Annealed R30008 Cobalt vs. Annealed Type 4 Magnetic Alloy
Annealed R30008 cobalt belongs to the cobalt alloys classification, while annealed Type 4 magnetic alloy belongs to the nickel alloys. They have a modest 36% of their average alloy composition in common, which, by itself, doesn't mean much. There are 23 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.
For each property being compared, the top bar is annealed R30008 cobalt and the bottom bar is annealed Type 4 magnetic alloy.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 190 |
| Elongation at Break, % | 73 | |
| 40 |
| Fatigue Strength, MPa | 320 | |
| 220 |
| Poisson's Ratio | 0.29 | |
| 0.31 |
| Shear Modulus, GPa | 83 | |
| 73 |
| Tensile Strength: Ultimate (UTS), MPa | 950 | |
| 620 |
| Tensile Strength: Yield (Proof), MPa | 500 | |
| 270 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 290 |
| Melting Completion (Liquidus), °C | 1400 | |
| 1420 |
| Melting Onset (Solidus), °C | 1330 | |
| 1370 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 440 |
| Thermal Expansion, µm/m-K | 13 | |
| 11 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 95 | |
| 60 |
| Density, g/cm3 | 8.4 | |
| 8.8 |
| Embodied Carbon, kg CO2/kg material | 8.1 | |
| 10 |
| Embodied Energy, MJ/kg | 110 | |
| 140 |
| Embodied Water, L/kg | 400 | |
| 210 |
Common Calculations
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 590 | |
| 190 |
| Stiffness to Weight: Axial, points | 14 | |
| 12 |
| Stiffness to Weight: Bending, points | 24 | |
| 22 |
| Strength to Weight: Axial, points | 31 | |
| 19 |
| Strength to Weight: Bending, points | 25 | |
| 18 |
| Thermal Shock Resistance, points | 25 | |
| 21 |
Alloy Composition
| Boron (B), % | 0 to 0.0010 | |
| 0 |
| Carbon (C), % | 0 to 0.15 | |
| 0 to 0.050 |
| Chromium (Cr), % | 18.5 to 21.5 | |
| 0 to 0.3 |
| Cobalt (Co), % | 39 to 42 | |
| 0 to 0.5 |
| Copper (Cu), % | 0 | |
| 0 to 0.3 |
| Iron (Fe), % | 7.6 to 20 | |
| 9.5 to 17.5 |
| Manganese (Mn), % | 1.0 to 2.0 | |
| 0 to 0.8 |
| Molybdenum (Mo), % | 6.5 to 7.5 | |
| 3.5 to 6.0 |
| Nickel (Ni), % | 15 to 18 | |
| 79 to 82 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 to 0.010 |
| Silicon (Si), % | 0 to 1.2 | |
| 0 to 0.5 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.020 |