EN 1.4307 Stainless Steel vs. R30016 Cobalt
EN 1.4307 stainless steel belongs to the iron alloys classification, while R30016 cobalt belongs to the cobalt alloys. They have a modest 23% of their average alloy composition in common, which, by itself, doesn't mean much. There are 28 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 EN 1.4307 stainless steel and the bottom bar is R30016 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 220 |
| Elongation at Break, % | 14 to 46 | |
| 8.4 |
| Fatigue Strength, MPa | 190 to 320 | |
| 290 |
| Impact Strength: V-Notched Charpy, J | 91 to 94 | |
| 8.0 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 77 | |
| 85 |
| Tensile Strength: Ultimate (UTS), MPa | 590 to 900 | |
| 1010 |
| Tensile Strength: Yield (Proof), MPa | 200 to 570 | |
| 580 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 320 |
| Melting Completion (Liquidus), °C | 1430 | |
| 1360 |
| Melting Onset (Solidus), °C | 1380 | |
| 1270 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 450 |
| Thermal Conductivity, W/m-K | 15 | |
| 15 |
| Thermal Expansion, µm/m-K | 16 | |
| 14 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.4 | |
| 1.9 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.7 | |
| 2.0 |
Otherwise Unclassified Properties
| Density, g/cm3 | 7.8 | |
| 8.5 |
| Embodied Carbon, kg CO2/kg material | 3.0 | |
| 7.7 |
| Embodied Energy, MJ/kg | 43 | |
| 110 |
| Embodied Water, L/kg | 140 | |
| 500 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 110 to 210 | |
| 72 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 100 to 810 | |
| 770 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 |
| Strength to Weight: Axial, points | 21 to 32 | |
| 33 |
| Strength to Weight: Bending, points | 20 to 27 | |
| 26 |
| Thermal Diffusivity, mm2/s | 4.0 | |
| 3.9 |
| Thermal Shock Resistance, points | 13 to 20 | |
| 24 |
Alloy Composition
| Carbon (C), % | 0 to 0.030 | |
| 0.9 to 1.4 |
| Chromium (Cr), % | 17.5 to 19.5 | |
| 28 to 32 |
| Cobalt (Co), % | 0 | |
| 49.6 to 66.9 |
| Iron (Fe), % | 66.8 to 74.5 | |
| 0 to 3.0 |
| Manganese (Mn), % | 0 to 2.0 | |
| 0.5 to 2.0 |
| Molybdenum (Mo), % | 0 | |
| 0 to 1.5 |
| Nickel (Ni), % | 8.0 to 10.5 | |
| 0 to 3.0 |
| Nitrogen (N), % | 0 to 0.1 | |
| 0 |
| Phosphorus (P), % | 0 to 0.045 | |
| 0 |
| Silicon (Si), % | 0 to 1.0 | |
| 0.2 to 2.0 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 |
| Tungsten (W), % | 0 | |
| 3.5 to 5.5 |