R30155 Cobalt vs. S46910 Stainless Steel
Both R30155 cobalt and S46910 stainless steel are iron alloys. They have 55% of their average alloy composition in common. There are 29 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 S46910 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 220 | |
| 270 to 630 |
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 200 |
| Elongation at Break, % | 34 | |
| 2.2 to 11 |
| Fatigue Strength, MPa | 310 | |
| 250 to 1020 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 81 | |
| 76 |
| Shear Strength, MPa | 570 | |
| 410 to 1410 |
| Tensile Strength: Ultimate (UTS), MPa | 850 | |
| 680 to 2470 |
| Tensile Strength: Yield (Proof), MPa | 390 | |
| 450 to 2290 |
Thermal Properties
| Latent Heat of Fusion, J/g | 300 | |
| 280 |
| Maximum Temperature: Corrosion, °C | 570 | |
| 540 |
| Maximum Temperature: Mechanical, °C | 1100 | |
| 810 |
| Melting Completion (Liquidus), °C | 1470 | |
| 1460 |
| Melting Onset (Solidus), °C | 1420 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 470 |
| Thermal Expansion, µm/m-K | 14 | |
| 11 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 80 | |
| 18 |
| Density, g/cm3 | 8.5 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 9.7 | |
| 4.1 |
| Embodied Energy, MJ/kg | 150 | |
| 55 |
| Embodied Water, L/kg | 300 | |
| 140 |
Common Calculations
| PREN (Pitting Resistance) | 37 | |
| 25 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 230 | |
| 48 to 130 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 370 | |
| 510 to 4780 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 23 | |
| 24 |
| Strength to Weight: Axial, points | 28 | |
| 24 to 86 |
| Strength to Weight: Bending, points | 24 | |
| 22 to 51 |
| Thermal Shock Resistance, points | 21 | |
| 23 to 84 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 0.15 to 0.5 |
| Carbon (C), % | 0.080 to 0.16 | |
| 0 to 0.030 |
| Chromium (Cr), % | 20 to 22.5 | |
| 11 to 13 |
| Cobalt (Co), % | 18.5 to 21 | |
| 0 |
| Copper (Cu), % | 0 | |
| 1.5 to 3.5 |
| Iron (Fe), % | 24.3 to 36.2 | |
| 65 to 76 |
| Manganese (Mn), % | 1.0 to 2.0 | |
| 0 to 1.0 |
| Molybdenum (Mo), % | 2.5 to 3.5 | |
| 3.0 to 5.0 |
| Nickel (Ni), % | 19 to 21 | |
| 8.0 to 10 |
| Niobium (Nb), % | 0.75 to 1.3 | |
| 0 |
| Nitrogen (N), % | 0 to 0.2 | |
| 0 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.030 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 0.7 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.015 |
| Tantalum (Ta), % | 0.75 to 1.3 | |
| 0 |
| Titanium (Ti), % | 0 | |
| 0.5 to 1.2 |
| Tungsten (W), % | 2.0 to 3.0 | |
| 0 |