SAE-AISI 4340M Steel vs. SAE-AISI 1086 Steel
Both SAE-AISI 4340M steel and SAE-AISI 1086 steel are iron alloys. They have a moderately high 95% 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 SAE-AISI 1086 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 710 | |
| 220 to 260 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 6.0 | |
| 11 |
| Fatigue Strength, MPa | 690 | |
| 300 to 360 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 72 | |
| 72 |
| Shear Strength, MPa | 1360 | |
| 450 to 520 |
| Tensile Strength: Ultimate (UTS), MPa | 2340 | |
| 760 to 870 |
| Tensile Strength: Yield (Proof), MPa | 1240 | |
| 480 to 580 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 240 |
| Maximum Temperature: Mechanical, °C | 430 | |
| 400 |
| Melting Completion (Liquidus), °C | 1440 | |
| 1460 |
| Melting Onset (Solidus), °C | 1400 | |
| 1410 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 470 |
| Thermal Conductivity, W/m-K | 38 | |
| 50 |
| Thermal Expansion, µm/m-K | 13 | |
| 11 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.8 | |
| 7.0 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 9.1 | |
| 8.1 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 3.9 | |
| 1.8 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.9 | |
| 1.4 |
| Embodied Energy, MJ/kg | 26 | |
| 19 |
| Embodied Water, L/kg | 55 | |
| 45 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 120 | |
| 79 to 84 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 4120 | |
| 610 to 890 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 |
| Strength to Weight: Axial, points | 84 | |
| 27 to 31 |
| Strength to Weight: Bending, points | 51 | |
| 24 to 26 |
| Thermal Diffusivity, mm2/s | 10 | |
| 14 |
| Thermal Shock Resistance, points | 70 | |
| 26 to 30 |
Alloy Composition
| Carbon (C), % | 0.38 to 0.43 | |
| 0.8 to 0.93 |
| Chromium (Cr), % | 0.7 to 1.0 | |
| 0 |
| Iron (Fe), % | 93.3 to 94.8 | |
| 98.5 to 98.9 |
| Manganese (Mn), % | 0.65 to 0.9 | |
| 0.3 to 0.5 |
| Molybdenum (Mo), % | 0.35 to 0.45 | |
| 0 |
| Nickel (Ni), % | 1.7 to 2.0 | |
| 0 |
| Phosphorus (P), % | 0 to 0.012 | |
| 0 to 0.040 |
| Silicon (Si), % | 1.5 to 1.8 | |
| 0 |
| Sulfur (S), % | 0 to 0.012 | |
| 0 to 0.050 |
| Vanadium (V), % | 0.050 to 0.1 | |
| 0 |