SAE-AISI 4340M Steel vs. EN 1.4310 Stainless Steel
Both SAE-AISI 4340M steel and EN 1.4310 stainless steel are iron alloys. They have 77% 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 1.4310 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 710 | |
| 200 to 270 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 200 |
| Elongation at Break, % | 6.0 | |
| 14 to 45 |
| Fatigue Strength, MPa | 690 | |
| 240 to 330 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 72 | |
| 77 |
| Shear Strength, MPa | 1360 | |
| 510 to 550 |
| Tensile Strength: Ultimate (UTS), MPa | 2340 | |
| 730 to 900 |
| Tensile Strength: Yield (Proof), MPa | 1240 | |
| 260 to 570 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 290 |
| Maximum Temperature: Mechanical, °C | 430 | |
| 910 |
| Melting Completion (Liquidus), °C | 1440 | |
| 1420 |
| Melting Onset (Solidus), °C | 1400 | |
| 1380 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 480 |
| Thermal Conductivity, W/m-K | 38 | |
| 15 |
| Thermal Expansion, µm/m-K | 13 | |
| 18 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.8 | |
| 2.4 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 9.1 | |
| 2.7 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 3.9 | |
| 14 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.9 | |
| 2.9 |
| Embodied Energy, MJ/kg | 26 | |
| 42 |
| Embodied Water, L/kg | 55 | |
| 140 |
Common Calculations
| PREN (Pitting Resistance) | 2.2 | |
| 20 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 120 | |
| 110 to 260 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 4120 | |
| 170 to 830 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 84 | |
| 26 to 32 |
| Strength to Weight: Bending, points | 51 | |
| 23 to 27 |
| Thermal Diffusivity, mm2/s | 10 | |
| 4.0 |
| Thermal Shock Resistance, points | 70 | |
| 15 to 18 |
Alloy Composition
| Carbon (C), % | 0.38 to 0.43 | |
| 0.050 to 0.15 |
| Chromium (Cr), % | 0.7 to 1.0 | |
| 16 to 19 |
| Iron (Fe), % | 93.3 to 94.8 | |
| 66.4 to 78 |
| Manganese (Mn), % | 0.65 to 0.9 | |
| 0 to 2.0 |
| Molybdenum (Mo), % | 0.35 to 0.45 | |
| 0 to 0.8 |
| Nickel (Ni), % | 1.7 to 2.0 | |
| 6.0 to 9.5 |
| Nitrogen (N), % | 0 | |
| 0 to 0.1 |
| Phosphorus (P), % | 0 to 0.012 | |
| 0 to 0.045 |
| Silicon (Si), % | 1.5 to 1.8 | |
| 0 to 2.0 |
| Sulfur (S), % | 0 to 0.012 | |
| 0 to 0.015 |
| Vanadium (V), % | 0.050 to 0.1 | |
| 0 |