EN 1.7383 Steel vs. EN 1.7378 Steel
Both EN 1.7383 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 1.7383 steel and the bottom bar is EN 1.7378 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 170 to 180 | |
| 210 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 20 to 23 | |
| 17 |
| Fatigue Strength, MPa | 210 to 270 | |
| 330 |
| Impact Strength: V-Notched Charpy, J | 38 | |
| 38 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 74 | |
| 74 |
| Shear Strength, MPa | 350 to 380 | |
| 430 |
| Tensile Strength: Ultimate (UTS), MPa | 560 to 610 | |
| 700 |
| Tensile Strength: Yield (Proof), MPa | 300 to 400 | |
| 490 |
Thermal Properties
| Latent Heat of Fusion, J/g | 260 | |
| 260 |
| Maximum Temperature: Mechanical, °C | 460 | |
| 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 | 39 | |
| 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 | 8.8 | |
| 8.7 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 3.9 | |
| 4.0 |
| Density, g/cm3 | 7.9 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.8 | |
| 2.3 |
| Embodied Energy, MJ/kg | 23 | |
| 33 |
| Embodied Water, L/kg | 59 | |
| 61 |
Common Calculations
| PREN (Pitting Resistance) | 5.6 | |
| 5.8 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 110 | |
| 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 240 to 420 | |
| 630 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 20 to 22 | |
| 25 |
| Strength to Weight: Bending, points | 19 to 20 | |
| 22 |
| Thermal Diffusivity, mm2/s | 11 | |
| 10 |
| Thermal Shock Resistance, points | 16 to 18 | |
| 20 |
Alloy Composition
| Aluminum (Al), % | 0 to 0.040 | |
| 0 to 0.020 |
| Boron (B), % | 0 | |
| 0.0015 to 0.0070 |
| Carbon (C), % | 0.080 to 0.15 | |
| 0.050 to 0.1 |
| Chromium (Cr), % | 2.0 to 2.5 | |
| 2.2 to 2.6 |
| Copper (Cu), % | 0 to 0.3 | |
| 0 |
| Iron (Fe), % | 94.3 to 96.6 | |
| 94.6 to 96.1 |
| Manganese (Mn), % | 0.4 to 0.8 | |
| 0.3 to 0.7 |
| Molybdenum (Mo), % | 0.9 to 1.1 | |
| 0.9 to 1.1 |
| Nickel (Ni), % | 0 to 0.3 | |
| 0 |
| Nitrogen (N), % | 0 | |
| 0 to 0.010 |
| Phosphorus (P), % | 0 to 0.025 | |
| 0 to 0.020 |
| Silicon (Si), % | 0 to 0.5 | |
| 0.15 to 0.45 |
| Sulfur (S), % | 0 to 0.010 | |
| 0 to 0.010 |
| Titanium (Ti), % | 0 | |
| 0.050 to 0.1 |
| Vanadium (V), % | 0 | |
| 0.2 to 0.3 |