SAE-AISI 4340M Steel vs. EN 1.4313 Stainless Steel
Both SAE-AISI 4340M steel and EN 1.4313 stainless steel are iron alloys. They have 86% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.
For each property being compared, the top bar is SAE-AISI 4340M steel and the bottom bar is EN 1.4313 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 200 |
| Elongation at Break, % | 6.0 | |
| 12 to 17 |
| Fatigue Strength, MPa | 690 | |
| 340 to 510 |
| Impact Strength: V-Notched Charpy, J | 18 | |
| 55 to 70 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 72 | |
| 76 |
| Shear Strength, MPa | 1360 | |
| 460 to 600 |
| Tensile Strength: Ultimate (UTS), MPa | 2340 | |
| 750 to 1000 |
| Tensile Strength: Yield (Proof), MPa | 1240 | |
| 580 to 910 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 280 |
| Maximum Temperature: Mechanical, °C | 430 | |
| 780 |
| Melting Completion (Liquidus), °C | 1440 | |
| 1450 |
| Melting Onset (Solidus), °C | 1400 | |
| 1400 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 480 |
| Thermal Conductivity, W/m-K | 38 | |
| 25 |
| Thermal Expansion, µm/m-K | 13 | |
| 10 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.8 | |
| 2.9 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 9.1 | |
| 3.3 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 3.9 | |
| 10 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.9 | |
| 2.4 |
| Embodied Energy, MJ/kg | 26 | |
| 34 |
| Embodied Water, L/kg | 55 | |
| 110 |
Common Calculations
| PREN (Pitting Resistance) | 2.2 | |
| 15 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 120 | |
| 110 to 150 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 4120 | |
| 870 to 2100 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 84 | |
| 27 to 36 |
| Strength to Weight: Bending, points | 51 | |
| 23 to 28 |
| Thermal Diffusivity, mm2/s | 10 | |
| 6.7 |
| Thermal Shock Resistance, points | 70 | |
| 27 to 36 |
Alloy Composition
| Carbon (C), % | 0.38 to 0.43 | |
| 0 to 0.050 |
| Chromium (Cr), % | 0.7 to 1.0 | |
| 12 to 14 |
| Iron (Fe), % | 93.3 to 94.8 | |
| 78.5 to 84.2 |
| Manganese (Mn), % | 0.65 to 0.9 | |
| 0 to 1.5 |
| Molybdenum (Mo), % | 0.35 to 0.45 | |
| 0.3 to 0.7 |
| Nickel (Ni), % | 1.7 to 2.0 | |
| 3.5 to 4.5 |
| Nitrogen (N), % | 0 | |
| 0 to 0.020 |
| Phosphorus (P), % | 0 to 0.012 | |
| 0 to 0.040 |
| Silicon (Si), % | 1.5 to 1.8 | |
| 0 to 0.7 |
| Sulfur (S), % | 0 to 0.012 | |
| 0 to 0.015 |
| Vanadium (V), % | 0.050 to 0.1 | |
| 0 |