S46500 Stainless Steel vs. R31538 Cobalt
S46500 stainless steel belongs to the iron alloys classification, while R31538 cobalt belongs to the cobalt alloys. There are 23 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.
For each property being compared, the top bar is S46500 stainless steel and the bottom bar is R31538 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 220 |
| Elongation at Break, % | 2.3 to 14 | |
| 13 to 23 |
| Fatigue Strength, MPa | 550 to 890 | |
| 310 to 480 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Rockwell C Hardness | 29 to 54 | |
| 25 to 35 |
| Shear Modulus, GPa | 75 | |
| 86 |
| Tensile Strength: Ultimate (UTS), MPa | 1260 to 1930 | |
| 1020 to 1360 |
| Tensile Strength: Yield (Proof), MPa | 1120 to 1810 | |
| 580 to 930 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 320 |
| Melting Completion (Liquidus), °C | 1450 | |
| 1360 |
| Melting Onset (Solidus), °C | 1410 | |
| 1290 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 450 |
| Thermal Expansion, µm/m-K | 11 | |
| 13 |
Otherwise Unclassified Properties
| Density, g/cm3 | 7.9 | |
| 8.4 |
| Embodied Carbon, kg CO2/kg material | 3.6 | |
| 8.1 |
| Embodied Energy, MJ/kg | 51 | |
| 110 |
| Embodied Water, L/kg | 120 | |
| 530 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 43 to 210 | |
| 140 to 200 |
| Stiffness to Weight: Axial, points | 14 | |
| 15 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 |
| Strength to Weight: Axial, points | 44 to 68 | |
| 34 to 45 |
| Strength to Weight: Bending, points | 33 to 44 | |
| 27 to 32 |
| Thermal Shock Resistance, points | 44 to 67 | |
| 25 to 33 |
Alloy Composition
| Carbon (C), % | 0 to 0.020 | |
| 0.15 to 0.35 |
| Chromium (Cr), % | 11 to 12.5 | |
| 26 to 30 |
| Cobalt (Co), % | 0 | |
| 58.7 to 68.9 |
| Iron (Fe), % | 72.6 to 76.1 | |
| 0 to 0.75 |
| Manganese (Mn), % | 0 to 0.25 | |
| 0 to 1.0 |
| Molybdenum (Mo), % | 0.75 to 1.3 | |
| 5.0 to 7.0 |
| Nickel (Ni), % | 10.7 to 11.3 | |
| 0 to 1.0 |
| Nitrogen (N), % | 0 to 0.010 | |
| 0 to 0.25 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 |
| Silicon (Si), % | 0 to 0.25 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.010 | |
| 0 |
| Titanium (Ti), % | 1.5 to 1.8 | |
| 0 |