R30008 Cobalt vs. EN 1.1203 Steel
R30008 cobalt belongs to the cobalt alloys classification, while EN 1.1203 steel belongs to the iron alloys. There are 23 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 R30008 cobalt and the bottom bar is EN 1.1203 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 190 |
| Elongation at Break, % | 1.1 to 73 | |
| 12 to 15 |
| Fatigue Strength, MPa | 320 to 530 | |
| 210 to 310 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 83 | |
| 72 |
| Tensile Strength: Ultimate (UTS), MPa | 950 to 1700 | |
| 690 to 780 |
| Tensile Strength: Yield (Proof), MPa | 500 to 1080 | |
| 340 to 480 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 250 |
| Melting Completion (Liquidus), °C | 1400 | |
| 1460 |
| Melting Onset (Solidus), °C | 1330 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 470 |
| Thermal Expansion, µm/m-K | 13 | |
| 12 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 95 | |
| 2.1 |
| Density, g/cm3 | 8.4 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 8.1 | |
| 1.4 |
| Embodied Energy, MJ/kg | 110 | |
| 19 |
| Embodied Water, L/kg | 400 | |
| 47 |
Common Calculations
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 590 to 2720 | |
| 310 to 610 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 31 to 56 | |
| 25 to 28 |
| Strength to Weight: Bending, points | 25 to 37 | |
| 22 to 24 |
| Thermal Shock Resistance, points | 25 to 44 | |
| 22 to 25 |
Alloy Composition
| Boron (B), % | 0 to 0.0010 | |
| 0 |
| Carbon (C), % | 0 to 0.15 | |
| 0.52 to 0.6 |
| Chromium (Cr), % | 18.5 to 21.5 | |
| 0 to 0.4 |
| Cobalt (Co), % | 39 to 42 | |
| 0 |
| Iron (Fe), % | 7.6 to 20 | |
| 97.1 to 98.9 |
| Manganese (Mn), % | 1.0 to 2.0 | |
| 0.6 to 0.9 |
| Molybdenum (Mo), % | 6.5 to 7.5 | |
| 0 to 0.1 |
| Nickel (Ni), % | 15 to 18 | |
| 0 to 0.4 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 to 0.035 |
| Silicon (Si), % | 0 to 1.2 | |
| 0 to 0.4 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.035 |