SAE-AISI 4340M Steel vs. S66286 Stainless Steel
Both SAE-AISI 4340M steel and S66286 stainless steel are iron alloys. They have 59% of their average alloy composition in common. There are 31 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 4340M steel and the bottom bar is S66286 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 6.0 | |
| 17 to 40 |
| Fatigue Strength, MPa | 690 | |
| 240 to 410 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 72 | |
| 75 |
| Shear Strength, MPa | 1360 | |
| 420 to 630 |
| Tensile Strength: Ultimate (UTS), MPa | 2340 | |
| 620 to 1020 |
| Tensile Strength: Yield (Proof), MPa | 1240 | |
| 280 to 670 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 300 |
| Maximum Temperature: Mechanical, °C | 430 | |
| 920 |
| Melting Completion (Liquidus), °C | 1440 | |
| 1430 |
| Melting Onset (Solidus), °C | 1400 | |
| 1370 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 470 |
| Thermal Conductivity, W/m-K | 38 | |
| 15 |
| Thermal Expansion, µm/m-K | 13 | |
| 17 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.8 | |
| 1.9 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 9.1 | |
| 2.2 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 3.9 | |
| 26 |
| Density, g/cm3 | 7.8 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 1.9 | |
| 6.0 |
| Embodied Energy, MJ/kg | 26 | |
| 87 |
| Embodied Water, L/kg | 55 | |
| 170 |
Common Calculations
| PREN (Pitting Resistance) | 2.2 | |
| 19 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 120 | |
| 150 to 200 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 4120 | |
| 190 to 1150 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 |
| Strength to Weight: Axial, points | 84 | |
| 22 to 36 |
| Strength to Weight: Bending, points | 51 | |
| 20 to 28 |
| Thermal Diffusivity, mm2/s | 10 | |
| 4.0 |
| Thermal Shock Resistance, points | 70 | |
| 13 to 22 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 0 to 0.35 |
| Boron (B), % | 0 | |
| 0.0010 to 0.010 |
| Carbon (C), % | 0.38 to 0.43 | |
| 0 to 0.080 |
| Chromium (Cr), % | 0.7 to 1.0 | |
| 13.5 to 16 |
| Iron (Fe), % | 93.3 to 94.8 | |
| 49.1 to 59.5 |
| Manganese (Mn), % | 0.65 to 0.9 | |
| 0 to 2.0 |
| Molybdenum (Mo), % | 0.35 to 0.45 | |
| 1.0 to 1.5 |
| Nickel (Ni), % | 1.7 to 2.0 | |
| 24 to 27 |
| Phosphorus (P), % | 0 to 0.012 | |
| 0 to 0.040 |
| Silicon (Si), % | 1.5 to 1.8 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.012 | |
| 0 to 0.030 |
| Titanium (Ti), % | 0 | |
| 1.9 to 2.4 |
| Vanadium (V), % | 0.050 to 0.1 | |
| 0.1 to 0.5 |