EN 1.4945 Stainless Steel vs. AISI 440B Stainless Steel
Both EN 1.4945 stainless steel and AISI 440B stainless steel are iron alloys. They have 79% 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 1.4945 stainless steel and the bottom bar is AISI 440B stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 200 |
| Elongation at Break, % | 19 to 34 | |
| 3.0 to 18 |
| Fatigue Strength, MPa | 230 to 350 | |
| 260 to 850 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 77 | |
| 77 |
| Shear Strength, MPa | 430 to 460 | |
| 460 to 1110 |
| Tensile Strength: Ultimate (UTS), MPa | 640 to 740 | |
| 740 to 1930 |
| Tensile Strength: Yield (Proof), MPa | 290 to 550 | |
| 430 to 1860 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 280 |
| Maximum Temperature: Corrosion, °C | 520 | |
| 390 |
| Maximum Temperature: Mechanical, °C | 920 | |
| 870 |
| Melting Completion (Liquidus), °C | 1490 | |
| 1480 |
| Melting Onset (Solidus), °C | 1440 | |
| 1370 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 480 |
| Thermal Conductivity, W/m-K | 14 | |
| 23 |
| Thermal Expansion, µm/m-K | 17 | |
| 10 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.9 | |
| 2.5 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 3.2 | |
| 2.9 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 30 | |
| 9.0 |
| Density, g/cm3 | 8.1 | |
| 7.7 |
| Embodied Carbon, kg CO2/kg material | 5.0 | |
| 2.2 |
| Embodied Energy, MJ/kg | 73 | |
| 31 |
| Embodied Water, L/kg | 150 | |
| 120 |
Common Calculations
| PREN (Pitting Resistance) | 23 | |
| 18 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 130 to 180 | |
| 57 to 110 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 24 | |
| 25 |
| Strength to Weight: Axial, points | 22 to 25 | |
| 27 to 70 |
| Strength to Weight: Bending, points | 20 to 22 | |
| 24 to 45 |
| Thermal Diffusivity, mm2/s | 3.7 | |
| 6.1 |
| Thermal Shock Resistance, points | 14 to 16 | |
| 27 to 70 |
Alloy Composition
| Carbon (C), % | 0.040 to 0.1 | |
| 0.75 to 1.0 |
| Chromium (Cr), % | 15.5 to 17.5 | |
| 16 to 18 |
| Iron (Fe), % | 57.9 to 65.7 | |
| 78.2 to 83.3 |
| Manganese (Mn), % | 0 to 1.5 | |
| 0 to 1.0 |
| Molybdenum (Mo), % | 0 | |
| 0 to 0.75 |
| Nickel (Ni), % | 15.5 to 17.5 | |
| 0 |
| Niobium (Nb), % | 0.4 to 1.2 | |
| 0 |
| Nitrogen (N), % | 0.060 to 0.14 | |
| 0 |
| Phosphorus (P), % | 0 to 0.035 | |
| 0 to 0.040 |
| Silicon (Si), % | 0.3 to 0.6 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.015 |
| Tungsten (W), % | 2.5 to 3.5 | |
| 0 |