SAE-AISI 8740 Steel vs. EN 1.3961 Alloy
Both SAE-AISI 8740 steel and EN 1.3961 alloy are iron alloys. They have 64% of their average alloy composition in common. There are 24 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.
For each property being compared, the top bar is SAE-AISI 8740 steel and the bottom bar is EN 1.3961 alloy.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 11 to 23 | |
| 31 |
| Poisson's Ratio | 0.29 | |
| 0.3 |
| Shear Modulus, GPa | 73 | |
| 72 |
| Shear Strength, MPa | 370 to 400 | |
| 300 |
| Tensile Strength: Ultimate (UTS), MPa | 580 to 670 | |
| 450 |
| Tensile Strength: Yield (Proof), MPa | 380 to 570 | |
| 310 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 270 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1430 |
| Melting Onset (Solidus), °C | 1420 | |
| 1390 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 460 |
| Thermal Expansion, µm/m-K | 13 | |
| 1.3 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.6 | |
| 25 |
| Density, g/cm3 | 7.8 | |
| 8.2 |
| Embodied Carbon, kg CO2/kg material | 1.5 | |
| 4.8 |
| Embodied Energy, MJ/kg | 20 | |
| 66 |
| Embodied Water, L/kg | 50 | |
| 110 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 71 to 120 | |
| 130 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 390 to 850 | |
| 250 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 23 |
| Strength to Weight: Axial, points | 20 to 24 | |
| 15 |
| Strength to Weight: Bending, points | 20 to 22 | |
| 16 |
| Thermal Shock Resistance, points | 17 to 20 | |
| 130 |
Alloy Composition
| Carbon (C), % | 0.38 to 0.43 | |
| 0 to 0.050 |
| Chromium (Cr), % | 0.4 to 0.6 | |
| 0 to 0.25 |
| Iron (Fe), % | 96.5 to 97.7 | |
| 60.7 to 65 |
| Manganese (Mn), % | 0.75 to 1.0 | |
| 0 to 0.5 |
| Molybdenum (Mo), % | 0.2 to 0.3 | |
| 0 to 1.0 |
| Nickel (Ni), % | 0.4 to 0.7 | |
| 35 to 37 |
| Phosphorus (P), % | 0 to 0.035 | |
| 0 to 0.030 |
| Silicon (Si), % | 0.15 to 0.35 | |
| 0 to 0.5 |
| Sulfur (S), % | 0 to 0.040 | |
| 0 to 0.020 |