SAE-AISI 8740 Steel vs. 50Cr-50Ni Alloy
SAE-AISI 8740 steel belongs to the iron alloys classification, while 50Cr-50Ni alloy belongs to the otherwise unclassified metals. There are 21 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.
For each property being compared, the top bar is SAE-AISI 8740 steel and the bottom bar is 50Cr-50Ni alloy.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 210 |
| Elongation at Break, % | 11 to 23 | |
| 5.7 |
| Poisson's Ratio | 0.29 | |
| 0.26 |
| Shear Modulus, GPa | 73 | |
| 84 |
| Tensile Strength: Ultimate (UTS), MPa | 580 to 670 | |
| 620 |
| Tensile Strength: Yield (Proof), MPa | 380 to 570 | |
| 390 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 350 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 490 |
| Thermal Expansion, µm/m-K | 13 | |
| 15 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.6 | |
| 50 |
| Density, g/cm3 | 7.8 | |
| 8.0 |
| Embodied Carbon, kg CO2/kg material | 1.5 | |
| 7.9 |
| Embodied Energy, MJ/kg | 20 | |
| 110 |
| Embodied Water, L/kg | 50 | |
| 350 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 71 to 120 | |
| 31 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 390 to 850 | |
| 350 |
| Stiffness to Weight: Axial, points | 13 | |
| 15 |
| Stiffness to Weight: Bending, points | 24 | |
| 25 |
| Strength to Weight: Axial, points | 20 to 24 | |
| 21 |
| Strength to Weight: Bending, points | 20 to 22 | |
| 20 |
| Thermal Shock Resistance, points | 17 to 20 | |
| 14 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 0 to 0.25 |
| Carbon (C), % | 0.38 to 0.43 | |
| 0 to 0.1 |
| Chromium (Cr), % | 0.4 to 0.6 | |
| 48 to 52 |
| Iron (Fe), % | 96.5 to 97.7 | |
| 0 to 1.0 |
| Manganese (Mn), % | 0.75 to 1.0 | |
| 0 to 0.3 |
| Molybdenum (Mo), % | 0.2 to 0.3 | |
| 0 |
| Nickel (Ni), % | 0.4 to 0.7 | |
| 44.5 to 52 |
| Nitrogen (N), % | 0 | |
| 0 to 0.3 |
| Phosphorus (P), % | 0 to 0.035 | |
| 0 to 0.020 |
| Silicon (Si), % | 0.15 to 0.35 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.040 | |
| 0 to 0.020 |
| Titanium (Ti), % | 0 | |
| 0 to 0.5 |