6 to 20 |
| Manganese (Mn), % | 0 to 1.0 | |
| 1.0 to 2.0 |
| Molybdenum (Mo), % | 1.0 to 2.5 | |
| 6.5 to 7.5 |
| Nickel (Ni), % | 0 to 0.5 | |
| 15 to 18 |
| Nitrogen (N), % | 0.1 to 0.3 | |
| 0 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.015 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 1.2 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.015 |
| Vanadium (V), % | 0 to 1.5 | |
| 0 |