R30012 Cobalt vs. SAE-AISI 1340 Steel
R30012 cobalt belongs to the cobalt alloys classification, while SAE-AISI 1340 steel belongs to the iron alloys. There are 27 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 R30012 cobalt and the bottom bar is SAE-AISI 1340 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 220 | |
| 190 |
| Elongation at Break, % | 1.0 | |
| 11 to 23 |
| Fatigue Strength, MPa | 320 | |
| 220 to 390 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Shear Modulus, GPa | 86 | |
| 72 |
| Tensile Strength: Ultimate (UTS), MPa | 830 | |
| 540 to 730 |
| Tensile Strength: Yield (Proof), MPa | 650 | |
| 300 to 620 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 250 |
| Melting Completion (Liquidus), °C | 1470 | |
| 1450 |
| Melting Onset (Solidus), °C | 1280 | |
| 1410 |
| Specific Heat Capacity, J/kg-K | 440 | |
| 470 |
| Thermal Conductivity, W/m-K | 15 | |
| 51 |
| Thermal Expansion, µm/m-K | 12 | |
| 12 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 1.8 | |
| 7.2 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 1.8 | |
| 8.3 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 8.3 | |
| 1.4 |
| Embodied Energy, MJ/kg | 120 | |
| 19 |
| Embodied Water, L/kg | 480 | |
| 48 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 7.7 | |
| 78 to 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 960 | |
| 240 to 1040 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 23 | |
| 24 |
| Strength to Weight: Axial, points | 26 | |
| 19 to 26 |
| Strength to Weight: Bending, points | 22 | |
| 19 to 23 |
| Thermal Diffusivity, mm2/s | 3.8 | |
| 14 |
| Thermal Shock Resistance, points | 23 | |
| 17 to 23 |
Alloy Composition
| Carbon (C), % | 1.4 to 2.0 | |
| 0.38 to 0.43 |
| Chromium (Cr), % | 27 to 32 | |
| 0 |
| Cobalt (Co), % | 47.5 to 64.1 | |
| 0 |
| Iron (Fe), % | 0 to 3.0 | |
| 97.2 to 97.9 |
| Manganese (Mn), % | 0 | |
| 1.6 to 1.9 |
| Molybdenum (Mo), % | 0 to 1.0 | |
| 0 |
| Nickel (Ni), % | 0 to 3.0 | |
| 0 |
| Phosphorus (P), % | 0 | |
| 0 to 0.035 |
| Silicon (Si), % | 0 to 2.0 | |
| 0.15 to 0.35 |
| Sulfur (S), % | 0 | |
| 0 to 0.040 |
| Tungsten (W), % | 7.5 to 9.5 | |
| 0 |