EN 1.7779 Steel vs. EN 1.7366 Steel
Both EN 1.7779 steel and EN 1.7366 steel are iron alloys. They have a very high 98% of their average alloy composition in common.
For each property being compared, the top bar is EN 1.7779 steel and the bottom bar is EN 1.7366 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 240 | |
| 140 to 210 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 16 | |
| 17 to 19 |
| Fatigue Strength, MPa | 430 | |
| 160 to 320 |
| Impact Strength: V-Notched Charpy, J | 38 | |
| 38 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 73 | |
| 74 |
| Shear Strength, MPa | 500 | |
| 290 to 440 |
| Tensile Strength: Ultimate (UTS), MPa | 810 | |
| 460 to 710 |
| Tensile Strength: Yield (Proof), MPa | 660 | |
| 230 to 480 |
Thermal Properties
| Latent Heat of Fusion, J/g | 260 | |
| 260 |
| Maximum Temperature: Mechanical, °C | 470 | |
| 510 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1460 |
| Melting Onset (Solidus), °C | 1420 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 39 | |
| 40 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.7 | |
| 8.1 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.9 | |
| 9.3 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 4.0 | |
| 4.3 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 2.8 | |
| 1.7 |
| Embodied Energy, MJ/kg | 41 | |
| 23 |
| Embodied Water, L/kg | 64 | |
| 69 |
Common Calculations
| PREN (Pitting Resistance) | 5.0 | |
| 6.8 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 120 | |
| 74 to 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1150 | |
| 140 to 600 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 24 | |
| 25 |
| Strength to Weight: Axial, points | 29 | |
| 16 to 25 |
| Strength to Weight: Bending, points | 25 | |
| 17 to 23 |
| Thermal Diffusivity, mm2/s | 11 | |
| 11 |
| Thermal Shock Resistance, points | 23 | |
| 13 to 20 |
Alloy Composition
| Aluminum (Al), % | 0 to 0.040 | |
| 0 |
| Carbon (C), % | 0.17 to 0.23 | |
| 0 to 0.18 |
| Chromium (Cr), % | 3.0 to 3.3 | |
| 4.0 to 6.0 |
| Copper (Cu), % | 0 to 0.3 | |
| 0 |
| Iron (Fe), % | 93.8 to 95.4 | |
| 91.9 to 95.3 |
| Manganese (Mn), % | 0.3 to 0.5 | |
| 0.3 to 0.8 |
| Molybdenum (Mo), % | 0.5 to 0.6 | |
| 0.45 to 0.65 |
| Nickel (Ni), % | 0 to 0.3 | |
| 0 |
| Phosphorus (P), % | 0 to 0.025 | |
| 0 to 0.025 |
| Silicon (Si), % | 0.15 to 0.35 | |
| 0 to 0.4 |
| Sulfur (S), % | 0 to 0.010 | |
| 0 to 0.015 |
| Vanadium (V), % | 0.45 to 0.55 | |
| 0 |