SAE-AISI 4140 Steel vs. EN 1.4107 Stainless Steel
Both SAE-AISI 4140 steel and EN 1.4107 stainless steel are iron alloys. They have 88% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (5, 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 1.4107 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 11 to 26 | |
| 18 to 21 |
| Fatigue Strength, MPa | 360 to 650 | |
| 260 to 350 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 73 | |
| 76 |
| Tensile Strength: Ultimate (UTS), MPa | 690 to 1080 | |
| 620 to 700 |
| Tensile Strength: Yield (Proof), MPa | 590 to 990 | |
| 400 to 570 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 270 |
| Maximum Temperature: Mechanical, °C | 420 | |
| 740 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1450 |
| Melting Onset (Solidus), °C | 1420 | |
| 1410 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 480 |
| Thermal Conductivity, W/m-K | 43 | |
| 27 |
| Thermal Expansion, µm/m-K | 13 | |
| 10 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.3 | |
| 2.9 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.4 | |
| 3.3 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.4 | |
| 7.5 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.5 | |
| 2.1 |
| Embodied Energy, MJ/kg | 20 | |
| 30 |
| Embodied Water, L/kg | 51 | |
| 100 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 74 to 180 | |
| 110 to 120 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 920 to 2590 | |
| 420 to 840 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 24 | |
| 25 |
| Strength to Weight: Axial, points | 25 to 38 | |
| 22 to 25 |
| Strength to Weight: Bending, points | 22 to 30 | |
| 21 to 22 |
| Thermal Diffusivity, mm2/s | 12 | |
| 7.2 |
| Thermal Shock Resistance, points | 20 to 32 | |
| 22 to 25 |
Alloy Composition
| Carbon (C), % | 0.38 to 0.43 | |
| 0 to 0.1 |
| Chromium (Cr), % | 0.8 to 1.1 | |
| 11.5 to 12.5 |
| Copper (Cu), % | 0 | |
| 0 to 0.3 |
| Iron (Fe), % | 96.8 to 97.8 | |
| 83.8 to 87.2 |
| Manganese (Mn), % | 0.75 to 1.0 | |
| 0.5 to 0.8 |
| Molybdenum (Mo), % | 0.15 to 0.25 | |
| 0 to 0.5 |
| Nickel (Ni), % | 0 | |
| 0.8 to 1.5 |
| Phosphorus (P), % | 0 to 0.035 | |
| 0 to 0.030 |
| Silicon (Si), % | 0.15 to 0.35 | |
| 0 to 0.4 |
| Sulfur (S), % | 0 to 0.040 | |
| 0 to 0.020 |
| Vanadium (V), % | 0 | |
| 0 to 0.080 |