SAE-AISI 4340M Steel vs. EN 1.1191 Steel
Both SAE-AISI 4340M steel and EN 1.1191 steel are iron alloys. They have a very high 96% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (3, 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 1.1191 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 710 | |
| 180 to 200 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 6.0 | |
| 16 to 17 |
| Fatigue Strength, MPa | 690 | |
| 210 to 290 |
| Impact Strength: V-Notched Charpy, J | 18 | |
| 16 to 29 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 72 | |
| 72 |
| Shear Strength, MPa | 1360 | |
| 380 to 430 |
| Tensile Strength: Ultimate (UTS), MPa | 2340 | |
| 630 to 700 |
| Tensile Strength: Yield (Proof), MPa | 1240 | |
| 310 to 440 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 430 | |
| 400 |
| Melting Completion (Liquidus), °C | 1440 | |
| 1460 |
| Melting Onset (Solidus), °C | 1400 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 470 |
| Thermal Conductivity, W/m-K | 38 | |
| 48 |
| Thermal Expansion, µm/m-K | 13 | |
| 12 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.8 | |
| 7.2 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 9.1 | |
| 8.3 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 3.9 | |
| 2.1 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.9 | |
| 1.4 |
| Embodied Energy, MJ/kg | 26 | |
| 19 |
| Embodied Water, L/kg | 55 | |
| 47 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 120 | |
| 83 to 100 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 4120 | |
| 260 to 510 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 |
| Strength to Weight: Axial, points | 84 | |
| 22 to 25 |
| Strength to Weight: Bending, points | 51 | |
| 21 to 22 |
| Thermal Diffusivity, mm2/s | 10 | |
| 13 |
| Thermal Shock Resistance, points | 70 | |
| 20 to 22 |
Alloy Composition
| Carbon (C), % | 0.38 to 0.43 | |
| 0.42 to 0.5 |
| Chromium (Cr), % | 0.7 to 1.0 | |
| 0 to 0.4 |
| Iron (Fe), % | 93.3 to 94.8 | |
| 97.3 to 99.08 |
| Manganese (Mn), % | 0.65 to 0.9 | |
| 0.5 to 0.8 |
| Molybdenum (Mo), % | 0.35 to 0.45 | |
| 0 to 0.1 |
| Nickel (Ni), % | 1.7 to 2.0 | |
| 0 to 0.4 |
| Phosphorus (P), % | 0 to 0.012 | |
| 0 to 0.035 |
| Silicon (Si), % | 1.5 to 1.8 | |
| 0 to 0.4 |
| Sulfur (S), % | 0 to 0.012 | |
| 0 to 0.035 |
| Vanadium (V), % | 0.050 to 0.1 | |
| 0 |