SAE-AISI 4140 Steel vs. EN 1.7335 Steel
Both SAE-AISI 4140 steel and EN 1.7335 steel are iron alloys. Their average alloy composition is basically identical. There are 31 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 4140 steel and the bottom bar is EN 1.7335 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 200 to 310 | |
| 150 to 160 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 11 to 26 | |
| 21 to 22 |
| Fatigue Strength, MPa | 360 to 650 | |
| 200 to 220 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 73 | |
| 73 |
| Shear Strength, MPa | 410 to 660 | |
| 310 to 330 |
| Tensile Strength: Ultimate (UTS), MPa | 690 to 1080 | |
| 500 to 520 |
| Tensile Strength: Yield (Proof), MPa | 590 to 990 | |
| 280 to 310 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 420 | |
| 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 | 43 | |
| 44 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.3 | |
| 7.3 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.4 | |
| 8.4 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.4 | |
| 2.8 |
| Density, g/cm3 | 7.8 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 1.5 | |
| 1.6 |
| Embodied Energy, MJ/kg | 20 | |
| 21 |
| Embodied Water, L/kg | 51 | |
| 52 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 74 to 180 | |
| 91 to 97 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 920 to 2590 | |
| 210 to 260 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 25 to 38 | |
| 18 |
| Strength to Weight: Bending, points | 22 to 30 | |
| 18 |
| Thermal Diffusivity, mm2/s | 12 | |
| 12 |
| Thermal Shock Resistance, points | 20 to 32 | |
| 15 |
Alloy Composition
| Carbon (C), % | 0.38 to 0.43 | |
| 0.080 to 0.18 |
| Chromium (Cr), % | 0.8 to 1.1 | |
| 0.7 to 1.2 |
| Copper (Cu), % | 0 | |
| 0 to 0.3 |
| Iron (Fe), % | 96.8 to 97.8 | |
| 96.4 to 98.4 |
| Manganese (Mn), % | 0.75 to 1.0 | |
| 0.4 to 1.0 |
| Molybdenum (Mo), % | 0.15 to 0.25 | |
| 0.4 to 0.6 |
| Nitrogen (N), % | 0 | |
| 0 to 0.012 |
| Phosphorus (P), % | 0 to 0.035 | |
| 0 to 0.025 |
| Silicon (Si), % | 0.15 to 0.35 | |
| 0 to 0.35 |
| Sulfur (S), % | 0 to 0.040 | |
| 0 to 0.010 |