SAE-AISI 4340M Steel vs. EN 1.7380 Steel
Both SAE-AISI 4340M steel and EN 1.7380 steel are iron alloys. They have a very high 96% of their average alloy composition in common. There are 33 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.
For each property being compared, the top bar is SAE-AISI 4340M steel and the bottom bar is EN 1.7380 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 710 | |
| 160 to 170 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 6.0 | |
| 19 to 20 |
| Fatigue Strength, MPa | 690 | |
| 200 to 230 |
| Impact Strength: V-Notched Charpy, J | 18 | |
| 31 to 35 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 72 | |
| 74 |
| Shear Strength, MPa | 1360 | |
| 330 to 350 |
| Tensile Strength: Ultimate (UTS), MPa | 2340 | |
| 540 to 550 |
| Tensile Strength: Yield (Proof), MPa | 1240 | |
| 290 to 330 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 260 |
| Maximum Temperature: Mechanical, °C | 430 | |
| 460 |
| Melting Completion (Liquidus), °C | 1440 | |
| 1470 |
| Melting Onset (Solidus), °C | 1400 | |
| 1430 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 470 |
| Thermal Conductivity, W/m-K | 38 | |
| 39 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.8 | |
| 7.6 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 9.1 | |
| 8.7 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 3.9 | |
| 3.8 |
| Density, g/cm3 | 7.8 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 1.9 | |
| 1.8 |
| Embodied Energy, MJ/kg | 26 | |
| 23 |
| Embodied Water, L/kg | 55 | |
| 59 |
Common Calculations
| PREN (Pitting Resistance) | 2.2 | |
| 5.6 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 120 | |
| 87 to 98 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 4120 | |
| 230 to 280 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 |
| Strength to Weight: Axial, points | 84 | |
| 19 to 20 |
| Strength to Weight: Bending, points | 51 | |
| 19 |
| Thermal Diffusivity, mm2/s | 10 | |
| 11 |
| Thermal Shock Resistance, points | 70 | |
| 15 to 16 |
Alloy Composition
| Carbon (C), % | 0.38 to 0.43 | |
| 0.080 to 0.14 |
| Chromium (Cr), % | 0.7 to 1.0 | |
| 2.0 to 2.5 |
| Copper (Cu), % | 0 | |
| 0 to 0.3 |
| Iron (Fe), % | 93.3 to 94.8 | |
| 94.6 to 96.6 |
| Manganese (Mn), % | 0.65 to 0.9 | |
| 0.4 to 0.8 |
| Molybdenum (Mo), % | 0.35 to 0.45 | |
| 0.9 to 1.1 |
| Nickel (Ni), % | 1.7 to 2.0 | |
| 0 |
| Nitrogen (N), % | 0 | |
| 0 to 0.012 |
| Phosphorus (P), % | 0 to 0.012 | |
| 0 to 0.020 |
| Silicon (Si), % | 1.5 to 1.8 | |
| 0 to 0.5 |
| Sulfur (S), % | 0 to 0.012 | |
| 0 to 0.010 |
| Vanadium (V), % | 0.050 to 0.1 | |
| 0 |