EN 1.4640 Stainless Steel vs. SAE-AISI 4320 Steel
Both EN 1.4640 stainless steel and SAE-AISI 4320 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 (2, in this case) are not shown.
For each property being compared, the top bar is EN 1.4640 stainless steel and the bottom bar is SAE-AISI 4320 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 190 to 200 | |
| 160 to 240 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 190 |
| Elongation at Break, % | 51 | |
| 21 to 29 |
| Fatigue Strength, MPa | 230 to 250 | |
| 320 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Shear Modulus, GPa | 77 | |
| 73 |
| Shear Strength, MPa | 440 to 460 | |
| 370 to 500 |
| Tensile Strength: Ultimate (UTS), MPa | 620 to 650 | |
| 570 to 790 |
| Tensile Strength: Yield (Proof), MPa | 240 to 260 | |
| 430 to 460 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 930 | |
| 420 |
| Melting Completion (Liquidus), °C | 1420 | |
| 1460 |
| Melting Onset (Solidus), °C | 1380 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 470 |
| Thermal Conductivity, W/m-K | 15 | |
| 46 |
| Thermal Expansion, µm/m-K | 16 | |
| 11 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.4 | |
| 7.4 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.7 | |
| 8.5 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 14 | |
| 3.4 |
| Density, g/cm3 | 7.8 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 2.8 | |
| 1.7 |
| Embodied Energy, MJ/kg | 40 | |
| 22 |
| Embodied Water, L/kg | 150 | |
| 52 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 250 to 260 | |
| 140 to 150 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 150 to 170 | |
| 480 to 560 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 |
| Strength to Weight: Axial, points | 22 to 23 | |
| 20 to 28 |
| Strength to Weight: Bending, points | 21 | |
| 19 to 24 |
| Thermal Diffusivity, mm2/s | 4.0 | |
| 13 |
| Thermal Shock Resistance, points | 14 to 15 | |
| 19 to 27 |
Alloy Composition
| Carbon (C), % | 0.030 to 0.080 | |
| 0.17 to 0.22 |
| Chromium (Cr), % | 18 to 19 | |
| 0.4 to 0.6 |
| Copper (Cu), % | 1.3 to 2.0 | |
| 0 |
| Iron (Fe), % | 67.4 to 73.6 | |
| 95.8 to 97 |
| Manganese (Mn), % | 1.5 to 4.0 | |
| 0.45 to 0.65 |
| Molybdenum (Mo), % | 0 | |
| 0.2 to 0.3 |
| Nickel (Ni), % | 5.5 to 6.9 | |
| 1.7 to 2.0 |
| Nitrogen (N), % | 0.030 to 0.11 | |
| 0 |
| Phosphorus (P), % | 0 to 0.045 | |
| 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 |