EN 1.4568 Stainless Steel vs. SAE-AISI 4340M Steel
Both EN 1.4568 stainless steel and SAE-AISI 4340M steel are iron alloys. They have 77% 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 EN 1.4568 stainless steel and the bottom bar is SAE-AISI 4340M steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 190 |
| Elongation at Break, % | 2.3 to 21 | |
| 6.0 |
| Fatigue Strength, MPa | 220 to 670 | |
| 690 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Shear Modulus, GPa | 76 | |
| 72 |
| Shear Strength, MPa | 520 to 930 | |
| 1360 |
| Tensile Strength: Ultimate (UTS), MPa | 830 to 1620 | |
| 2340 |
| Tensile Strength: Yield (Proof), MPa | 330 to 1490 | |
| 1240 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 280 |
| Maximum Temperature: Mechanical, °C | 890 | |
| 430 |
| Melting Completion (Liquidus), °C | 1420 | |
| 1440 |
| Melting Onset (Solidus), °C | 1380 | |
| 1400 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 480 |
| Thermal Conductivity, W/m-K | 16 | |
| 38 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.2 | |
| 7.8 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.5 | |
| 9.1 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 13 | |
| 3.9 |
| Density, g/cm3 | 7.7 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 2.8 | |
| 1.9 |
| Embodied Energy, MJ/kg | 40 | |
| 26 |
| Embodied Water, L/kg | 140 | |
| 55 |
Common Calculations
| PREN (Pitting Resistance) | 17 | |
| 2.2 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 36 to 140 | |
| 120 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 290 to 5710 | |
| 4120 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 30 to 58 | |
| 84 |
| Strength to Weight: Bending, points | 25 to 40 | |
| 51 |
| Thermal Diffusivity, mm2/s | 4.3 | |
| 10 |
| Thermal Shock Resistance, points | 23 to 46 | |
| 70 |
Alloy Composition
| Aluminum (Al), % | 0.7 to 1.5 | |
| 0 |
| Carbon (C), % | 0 to 0.090 | |
| 0.38 to 0.43 |
| Chromium (Cr), % | 16 to 18 | |
| 0.7 to 1.0 |
| Iron (Fe), % | 70.9 to 76.8 | |
| 93.3 to 94.8 |
| Manganese (Mn), % | 0 to 1.0 | |
| 0.65 to 0.9 |
| Molybdenum (Mo), % | 0 | |
| 0.35 to 0.45 |
| Nickel (Ni), % | 6.5 to 7.8 | |
| 1.7 to 2.0 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.012 |
| Silicon (Si), % | 0 to 0.7 | |
| 1.5 to 1.8 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.012 |
| Vanadium (V), % | 0 | |
| 0.050 to 0.1 |