EN 1.4640 Stainless Steel vs. AISI 440A Stainless Steel
Both EN 1.4640 stainless steel and AISI 440A 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 (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 AISI 440A stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 200 |
| Elongation at Break, % | 51 | |
| 5.0 to 20 |
| Fatigue Strength, MPa | 230 to 250 | |
| 270 to 790 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 77 | |
| 77 |
| Shear Strength, MPa | 440 to 460 | |
| 450 to 1040 |
| Tensile Strength: Ultimate (UTS), MPa | 620 to 650 | |
| 730 to 1790 |
| Tensile Strength: Yield (Proof), MPa | 240 to 260 | |
| 420 to 1650 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 280 |
| Maximum Temperature: Corrosion, °C | 420 | |
| 400 |
| Maximum Temperature: Mechanical, °C | 930 | |
| 760 |
| Melting Completion (Liquidus), °C | 1420 | |
| 1480 |
| Melting Onset (Solidus), °C | 1380 | |
| 1370 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 480 |
| Thermal Conductivity, W/m-K | 15 | |
| 23 |
| Thermal Expansion, µm/m-K | 16 | |
| 10 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.4 | |
| 2.5 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.7 | |
| 2.9 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 14 | |
| 9.0 |
| Density, g/cm3 | 7.8 | |
| 7.7 |
| Embodied Carbon, kg CO2/kg material | 2.8 | |
| 2.2 |
| Embodied Energy, MJ/kg | 40 | |
| 31 |
| Embodied Water, L/kg | 150 | |
| 120 |
Common Calculations
| PREN (Pitting Resistance) | 20 | |
| 18 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 250 to 260 | |
| 87 to 120 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 22 to 23 | |
| 26 to 65 |
| Strength to Weight: Bending, points | 21 | |
| 23 to 43 |
| Thermal Diffusivity, mm2/s | 4.0 | |
| 6.2 |
| Thermal Shock Resistance, points | 14 to 15 | |
| 26 to 65 |
Alloy Composition
| Carbon (C), % | 0.030 to 0.080 | |
| 0.6 to 0.75 |
| Chromium (Cr), % | 18 to 19 | |
| 16 to 18 |
| Copper (Cu), % | 1.3 to 2.0 | |
| 0 |
| Iron (Fe), % | 67.4 to 73.6 | |
| 78.4 to 83.4 |
| Manganese (Mn), % | 1.5 to 4.0 | |
| 0 to 1.0 |
| Molybdenum (Mo), % | 0 | |
| 0 to 0.75 |
| Nickel (Ni), % | 5.5 to 6.9 | |
| 0 |
| Nitrogen (N), % | 0.030 to 0.11 | |
| 0 |
| Phosphorus (P), % | 0 to 0.045 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 0.5 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.015 |