R30816 Cobalt vs. AISI 410 Stainless Steel
R30816 cobalt belongs to the cobalt alloys classification, while AISI 410 stainless steel belongs to the iron alloys. There are 27 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.
For each property being compared, the top bar is R30816 cobalt and the bottom bar is AISI 410 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 280 | |
| 190 to 240 |
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 190 |
| Elongation at Break, % | 23 | |
| 16 to 22 |
| Fatigue Strength, MPa | 250 | |
| 190 to 350 |
| Poisson's Ratio | 0.3 | |
| 0.28 |
| Reduction in Area, % | 22 | |
| 47 to 48 |
| Shear Modulus, GPa | 81 | |
| 76 |
| Tensile Strength: Ultimate (UTS), MPa | 1020 | |
| 520 to 770 |
| Tensile Strength: Yield (Proof), MPa | 460 | |
| 290 to 580 |
Thermal Properties
| Latent Heat of Fusion, J/g | 300 | |
| 270 |
| Melting Completion (Liquidus), °C | 1540 | |
| 1530 |
| Melting Onset (Solidus), °C | 1460 | |
| 1480 |
| Specific Heat Capacity, J/kg-K | 420 | |
| 480 |
| Thermal Conductivity, W/m-K | 13 | |
| 30 |
| Thermal Expansion, µm/m-K | 12 | |
| 11 |
Otherwise Unclassified Properties
| Density, g/cm3 | 9.1 | |
| 7.7 |
| Embodied Carbon, kg CO2/kg material | 20 | |
| 1.9 |
| Embodied Energy, MJ/kg | 320 | |
| 27 |
| Embodied Water, L/kg | 440 | |
| 100 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 190 | |
| 97 to 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 510 | |
| 210 to 860 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 22 | |
| 25 |
| Strength to Weight: Axial, points | 31 | |
| 19 to 28 |
| Strength to Weight: Bending, points | 25 | |
| 19 to 24 |
| Thermal Diffusivity, mm2/s | 3.3 | |
| 8.1 |
| Thermal Shock Resistance, points | 28 | |
| 18 to 26 |
Alloy Composition
| Carbon (C), % | 0.32 to 0.42 | |
| 0.080 to 0.15 |
| Chromium (Cr), % | 19 to 21 | |
| 11.5 to 13.5 |
| Cobalt (Co), % | 40 to 49.8 | |
| 0 |
| Iron (Fe), % | 0 to 5.0 | |
| 83.5 to 88.4 |
| Manganese (Mn), % | 1.0 to 2.0 | |
| 0 to 1.0 |
| Molybdenum (Mo), % | 3.5 to 4.5 | |
| 0 |
| Nickel (Ni), % | 19 to 21 | |
| 0 to 0.75 |
| Niobium (Nb), % | 3.5 to 4.5 | |
| 0 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.030 |
| Tantalum (Ta), % | 3.5 to 4.5 | |
| 0 |
| Tungsten (W), % | 3.5 to 4.5 | |
| 0 |