SAE-AISI 4140 Steel vs. S46910 Stainless Steel
Both SAE-AISI 4140 steel and S46910 stainless steel are iron alloys. They have 72% of their average alloy composition in common. There are 27 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.
For each property being compared, the top bar is SAE-AISI 4140 steel and the bottom bar is S46910 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 200 to 310 | |
| 270 to 630 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 200 |
| Elongation at Break, % | 11 to 26 | |
| 2.2 to 11 |
| Fatigue Strength, MPa | 360 to 650 | |
| 250 to 1020 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 73 | |
| 76 |
| Shear Strength, MPa | 410 to 660 | |
| 410 to 1410 |
| Tensile Strength: Ultimate (UTS), MPa | 690 to 1080 | |
| 680 to 2470 |
| Tensile Strength: Yield (Proof), MPa | 590 to 990 | |
| 450 to 2290 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 280 |
| Maximum Temperature: Mechanical, °C | 420 | |
| 810 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1460 |
| Melting Onset (Solidus), °C | 1420 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Expansion, µm/m-K | 13 | |
| 11 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.4 | |
| 18 |
| Density, g/cm3 | 7.8 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 1.5 | |
| 4.1 |
| Embodied Energy, MJ/kg | 20 | |
| 55 |
| Embodied Water, L/kg | 51 | |
| 140 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 74 to 180 | |
| 48 to 130 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 920 to 2590 | |
| 510 to 4780 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 25 to 38 | |
| 24 to 86 |
| Strength to Weight: Bending, points | 22 to 30 | |
| 22 to 51 |
| Thermal Shock Resistance, points | 20 to 32 | |
| 23 to 84 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 0.15 to 0.5 |
| Carbon (C), % | 0.38 to 0.43 | |
| 0 to 0.030 |
| Chromium (Cr), % | 0.8 to 1.1 | |
| 11 to 13 |
| Copper (Cu), % | 0 | |
| 1.5 to 3.5 |
| Iron (Fe), % | 96.8 to 97.8 | |
| 65 to 76 |
| Manganese (Mn), % | 0.75 to 1.0 | |
| 0 to 1.0 |
| Molybdenum (Mo), % | 0.15 to 0.25 | |
| 3.0 to 5.0 |
| Nickel (Ni), % | 0 | |
| 8.0 to 10 |
| Phosphorus (P), % | 0 to 0.035 | |
| 0 to 0.030 |
| Silicon (Si), % | 0.15 to 0.35 | |
| 0 to 0.7 |
| Sulfur (S), % | 0 to 0.040 | |
| 0 to 0.015 |
| Titanium (Ti), % | 0 | |
| 0.5 to 1.2 |