EN 1.7779 Steel vs. EN 1.3961 Alloy
Both EN 1.7779 steel and EN 1.3961 alloy are iron alloys. Both are furnished in the quenched and tempered condition. 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 (9, in this case) are not shown.
For each property being compared, the top bar is EN 1.7779 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, % | 16 | |
| 31 |
| Poisson's Ratio | 0.29 | |
| 0.3 |
| Shear Modulus, GPa | 73 | |
| 72 |
| Shear Strength, MPa | 500 | |
| 300 |
| Tensile Strength: Ultimate (UTS), MPa | 810 | |
| 450 |
| Tensile Strength: Yield (Proof), MPa | 660 | |
| 310 |
Thermal Properties
| Latent Heat of Fusion, J/g | 260 | |
| 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 | 4.0 | |
| 25 |
| Density, g/cm3 | 7.8 | |
| 8.2 |
| Embodied Carbon, kg CO2/kg material | 2.8 | |
| 4.8 |
| Embodied Energy, MJ/kg | 41 | |
| 66 |
| Embodied Water, L/kg | 64 | |
| 110 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 120 | |
| 130 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1150 | |
| 250 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 23 |
| Strength to Weight: Axial, points | 29 | |
| 15 |
| Strength to Weight: Bending, points | 25 | |
| 16 |
| Thermal Shock Resistance, points | 23 | |
| 130 |
Alloy Composition
| Aluminum (Al), % | 0 to 0.040 | |
| 0 |
| Carbon (C), % | 0.17 to 0.23 | |
| 0 to 0.050 |
| Chromium (Cr), % | 3.0 to 3.3 | |
| 0 to 0.25 |
| Copper (Cu), % | 0 to 0.3 | |
| 0 |
| Iron (Fe), % | 93.8 to 95.4 | |
| 60.7 to 65 |
| Manganese (Mn), % | 0.3 to 0.5 | |
| 0 to 0.5 |
| Molybdenum (Mo), % | 0.5 to 0.6 | |
| 0 to 1.0 |
| Nickel (Ni), % | 0 to 0.3 | |
| 35 to 37 |
| Phosphorus (P), % | 0 to 0.025 | |
| 0 to 0.030 |
| Silicon (Si), % | 0.15 to 0.35 | |
| 0 to 0.5 |
| Sulfur (S), % | 0 to 0.010 | |
| 0 to 0.020 |
| Vanadium (V), % | 0.45 to 0.55 | |
| 0 |