EN 1.4378 Stainless Steel vs. R30075 Cobalt
EN 1.4378 stainless steel belongs to the iron alloys classification, while R30075 cobalt belongs to the cobalt alloys. There are 23 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.
For each property being compared, the top bar is EN 1.4378 stainless steel and the bottom bar is R30075 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 210 to 250 |
| Elongation at Break, % | 14 to 34 | |
| 12 |
| Fatigue Strength, MPa | 340 to 550 | |
| 250 to 840 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Shear Modulus, GPa | 77 | |
| 82 to 98 |
| Tensile Strength: Ultimate (UTS), MPa | 760 to 1130 | |
| 780 to 1280 |
| Tensile Strength: Yield (Proof), MPa | 430 to 970 | |
| 480 to 840 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 320 |
| Melting Completion (Liquidus), °C | 1390 | |
| 1360 |
| Melting Onset (Solidus), °C | 1350 | |
| 1290 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 450 |
| Thermal Expansion, µm/m-K | 17 | |
| 12 |
Otherwise Unclassified Properties
| Density, g/cm3 | 7.6 | |
| 8.4 |
| Embodied Carbon, kg CO2/kg material | 2.7 | |
| 8.1 |
| Embodied Energy, MJ/kg | 39 | |
| 110 |
| Embodied Water, L/kg | 150 | |
| 530 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 150 to 220 | |
| 84 to 140 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 470 to 2370 | |
| 560 to 1410 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 to 17 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 to 25 |
| Strength to Weight: Axial, points | 28 to 41 | |
| 26 to 42 |
| Strength to Weight: Bending, points | 24 to 31 | |
| 22 to 31 |
| Thermal Shock Resistance, points | 16 to 23 | |
| 21 to 29 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 0 to 0.1 |
| Boron (B), % | 0 | |
| 0 to 0.010 |
| Carbon (C), % | 0 to 0.080 | |
| 0 to 0.35 |
| Chromium (Cr), % | 17 to 19 | |
| 27 to 30 |
| Cobalt (Co), % | 0 | |
| 58.7 to 68 |
| Iron (Fe), % | 61.2 to 69 | |
| 0 to 0.75 |
| Manganese (Mn), % | 11.5 to 14.5 | |
| 0 to 1.0 |
| Molybdenum (Mo), % | 0 | |
| 5.0 to 7.0 |
| Nickel (Ni), % | 2.3 to 3.7 | |
| 0 to 0.5 |
| Nitrogen (N), % | 0.2 to 0.4 | |
| 0 to 0.25 |
| Phosphorus (P), % | 0 to 0.060 | |
| 0 to 0.020 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.010 |
| Titanium (Ti), % | 0 | |
| 0 to 0.1 |
| Tungsten (W), % | 0 | |
| 0 to 0.2 |