R30155 Cobalt vs. SAE-AISI 1541 Steel
Both R30155 cobalt and SAE-AISI 1541 steel are iron alloys. They have a modest 32% of their average alloy composition in common, which, by itself, doesn't mean much. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.
For each property being compared, the top bar is R30155 cobalt and the bottom bar is SAE-AISI 1541 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 220 | |
| 210 to 220 |
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 190 |
| Elongation at Break, % | 34 | |
| 11 to 17 |
| Fatigue Strength, MPa | 310 | |
| 260 to 420 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Reduction in Area, % | 34 | |
| 34 to 51 |
| Shear Modulus, GPa | 81 | |
| 73 |
| Shear Strength, MPa | 570 | |
| 440 to 480 |
| Tensile Strength: Ultimate (UTS), MPa | 850 | |
| 720 to 790 |
| Tensile Strength: Yield (Proof), MPa | 390 | |
| 390 to 680 |
Thermal Properties
| Latent Heat of Fusion, J/g | 300 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 1100 | |
| 400 |
| Melting Completion (Liquidus), °C | 1470 | |
| 1460 |
| Melting Onset (Solidus), °C | 1420 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 470 |
| Thermal Conductivity, W/m-K | 12 | |
| 52 |
| Thermal Expansion, µm/m-K | 14 | |
| 12 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 80 | |
| 1.9 |
| Density, g/cm3 | 8.5 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 9.7 | |
| 1.4 |
| Embodied Energy, MJ/kg | 150 | |
| 19 |
| Embodied Water, L/kg | 300 | |
| 48 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 230 | |
| 78 to 100 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 370 | |
| 410 to 1250 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 23 | |
| 24 |
| Strength to Weight: Axial, points | 28 | |
| 25 to 28 |
| Strength to Weight: Bending, points | 24 | |
| 23 to 24 |
| Thermal Diffusivity, mm2/s | 3.2 | |
| 14 |
| Thermal Shock Resistance, points | 21 | |
| 23 to 25 |
Alloy Composition
| Carbon (C), % | 0.080 to 0.16 | |
| 0.36 to 0.44 |
| Chromium (Cr), % | 20 to 22.5 | |
| 0 |
| Cobalt (Co), % | 18.5 to 21 | |
| 0 |
| Iron (Fe), % | 24.3 to 36.2 | |
| 97.8 to 98.3 |
| Manganese (Mn), % | 1.0 to 2.0 | |
| 1.4 to 1.7 |
| Molybdenum (Mo), % | 2.5 to 3.5 | |
| 0 |
| Nickel (Ni), % | 19 to 21 | |
| 0 |
| Niobium (Nb), % | 0.75 to 1.3 | |
| 0 |
| Nitrogen (N), % | 0 to 0.2 | |
| 0 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.050 |
| Tantalum (Ta), % | 0.75 to 1.3 | |
| 0 |
| Tungsten (W), % | 2.0 to 3.0 | |
| 0 |