S81921 Stainless Steel vs. 50Cr-50Ni-Cb Alloy
S81921 stainless steel belongs to the iron alloys classification, while 50Cr-50Ni-Cb alloy belongs to the otherwise unclassified metals. They have a modest 25% of their average alloy composition in common, which, by itself, doesn't mean much. There are 21 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.
For each property being compared, the top bar is S81921 stainless steel and the bottom bar is 50Cr-50Ni-Cb alloy.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 210 |
| Elongation at Break, % | 29 | |
| 5.6 |
| Poisson's Ratio | 0.28 | |
| 0.26 |
| Shear Modulus, GPa | 79 | |
| 84 |
| Tensile Strength: Ultimate (UTS), MPa | 710 | |
| 620 |
| Tensile Strength: Yield (Proof), MPa | 500 | |
| 390 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 350 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 480 |
| Thermal Expansion, µm/m-K | 13 | |
| 15 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 14 | |
| 60 |
| Density, g/cm3 | 7.7 | |
| 8.0 |
| Embodied Carbon, kg CO2/kg material | 2.9 | |
| 9.2 |
| Embodied Energy, MJ/kg | 41 | |
| 130 |
| Embodied Water, L/kg | 150 | |
| 350 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 180 | |
| 30 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 630 | |
| 370 |
| Stiffness to Weight: Axial, points | 14 | |
| 15 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 25 | |
| 21 |
| Strength to Weight: Bending, points | 23 | |
| 20 |
| Thermal Shock Resistance, points | 20 | |
| 14 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 0 to 0.25 |
| Carbon (C), % | 0 to 0.030 | |
| 0 to 0.1 |
| Chromium (Cr), % | 19 to 22 | |
| 47 to 52 |
| Iron (Fe), % | 66.7 to 75.9 | |
| 0 to 1.0 |
| Manganese (Mn), % | 2.0 to 4.0 | |
| 0 to 0.3 |
| Molybdenum (Mo), % | 1.0 to 2.0 | |
| 0 |
| Nickel (Ni), % | 2.0 to 4.0 | |
| 43.3 to 51.6 |
| Niobium (Nb), % | 0 | |
| 1.4 to 1.7 |
| Nitrogen (N), % | 0.14 to 0.2 | |
| 0 to 0.16 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.020 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 0.5 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.020 |
| Titanium (Ti), % | 0 | |
| 0 to 0.5 |