EN 1.4923 Stainless Steel vs. SAE-AISI 4340 Steel
Both EN 1.4923 stainless steel and SAE-AISI 4340 steel are iron alloys. They have 88% of their average alloy composition in common. There are 30 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 EN 1.4923 stainless steel and the bottom bar is SAE-AISI 4340 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 12 to 21 | |
| 12 to 22 |
| Fatigue Strength, MPa | 300 to 440 | |
| 330 to 740 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Shear Modulus, GPa | 76 | |
| 73 |
| Shear Strength, MPa | 540 to 590 | |
| 430 to 770 |
| Tensile Strength: Ultimate (UTS), MPa | 870 to 980 | |
| 690 to 1280 |
| Tensile Strength: Yield (Proof), MPa | 470 to 780 | |
| 470 to 1150 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 740 | |
| 430 |
| Melting Completion (Liquidus), °C | 1450 | |
| 1460 |
| Melting Onset (Solidus), °C | 1410 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 470 |
| Thermal Conductivity, W/m-K | 24 | |
| 44 |
| Thermal Expansion, µm/m-K | 11 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.9 | |
| 7.5 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 3.3 | |
| 8.6 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 8.0 | |
| 3.5 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 2.9 | |
| 1.7 |
| Embodied Energy, MJ/kg | 41 | |
| 22 |
| Embodied Water, L/kg | 100 | |
| 53 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 110 to 150 | |
| 79 to 170 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 570 to 1580 | |
| 590 to 3490 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 |
| Strength to Weight: Axial, points | 31 to 35 | |
| 24 to 45 |
| Strength to Weight: Bending, points | 26 to 28 | |
| 22 to 33 |
| Thermal Diffusivity, mm2/s | 6.5 | |
| 12 |
| Thermal Shock Resistance, points | 30 to 34 | |
| 20 to 38 |
Alloy Composition
| Carbon (C), % | 0.18 to 0.24 | |
| 0.38 to 0.43 |
| Chromium (Cr), % | 11 to 12.5 | |
| 0.7 to 0.9 |
| Iron (Fe), % | 83.5 to 87.1 | |
| 95.1 to 96.3 |
| Manganese (Mn), % | 0.4 to 0.9 | |
| 0.6 to 0.8 |
| Molybdenum (Mo), % | 0.8 to 1.2 | |
| 0.2 to 0.3 |
| Nickel (Ni), % | 0.3 to 0.8 | |
| 1.7 to 2.0 |
| Phosphorus (P), % | 0 to 0.025 | |
| 0 to 0.035 |
| Silicon (Si), % | 0 to 0.5 | |
| 0.15 to 0.35 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.040 |
| Vanadium (V), % | 0.25 to 0.35 | |
| 0 |