SAE-AISI 4340M Steel vs. EN 1.4935 Stainless Steel
Both SAE-AISI 4340M steel and EN 1.4935 stainless steel are iron alloys. They have 88% 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 EN 1.4935 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 200 |
| Elongation at Break, % | 6.0 | |
| 16 to 18 |
| Fatigue Strength, MPa | 690 | |
| 350 to 400 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 72 | |
| 76 |
| Shear Strength, MPa | 1360 | |
| 480 to 540 |
| Tensile Strength: Ultimate (UTS), MPa | 2340 | |
| 780 to 880 |
| Tensile Strength: Yield (Proof), MPa | 1240 | |
| 570 to 670 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 270 |
| Maximum Temperature: Mechanical, °C | 430 | |
| 740 |
| Melting Completion (Liquidus), °C | 1440 | |
| 1460 |
| Melting Onset (Solidus), °C | 1400 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 470 |
| Thermal Conductivity, W/m-K | 38 | |
| 24 |
| Thermal Expansion, µm/m-K | 13 | |
| 11 |
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 | |
| 9.0 |
| 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 | |
| 100 |
Common Calculations
| PREN (Pitting Resistance) | 2.2 | |
| 16 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 120 | |
| 130 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 4120 | |
| 830 to 1160 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 84 | |
| 28 to 31 |
| Strength to Weight: Bending, points | 51 | |
| 24 to 26 |
| Thermal Diffusivity, mm2/s | 10 | |
| 6.5 |
| Thermal Shock Resistance, points | 70 | |
| 27 to 30 |
Alloy Composition
| Carbon (C), % | 0.38 to 0.43 | |
| 0.17 to 0.24 |
| Chromium (Cr), % | 0.7 to 1.0 | |
| 11 to 12.5 |
| Iron (Fe), % | 93.3 to 94.8 | |
| 83 to 86.7 |
| Manganese (Mn), % | 0.65 to 0.9 | |
| 0.3 to 0.8 |
| Molybdenum (Mo), % | 0.35 to 0.45 | |
| 0.8 to 1.2 |
| Nickel (Ni), % | 1.7 to 2.0 | |
| 0.3 to 0.8 |
| Phosphorus (P), % | 0 to 0.012 | |
| 0 to 0.025 |
| Silicon (Si), % | 1.5 to 1.8 | |
| 0.1 to 0.5 |
| Sulfur (S), % | 0 to 0.012 | |
| 0 to 0.015 |
| Tungsten (W), % | 0 | |
| 0.4 to 0.6 |
| Vanadium (V), % | 0.050 to 0.1 | |
| 0.2 to 0.35 |