EN 1.6771 Steel vs. AISI 440B Stainless Steel
Both EN 1.6771 steel and AISI 440B stainless steel are iron alloys. They have 83% of their average alloy composition in common. There are 29 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 1.6771 steel and the bottom bar is AISI 440B stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 200 |
| Elongation at Break, % | 8.0 to 8.7 | |
| 3.0 to 18 |
| Fatigue Strength, MPa | 440 to 680 | |
| 260 to 850 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 73 | |
| 77 |
| Tensile Strength: Ultimate (UTS), MPa | 930 to 1180 | |
| 740 to 1930 |
| Tensile Strength: Yield (Proof), MPa | 740 to 1140 | |
| 430 to 1860 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 280 |
| Maximum Temperature: Mechanical, °C | 440 | |
| 870 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1480 |
| Melting Onset (Solidus), °C | 1420 | |
| 1370 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 480 |
| Thermal Conductivity, W/m-K | 46 | |
| 23 |
| Thermal Expansion, µm/m-K | 13 | |
| 10 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 8.0 | |
| 2.5 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 9.2 | |
| 2.9 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 5.0 | |
| 9.0 |
| Density, g/cm3 | 7.9 | |
| 7.7 |
| Embodied Carbon, kg CO2/kg material | 1.9 | |
| 2.2 |
| Embodied Energy, MJ/kg | 25 | |
| 31 |
| Embodied Water, L/kg | 58 | |
| 120 |
Common Calculations
| PREN (Pitting Resistance) | 2.5 | |
| 18 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 75 to 93 | |
| 57 to 110 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 24 | |
| 25 |
| Strength to Weight: Axial, points | 33 to 41 | |
| 27 to 70 |
| Strength to Weight: Bending, points | 27 to 31 | |
| 24 to 45 |
| Thermal Diffusivity, mm2/s | 13 | |
| 6.1 |
| Thermal Shock Resistance, points | 27 to 35 | |
| 27 to 70 |
Alloy Composition
| Carbon (C), % | 0.27 to 0.33 | |
| 0.75 to 1.0 |
| Chromium (Cr), % | 0.8 to 1.2 | |
| 16 to 18 |
| Iron (Fe), % | 92.2 to 95 | |
| 78.2 to 83.3 |
| Manganese (Mn), % | 0.6 to 1.0 | |
| 0 to 1.0 |
| Molybdenum (Mo), % | 0.3 to 0.6 | |
| 0 to 0.75 |
| Nickel (Ni), % | 3.0 to 4.0 | |
| 0 |
| Phosphorus (P), % | 0 to 0.030 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 0.6 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.020 | |
| 0 to 0.015 |