EN 1.7779 Steel vs. EN 1.7386 Steel
Both EN 1.7779 steel and EN 1.7386 steel are iron alloys. They have a moderately high 93% 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 1.7386 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 240 | |
| 170 to 200 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 16 | |
| 18 to 21 |
| Fatigue Strength, MPa | 430 | |
| 170 to 290 |
| Impact Strength: V-Notched Charpy, J | 38 | |
| 38 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 73 | |
| 75 |
| Shear Strength, MPa | 500 | |
| 340 to 410 |
| Tensile Strength: Ultimate (UTS), MPa | 810 | |
| 550 to 670 |
| Tensile Strength: Yield (Proof), MPa | 660 | |
| 240 to 440 |
Thermal Properties
| Latent Heat of Fusion, J/g | 260 | |
| 270 |
| Maximum Temperature: Mechanical, °C | 470 | |
| 600 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1450 |
| Melting Onset (Solidus), °C | 1420 | |
| 1410 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 480 |
| Thermal Conductivity, W/m-K | 39 | |
| 26 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.7 | |
| 9.0 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.9 | |
| 10 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 4.0 | |
| 6.5 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 2.8 | |
| 2.0 |
| Embodied Energy, MJ/kg | 41 | |
| 28 |
| Embodied Water, L/kg | 64 | |
| 88 |
Common Calculations
| PREN (Pitting Resistance) | 5.0 | |
| 12 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 120 | |
| 92 to 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1150 | |
| 150 to 490 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 24 | |
| 25 |
| Strength to Weight: Axial, points | 29 | |
| 20 to 24 |
| Strength to Weight: Bending, points | 25 | |
| 19 to 22 |
| Thermal Diffusivity, mm2/s | 11 | |
| 6.9 |
| Thermal Shock Resistance, points | 23 | |
| 15 to 18 |
Alloy Composition
| Aluminum (Al), % | 0 to 0.040 | |
| 0 to 0.040 |
| Carbon (C), % | 0.17 to 0.23 | |
| 0.080 to 0.15 |
| Chromium (Cr), % | 3.0 to 3.3 | |
| 8.0 to 10 |
| Copper (Cu), % | 0 to 0.3 | |
| 0 to 0.3 |
| Iron (Fe), % | 93.8 to 95.4 | |
| 86.8 to 90.5 |
| Manganese (Mn), % | 0.3 to 0.5 | |
| 0.3 to 0.6 |
| Molybdenum (Mo), % | 0.5 to 0.6 | |
| 0.9 to 1.1 |
| Nickel (Ni), % | 0 to 0.3 | |
| 0 |
| Phosphorus (P), % | 0 to 0.025 | |
| 0 to 0.025 |
| Silicon (Si), % | 0.15 to 0.35 | |
| 0.25 to 1.0 |
| Sulfur (S), % | 0 to 0.010 | |
| 0 to 0.010 |
| Vanadium (V), % | 0.45 to 0.55 | |
| 0 |