R30816 Cobalt vs. SAE-AISI 1552 Steel
R30816 cobalt belongs to the cobalt alloys classification, while SAE-AISI 1552 steel belongs to the iron alloys. There are 27 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.
For each property being compared, the top bar is R30816 cobalt and the bottom bar is SAE-AISI 1552 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 280 | |
| 220 to 250 |
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 190 |
| Elongation at Break, % | 23 | |
| 11 to 14 |
| Fatigue Strength, MPa | 250 | |
| 290 to 400 |
| Poisson's Ratio | 0.3 | |
| 0.29 |
| Reduction in Area, % | 22 | |
| 34 to 46 |
| Shear Modulus, GPa | 81 | |
| 72 |
| Tensile Strength: Ultimate (UTS), MPa | 1020 | |
| 760 to 840 |
| Tensile Strength: Yield (Proof), MPa | 460 | |
| 460 to 650 |
Thermal Properties
| Latent Heat of Fusion, J/g | 300 | |
| 250 |
| Melting Completion (Liquidus), °C | 1540 | |
| 1460 |
| Melting Onset (Solidus), °C | 1460 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 420 | |
| 470 |
| Thermal Conductivity, W/m-K | 13 | |
| 51 |
| Thermal Expansion, µm/m-K | 12 | |
| 11 |
Otherwise Unclassified Properties
| Density, g/cm3 | 9.1 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 20 | |
| 1.4 |
| Embodied Energy, MJ/kg | 320 | |
| 19 |
| Embodied Water, L/kg | 440 | |
| 47 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 190 | |
| 81 to 98 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 510 | |
| 560 to 1130 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 22 | |
| 24 |
| Strength to Weight: Axial, points | 31 | |
| 27 to 30 |
| Strength to Weight: Bending, points | 25 | |
| 24 to 25 |
| Thermal Diffusivity, mm2/s | 3.3 | |
| 14 |
| Thermal Shock Resistance, points | 28 | |
| 26 to 29 |
Alloy Composition
| Carbon (C), % | 0.32 to 0.42 | |
| 0.47 to 0.55 |
| Chromium (Cr), % | 19 to 21 | |
| 0 |
| Cobalt (Co), % | 40 to 49.8 | |
| 0 |
| Iron (Fe), % | 0 to 5.0 | |
| 97.9 to 98.3 |
| Manganese (Mn), % | 1.0 to 2.0 | |
| 1.2 to 1.5 |
| Molybdenum (Mo), % | 3.5 to 4.5 | |
| 0 |
| Nickel (Ni), % | 19 to 21 | |
| 0 |
| 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 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.050 |
| Tantalum (Ta), % | 3.5 to 4.5 | |
| 0 |
| Tungsten (W), % | 3.5 to 4.5 | |
| 0 |