Annealed R30008 Cobalt vs. Annealed AISI W2
Annealed R30008 cobalt belongs to the cobalt alloys classification, while annealed AISI W2 belongs to the iron alloys. There are 23 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.
For each property being compared, the top bar is annealed R30008 cobalt and the bottom bar is annealed AISI W2.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 190 |
| Elongation at Break, % | 73 | |
| 22 |
| Fatigue Strength, MPa | 320 | |
| 240 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 83 | |
| 72 |
| Tensile Strength: Ultimate (UTS), MPa | 950 | |
| 580 |
| Tensile Strength: Yield (Proof), MPa | 500 | |
| 340 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 250 |
| Melting Completion (Liquidus), °C | 1400 | |
| 1450 |
| Melting Onset (Solidus), °C | 1330 | |
| 1410 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 470 |
| Thermal Expansion, µm/m-K | 13 | |
| 12 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 95 | |
| 2.3 |
| Density, g/cm3 | 8.4 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 8.1 | |
| 2.0 |
| Embodied Energy, MJ/kg | 110 | |
| 29 |
| Embodied Water, L/kg | 400 | |
| 48 |
Common Calculations
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 590 | |
| 320 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 31 | |
| 21 |
| Strength to Weight: Bending, points | 25 | |
| 20 |
| Thermal Shock Resistance, points | 25 | |
| 19 |
Alloy Composition
| Boron (B), % | 0 to 0.0010 | |
| 0 |
| Carbon (C), % | 0 to 0.15 | |
| 0.85 to 1.5 |
| Chromium (Cr), % | 18.5 to 21.5 | |
| 0 to 0.15 |
| Cobalt (Co), % | 39 to 42 | |
| 0 |
| Copper (Cu), % | 0 | |
| 0 to 0.2 |
| Iron (Fe), % | 7.6 to 20 | |
| 96.2 to 98.6 |
| Manganese (Mn), % | 1.0 to 2.0 | |
| 0.35 to 0.74 |
| Molybdenum (Mo), % | 6.5 to 7.5 | |
| 0 to 0.1 |
| Nickel (Ni), % | 15 to 18 | |
| 0 to 0.2 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 to 0.025 |
| Silicon (Si), % | 0 to 1.2 | |
| 0.1 to 0.4 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.025 |
| Tungsten (W), % | 0 | |
| 0 to 0.15 |
| Vanadium (V), % | 0 | |
| 0.15 to 0.35 |