R30075 Cobalt vs. AISI 304N Stainless Steel
R30075 cobalt belongs to the cobalt alloys classification, while AISI 304N stainless steel belongs to the iron alloys. They have a modest 21% of their average alloy composition in common, which, by itself, doesn't mean much. There are 27 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 R30075 cobalt and the bottom bar is AISI 304N stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 to 250 | |
| 200 |
| Elongation at Break, % | 12 | |
| 9.1 to 45 |
| Fatigue Strength, MPa | 250 to 840 | |
| 220 to 440 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 82 to 98 | |
| 77 |
| Tensile Strength: Ultimate (UTS), MPa | 780 to 1280 | |
| 620 to 1180 |
| Tensile Strength: Yield (Proof), MPa | 480 to 840 | |
| 270 to 850 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 290 |
| Melting Completion (Liquidus), °C | 1360 | |
| 1420 |
| Melting Onset (Solidus), °C | 1290 | |
| 1380 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 480 |
| Thermal Conductivity, W/m-K | 13 | |
| 16 |
| Thermal Expansion, µm/m-K | 12 | |
| 16 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.0 | |
| 2.4 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.1 | |
| 2.7 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.4 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 8.1 | |
| 3.0 |
| Embodied Energy, MJ/kg | 110 | |
| 43 |
| Embodied Water, L/kg | 530 | |
| 150 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 84 to 140 | |
| 98 to 280 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 560 to 1410 | |
| 180 to 1830 |
| Stiffness to Weight: Axial, points | 14 to 17 | |
| 14 |
| Stiffness to Weight: Bending, points | 24 to 25 | |
| 25 |
| Strength to Weight: Axial, points | 26 to 42 | |
| 22 to 42 |
| Strength to Weight: Bending, points | 22 to 31 | |
| 21 to 32 |
| Thermal Diffusivity, mm2/s | 3.5 | |
| 4.2 |
| Thermal Shock Resistance, points | 21 to 29 | |
| 14 to 26 |
Alloy Composition
| Aluminum (Al), % | 0 to 0.1 | |
| 0 |
| Boron (B), % | 0 to 0.010 | |
| 0 |
| Carbon (C), % | 0 to 0.35 | |
| 0 to 0.080 |
| Chromium (Cr), % | 27 to 30 | |
| 18 to 20 |
| Cobalt (Co), % | 58.7 to 68 | |
| 0 |
| Iron (Fe), % | 0 to 0.75 | |
| 66.4 to 73.9 |
| Manganese (Mn), % | 0 to 1.0 | |
| 0 to 2.0 |
| Molybdenum (Mo), % | 5.0 to 7.0 | |
| 0 |
| Nickel (Ni), % | 0 to 0.5 | |
| 8.0 to 10.5 |
| Nitrogen (N), % | 0 to 0.25 | |
| 0.1 to 0.16 |
| Phosphorus (P), % | 0 to 0.020 | |
| 0 to 0.045 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 0.75 |
| Sulfur (S), % | 0 to 0.010 | |
| 0 to 0.030 |
| Titanium (Ti), % | 0 to 0.1 | |
| 0 |
| Tungsten (W), % | 0 to 0.2 | |
| 0 |