EN 1.4104 Stainless Steel vs. SAE-AISI 4140 Steel
Both EN 1.4104 stainless steel and SAE-AISI 4140 steel are iron alloys. They have 84% of their average alloy composition in common. There are 30 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 EN 1.4104 stainless steel and the bottom bar is SAE-AISI 4140 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 190 |
| Elongation at Break, % | 11 to 23 | |
| 11 to 26 |
| Fatigue Strength, MPa | 230 to 310 | |
| 360 to 650 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Shear Modulus, GPa | 77 | |
| 73 |
| Shear Strength, MPa | 400 to 450 | |
| 410 to 660 |
| Tensile Strength: Ultimate (UTS), MPa | 630 to 750 | |
| 690 to 1080 |
| Tensile Strength: Yield (Proof), MPa | 350 to 560 | |
| 590 to 990 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 860 | |
| 420 |
| Melting Completion (Liquidus), °C | 1440 | |
| 1460 |
| Melting Onset (Solidus), °C | 1390 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 470 |
| Thermal Conductivity, W/m-K | 25 | |
| 43 |
| Thermal Expansion, µm/m-K | 10 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.5 | |
| 7.3 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.9 | |
| 8.4 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 8.5 | |
| 2.4 |
| Density, g/cm3 | 7.7 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 2.2 | |
| 1.5 |
| Embodied Energy, MJ/kg | 30 | |
| 20 |
| Embodied Water, L/kg | 120 | |
| 51 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 77 to 120 | |
| 74 to 180 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 310 to 800 | |
| 920 to 2590 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 |
| Strength to Weight: Axial, points | 23 to 27 | |
| 25 to 38 |
| Strength to Weight: Bending, points | 21 to 24 | |
| 22 to 30 |
| Thermal Diffusivity, mm2/s | 6.7 | |
| 12 |
| Thermal Shock Resistance, points | 22 to 27 | |
| 20 to 32 |
Alloy Composition
| Carbon (C), % | 0.1 to 0.17 | |
| 0.38 to 0.43 |
| Chromium (Cr), % | 15.5 to 17.5 | |
| 0.8 to 1.1 |
| Iron (Fe), % | 78.8 to 84.1 | |
| 96.8 to 97.8 |
| Manganese (Mn), % | 0 to 1.5 | |
| 0.75 to 1.0 |
| Molybdenum (Mo), % | 0.2 to 0.6 | |
| 0.15 to 0.25 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.035 |
| Silicon (Si), % | 0 to 1.0 | |
| 0.15 to 0.35 |
| Sulfur (S), % | 0.15 to 0.35 | |
| 0 to 0.040 |