EN 1.7767 Steel vs. EN 1.7378 Steel
Both EN 1.7767 steel and EN 1.7378 steel are iron alloys. Their average alloy composition is basically identical.
For each property being compared, the top bar is EN 1.7767 steel and the bottom bar is EN 1.7378 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 200 to 210 | |
| 210 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 20 | |
| 17 |
| Fatigue Strength, MPa | 320 to 340 | |
| 330 |
| Impact Strength: V-Notched Charpy, J | 46 | |
| 38 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 74 | |
| 74 |
| Shear Strength, MPa | 420 to 430 | |
| 430 |
| Tensile Strength: Ultimate (UTS), MPa | 670 to 690 | |
| 700 |
| Tensile Strength: Yield (Proof), MPa | 460 to 500 | |
| 490 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 260 |
| Maximum Temperature: Mechanical, °C | 480 | |
| 460 |
| Melting Completion (Liquidus), °C | 1470 | |
| 1470 |
| Melting Onset (Solidus), °C | 1430 | |
| 1430 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 40 | |
| 39 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.7 | |
| 7.6 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.9 | |
| 8.7 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 4.5 | |
| 4.0 |
| Density, g/cm3 | 7.9 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 2.4 | |
| 2.3 |
| Embodied Energy, MJ/kg | 33 | |
| 33 |
| Embodied Water, L/kg | 64 | |
| 61 |
Common Calculations
| PREN (Pitting Resistance) | 6.4 | |
| 5.8 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 120 to 130 | |
| 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 570 to 650 | |
| 630 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 24 | |
| 25 |
| Strength to Weight: Bending, points | 22 | |
| 22 |
| Thermal Diffusivity, mm2/s | 11 | |
| 10 |
| Thermal Shock Resistance, points | 19 to 20 | |
| 20 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 0 to 0.020 |
| Boron (B), % | 0 | |
| 0.0015 to 0.0070 |
| Carbon (C), % | 0.1 to 0.15 | |
| 0.050 to 0.1 |
| Chromium (Cr), % | 2.8 to 3.3 | |
| 2.2 to 2.6 |
| Copper (Cu), % | 0 to 0.25 | |
| 0 |
| Iron (Fe), % | 93.8 to 95.8 | |
| 94.6 to 96.1 |
| Manganese (Mn), % | 0.3 to 0.6 | |
| 0.3 to 0.7 |
| Molybdenum (Mo), % | 0.9 to 1.1 | |
| 0.9 to 1.1 |
| Nickel (Ni), % | 0 to 0.25 | |
| 0 |
| Niobium (Nb), % | 0 to 0.070 | |
| 0 |
| Nitrogen (N), % | 0 to 0.012 | |
| 0 to 0.010 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 to 0.020 |
| Silicon (Si), % | 0 to 0.15 | |
| 0.15 to 0.45 |
| Sulfur (S), % | 0 to 0.0050 | |
| 0 to 0.010 |
| Titanium (Ti), % | 0 to 0.030 | |
| 0.050 to 0.1 |
| Vanadium (V), % | 0.2 to 0.3 | |
| 0.2 to 0.3 |