EN 1.4301 Stainless Steel vs. SAE-AISI 4340 Steel
Both EN 1.4301 stainless steel and SAE-AISI 4340 steel are iron alloys. They have 74% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.
For each property being compared, the top bar is EN 1.4301 stainless steel and the bottom bar is SAE-AISI 4340 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 190 to 270 | |
| 210 to 360 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 190 |
| Elongation at Break, % | 14 to 46 | |
| 12 to 22 |
| Fatigue Strength, MPa | 200 to 330 | |
| 330 to 740 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Shear Modulus, GPa | 77 | |
| 73 |
| Shear Strength, MPa | 430 to 550 | |
| 430 to 770 |
| Tensile Strength: Ultimate (UTS), MPa | 610 to 900 | |
| 690 to 1280 |
| Tensile Strength: Yield (Proof), MPa | 220 to 570 | |
| 470 to 1150 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 940 | |
| 430 |
| Melting Completion (Liquidus), °C | 1430 | |
| 1460 |
| Melting Onset (Solidus), °C | 1380 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 470 |
| Thermal Conductivity, W/m-K | 15 | |
| 44 |
| Thermal Expansion, µm/m-K | 16 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.4 | |
| 7.5 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.7 | |
| 8.6 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 15 | |
| 3.5 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 3.0 | |
| 1.7 |
| Embodied Energy, MJ/kg | 43 | |
| 22 |
| Embodied Water, L/kg | 140 | |
| 53 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 110 to 220 | |
| 79 to 170 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 120 to 820 | |
| 590 to 3490 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 |
| Strength to Weight: Axial, points | 22 to 32 | |
| 24 to 45 |
| Strength to Weight: Bending, points | 20 to 27 | |
| 22 to 33 |
| Thermal Diffusivity, mm2/s | 4.0 | |
| 12 |
| Thermal Shock Resistance, points | 14 to 20 | |
| 20 to 38 |
Alloy Composition
| Carbon (C), % | 0 to 0.070 | |
| 0.38 to 0.43 |
| Chromium (Cr), % | 17.5 to 19.5 | |
| 0.7 to 0.9 |
| Iron (Fe), % | 66.8 to 74.5 | |
| 95.1 to 96.3 |
| Manganese (Mn), % | 0 to 2.0 | |
| 0.6 to 0.8 |
| Molybdenum (Mo), % | 0 | |
| 0.2 to 0.3 |
| Nickel (Ni), % | 8.0 to 10.5 | |
| 1.7 to 2.0 |
| Nitrogen (N), % | 0 to 0.1 | |
| 0 |
| Phosphorus (P), % | 0 to 0.045 | |
| 0 to 0.035 |
| Silicon (Si), % | 0 to 1.0 | |
| 0.15 to 0.35 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.040 |