EN 1.7779 Steel vs. EN 1.7335 Steel
Both EN 1.7779 steel and EN 1.7335 steel are iron alloys. They have a very high 97% 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 1.7335 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 240 | |
| 150 to 160 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 16 | |
| 21 to 22 |
| Fatigue Strength, MPa | 430 | |
| 200 to 220 |
| Impact Strength: V-Notched Charpy, J | 38 | |
| 31 to 35 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 73 | |
| 73 |
| Shear Strength, MPa | 500 | |
| 310 to 330 |
| Tensile Strength: Ultimate (UTS), MPa | 810 | |
| 500 to 520 |
| Tensile Strength: Yield (Proof), MPa | 660 | |
| 280 to 310 |
Thermal Properties
| Latent Heat of Fusion, J/g | 260 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 470 | |
| 430 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1470 |
| Melting Onset (Solidus), °C | 1420 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 39 | |
| 44 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.7 | |
| 7.3 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.9 | |
| 8.4 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 4.0 | |
| 2.8 |
| Density, g/cm3 | 7.8 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 2.8 | |
| 1.6 |
| Embodied Energy, MJ/kg | 41 | |
| 21 |
| Embodied Water, L/kg | 64 | |
| 52 |
Common Calculations
| PREN (Pitting Resistance) | 5.0 | |
| 2.7 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 120 | |
| 91 to 97 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1150 | |
| 210 to 260 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 29 | |
| 18 |
| Strength to Weight: Bending, points | 25 | |
| 18 |
| Thermal Diffusivity, mm2/s | 11 | |
| 12 |
| Thermal Shock Resistance, points | 23 | |
| 15 |
Alloy Composition
| Aluminum (Al), % | 0 to 0.040 | |
| 0 |
| Carbon (C), % | 0.17 to 0.23 | |
| 0.080 to 0.18 |
| Chromium (Cr), % | 3.0 to 3.3 | |
| 0.7 to 1.2 |
| Copper (Cu), % | 0 to 0.3 | |
| 0 to 0.3 |
| Iron (Fe), % | 93.8 to 95.4 | |
| 96.4 to 98.4 |
| Manganese (Mn), % | 0.3 to 0.5 | |
| 0.4 to 1.0 |
| Molybdenum (Mo), % | 0.5 to 0.6 | |
| 0.4 to 0.6 |
| Nickel (Ni), % | 0 to 0.3 | |
| 0 |
| Nitrogen (N), % | 0 | |
| 0 to 0.012 |
| Phosphorus (P), % | 0 to 0.025 | |
| 0 to 0.025 |
| Silicon (Si), % | 0.15 to 0.35 | |
| 0 to 0.35 |
| Sulfur (S), % | 0 to 0.010 | |
| 0 to 0.010 |
| Vanadium (V), % | 0.45 to 0.55 | |
| 0 |