R30035 Cobalt vs. Type 4 Magnetic Alloy
R30035 cobalt belongs to the cobalt alloys classification, while Type 4 magnetic alloy belongs to the nickel alloys. They have 41% of their average alloy composition in common. There are 26 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 R30035 cobalt and the bottom bar is Type 4 magnetic alloy.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 220 to 230 | |
| 190 |
| Elongation at Break, % | 9.0 to 46 | |
| 2.0 to 40 |
| Fatigue Strength, MPa | 170 to 740 | |
| 220 to 400 |
| Poisson's Ratio | 0.29 | |
| 0.31 |
| Shear Modulus, GPa | 84 to 89 | |
| 73 |
| Tensile Strength: Ultimate (UTS), MPa | 900 to 1900 | |
| 620 to 1100 |
| Tensile Strength: Yield (Proof), MPa | 300 to 1650 | |
| 270 to 1040 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 290 |
| Melting Completion (Liquidus), °C | 1440 | |
| 1420 |
| Melting Onset (Solidus), °C | 1320 | |
| 1370 |
| Specific Heat Capacity, J/kg-K | 440 | |
| 440 |
| Thermal Expansion, µm/m-K | 13 | |
| 11 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 1.7 | |
| 2.9 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 1.8 | |
| 3.0 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 100 | |
| 60 |
| Density, g/cm3 | 8.7 | |
| 8.8 |
| Embodied Carbon, kg CO2/kg material | 10 | |
| 10 |
| Embodied Energy, MJ/kg | 140 | |
| 140 |
| Embodied Water, L/kg | 410 | |
| 210 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 160 to 320 | |
| 22 to 200 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 210 to 5920 | |
| 190 to 2840 |
| Stiffness to Weight: Axial, points | 14 to 15 | |
| 12 |
| Stiffness to Weight: Bending, points | 23 to 24 | |
| 22 |
| Strength to Weight: Axial, points | 29 to 61 | |
| 19 to 35 |
| Strength to Weight: Bending, points | 24 to 39 | |
| 18 to 27 |
| Thermal Shock Resistance, points | 23 to 46 | |
| 21 to 37 |
Alloy Composition
| Boron (B), % | 0 to 0.015 | |
| 0 |
| Carbon (C), % | 0 to 0.025 | |
| 0 to 0.050 |
| Chromium (Cr), % | 19 to 21 | |
| 0 to 0.3 |
| Cobalt (Co), % | 29.1 to 39 | |
| 0 to 0.5 |
| Copper (Cu), % | 0 | |
| 0 to 0.3 |
| Iron (Fe), % | 0 to 1.0 | |
| 9.5 to 17.5 |
| Manganese (Mn), % | 0 to 0.15 | |
| 0 to 0.8 |
| Molybdenum (Mo), % | 9.0 to 10.5 | |
| 3.5 to 6.0 |
| Nickel (Ni), % | 33 to 37 | |
| 79 to 82 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 to 0.010 |
| Silicon (Si), % | 0 to 0.15 | |
| 0 to 0.5 |
| Sulfur (S), % | 0 to 0.010 | |
| 0 to 0.020 |
| Titanium (Ti), % | 0 to 1.0 | |
| 0 |