R30008 Cobalt vs. EN 1.4525 Stainless Steel
R30008 cobalt belongs to the cobalt alloys classification, while EN 1.4525 stainless steel belongs to the iron alloys. They have a modest 36% of their average alloy composition in common, which, by itself, doesn't mean much. 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 1.4525 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 190 |
| Elongation at Break, % | 1.1 to 73 | |
| 5.6 to 13 |
| Fatigue Strength, MPa | 320 to 530 | |
| 480 to 540 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 83 | |
| 76 |
| Tensile Strength: Ultimate (UTS), MPa | 950 to 1700 | |
| 1030 to 1250 |
| Tensile Strength: Yield (Proof), MPa | 500 to 1080 | |
| 840 to 1120 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 280 |
| Melting Completion (Liquidus), °C | 1400 | |
| 1430 |
| Melting Onset (Solidus), °C | 1330 | |
| 1390 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 480 |
| Thermal Expansion, µm/m-K | 13 | |
| 11 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 95 | |
| 13 |
| Density, g/cm3 | 8.4 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 8.1 | |
| 2.8 |
| Embodied Energy, MJ/kg | 110 | |
| 39 |
| Embodied Water, L/kg | 400 | |
| 130 |
Common Calculations
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 590 to 2720 | |
| 1820 to 3230 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 24 | |
| 25 |
| Strength to Weight: Axial, points | 31 to 56 | |
| 36 to 45 |
| Strength to Weight: Bending, points | 25 to 37 | |
| 29 to 33 |
| Thermal Shock Resistance, points | 25 to 44 | |
| 34 to 41 |
Alloy Composition
| Boron (B), % | 0 to 0.0010 | |
| 0 |
| Carbon (C), % | 0 to 0.15 | |
| 0 to 0.070 |
| Chromium (Cr), % | 18.5 to 21.5 | |
| 15 to 17 |
| Cobalt (Co), % | 39 to 42 | |
| 0 |
| Copper (Cu), % | 0 | |
| 2.5 to 4.0 |
| Iron (Fe), % | 7.6 to 20 | |
| 70.4 to 79 |
| Manganese (Mn), % | 1.0 to 2.0 | |
| 0 to 1.0 |
| Molybdenum (Mo), % | 6.5 to 7.5 | |
| 0 to 0.8 |
| Nickel (Ni), % | 15 to 18 | |
| 3.5 to 5.5 |
| Niobium (Nb), % | 0 | |
| 0 to 0.35 |
| Nitrogen (N), % | 0 | |
| 0 to 0.050 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 to 0.035 |
| Silicon (Si), % | 0 to 1.2 | |
| 0 to 0.8 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.025 |