R30155 Cobalt vs. S46500 Stainless Steel
Both R30155 cobalt and S46500 stainless steel are iron alloys. They have 54% of their average alloy composition in common. There are 27 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.
For each property being compared, the top bar is R30155 cobalt and the bottom bar is S46500 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 190 |
| Elongation at Break, % | 34 | |
| 2.3 to 14 |
| Fatigue Strength, MPa | 310 | |
| 550 to 890 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 81 | |
| 75 |
| Shear Strength, MPa | 570 | |
| 730 to 1120 |
| Tensile Strength: Ultimate (UTS), MPa | 850 | |
| 1260 to 1930 |
| Tensile Strength: Yield (Proof), MPa | 390 | |
| 1120 to 1810 |
Thermal Properties
| Latent Heat of Fusion, J/g | 300 | |
| 280 |
| Maximum Temperature: Corrosion, °C | 570 | |
| 680 |
| Maximum Temperature: Mechanical, °C | 1100 | |
| 780 |
| Melting Completion (Liquidus), °C | 1470 | |
| 1450 |
| Melting Onset (Solidus), °C | 1420 | |
| 1410 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 470 |
| Thermal Expansion, µm/m-K | 14 | |
| 11 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 80 | |
| 15 |
| Density, g/cm3 | 8.5 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 9.7 | |
| 3.6 |
| Embodied Energy, MJ/kg | 150 | |
| 51 |
| Embodied Water, L/kg | 300 | |
| 120 |
Common Calculations
| PREN (Pitting Resistance) | 37 | |
| 15 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 230 | |
| 43 to 210 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 23 | |
| 25 |
| Strength to Weight: Axial, points | 28 | |
| 44 to 68 |
| Strength to Weight: Bending, points | 24 | |
| 33 to 44 |
| Thermal Shock Resistance, points | 21 | |
| 44 to 67 |
Alloy Composition
| Carbon (C), % | 0.080 to 0.16 | |
| 0 to 0.020 |
| Chromium (Cr), % | 20 to 22.5 | |
| 11 to 12.5 |
| Cobalt (Co), % | 18.5 to 21 | |
| 0 |
| Iron (Fe), % | 24.3 to 36.2 | |
| 72.6 to 76.1 |
| Manganese (Mn), % | 1.0 to 2.0 | |
| 0 to 0.25 |
| Molybdenum (Mo), % | 2.5 to 3.5 | |
| 0.75 to 1.3 |
| Nickel (Ni), % | 19 to 21 | |
| 10.7 to 11.3 |
| Niobium (Nb), % | 0.75 to 1.3 | |
| 0 |
| Nitrogen (N), % | 0 to 0.2 | |
| 0 to 0.010 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.015 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 0.25 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.010 |
| Tantalum (Ta), % | 0.75 to 1.3 | |
| 0 |
| Titanium (Ti), % | 0 | |
| 1.5 to 1.8 |
| Tungsten (W), % | 2.0 to 3.0 | |
| 0 |