R30008 Cobalt vs. AISI 310S Stainless Steel
R30008 cobalt belongs to the cobalt alloys classification, while AISI 310S stainless steel belongs to the iron alloys. They have 52% of their average alloy composition in common. There are 23 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.
For each property being compared, the top bar is R30008 cobalt and the bottom bar is AISI 310S stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 200 |
| Elongation at Break, % | 1.1 to 73 | |
| 34 to 44 |
| Fatigue Strength, MPa | 320 to 530 | |
| 250 to 280 |
| Poisson's Ratio | 0.29 | |
| 0.27 |
| Shear Modulus, GPa | 83 | |
| 79 |
| Tensile Strength: Ultimate (UTS), MPa | 950 to 1700 | |
| 600 to 710 |
| Tensile Strength: Yield (Proof), MPa | 500 to 1080 | |
| 270 to 350 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 310 |
| Melting Completion (Liquidus), °C | 1400 | |
| 1450 |
| Melting Onset (Solidus), °C | 1330 | |
| 1400 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 480 |
| Thermal Expansion, µm/m-K | 13 | |
| 16 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 95 | |
| 25 |
| Density, g/cm3 | 8.4 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 8.1 | |
| 4.3 |
| Embodied Energy, MJ/kg | 110 | |
| 61 |
| Embodied Water, L/kg | 400 | |
| 190 |
Common Calculations
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 590 to 2720 | |
| 190 to 310 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 24 | |
| 25 |
| Strength to Weight: Axial, points | 31 to 56 | |
| 21 to 25 |
| Strength to Weight: Bending, points | 25 to 37 | |
| 20 to 22 |
| Thermal Shock Resistance, points | 25 to 44 | |
| 14 to 16 |
Alloy Composition
| Boron (B), % | 0 to 0.0010 | |
| 0 |
| Carbon (C), % | 0 to 0.15 | |
| 0 to 0.080 |
| Chromium (Cr), % | 18.5 to 21.5 | |
| 24 to 26 |
| Cobalt (Co), % | 39 to 42 | |
| 0 |
| Iron (Fe), % | 7.6 to 20 | |
| 48.3 to 57 |
| Manganese (Mn), % | 1.0 to 2.0 | |
| 0 to 2.0 |
| Molybdenum (Mo), % | 6.5 to 7.5 | |
| 0 |
| Nickel (Ni), % | 15 to 18 | |
| 19 to 22 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 to 0.045 |
| Silicon (Si), % | 0 to 1.2 | |
| 0 to 1.5 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.030 |