EN 1.4612 Stainless Steel vs. R30008 Cobalt
EN 1.4612 stainless steel belongs to the iron alloys classification, while R30008 cobalt belongs to the cobalt alloys. They have a modest 38% of their average alloy composition in common, which, by itself, doesn't mean much. There are 22 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.
For each property being compared, the top bar is EN 1.4612 stainless steel and the bottom bar is R30008 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 210 |
| Elongation at Break, % | 11 | |
| 1.1 to 73 |
| Fatigue Strength, MPa | 860 to 950 | |
| 320 to 530 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Shear Modulus, GPa | 76 | |
| 83 |
| Tensile Strength: Ultimate (UTS), MPa | 1690 to 1850 | |
| 950 to 1700 |
| Tensile Strength: Yield (Proof), MPa | 1570 to 1730 | |
| 500 to 1080 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 320 |
| Melting Completion (Liquidus), °C | 1450 | |
| 1400 |
| Melting Onset (Solidus), °C | 1400 | |
| 1330 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 450 |
| Thermal Expansion, µm/m-K | 11 | |
| 13 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 16 | |
| 95 |
| Density, g/cm3 | 7.9 | |
| 8.4 |
| Embodied Carbon, kg CO2/kg material | 3.6 | |
| 8.1 |
| Embodied Energy, MJ/kg | 50 | |
| 110 |
| Embodied Water, L/kg | 140 | |
| 400 |
Common Calculations
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 |
| Strength to Weight: Axial, points | 60 to 65 | |
| 31 to 56 |
| Strength to Weight: Bending, points | 40 to 43 | |
| 25 to 37 |
| Thermal Shock Resistance, points | 58 to 63 | |
| 25 to 44 |
Alloy Composition
| Aluminum (Al), % | 1.4 to 1.8 | |
| 0 |
| Boron (B), % | 0 | |
| 0 to 0.0010 |
| Carbon (C), % | 0 to 0.015 | |
| 0 to 0.15 |
| Chromium (Cr), % | 11 to 12.5 | |
| 18.5 to 21.5 |
| Cobalt (Co), % | 0 | |
| 39 to 42 |
| Iron (Fe), % | 71.5 to 75.5 | |
| 7.6 to 20 |
| Manganese (Mn), % | 0 to 0.1 | |
| 1.0 to 2.0 |
| Molybdenum (Mo), % | 1.8 to 2.3 | |
| 6.5 to 7.5 |
| Nickel (Ni), % | 10.2 to 11.3 | |
| 15 to 18 |
| Nitrogen (N), % | 0 to 0.010 | |
| 0 |
| Phosphorus (P), % | 0 to 0.010 | |
| 0 to 0.015 |
| Silicon (Si), % | 0 to 0.1 | |
| 0 to 1.2 |
| Sulfur (S), % | 0 to 0.0050 | |
| 0 to 0.015 |
| Titanium (Ti), % | 0.2 to 0.5 | |
| 0 |