AISI 440B Stainless Steel vs. AISI 201 Stainless Steel
Both AISI 440B stainless steel and AISI 201 stainless steel are iron alloys. They have 89% 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 AISI 440B stainless steel and the bottom bar is AISI 201 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 200 |
| Elongation at Break, % | 3.0 to 18 | |
| 4.6 to 51 |
| Fatigue Strength, MPa | 260 to 850 | |
| 280 to 600 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 77 | |
| 77 |
| Shear Strength, MPa | 460 to 1110 | |
| 450 to 840 |
| Tensile Strength: Ultimate (UTS), MPa | 740 to 1930 | |
| 650 to 1450 |
| Tensile Strength: Yield (Proof), MPa | 430 to 1860 | |
| 300 to 1080 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 280 |
| Maximum Temperature: Corrosion, °C | 390 | |
| 410 |
| Maximum Temperature: Mechanical, °C | 870 | |
| 880 |
| Melting Completion (Liquidus), °C | 1480 | |
| 1410 |
| Melting Onset (Solidus), °C | 1370 | |
| 1370 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 480 |
| Thermal Conductivity, W/m-K | 23 | |
| 15 |
| Thermal Expansion, µm/m-K | 10 | |
| 17 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.5 | |
| 2.5 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.9 | |
| 2.9 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 9.0 | |
| 12 |
| Density, g/cm3 | 7.7 | |
| 7.7 |
| Embodied Carbon, kg CO2/kg material | 2.2 | |
| 2.6 |
| Embodied Energy, MJ/kg | 31 | |
| 38 |
| Embodied Water, L/kg | 120 | |
| 140 |
Common Calculations
| PREN (Pitting Resistance) | 18 | |
| 19 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 57 to 110 | |
| 61 to 340 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 27 to 70 | |
| 23 to 52 |
| Strength to Weight: Bending, points | 24 to 45 | |
| 22 to 37 |
| Thermal Diffusivity, mm2/s | 6.1 | |
| 4.0 |
| Thermal Shock Resistance, points | 27 to 70 | |
| 14 to 32 |
Alloy Composition
| Carbon (C), % | 0.75 to 1.0 | |
| 0 to 0.15 |
| Chromium (Cr), % | 16 to 18 | |
| 16 to 18 |
| Iron (Fe), % | 78.2 to 83.3 | |
| 67.5 to 75 |
| Manganese (Mn), % | 0 to 1.0 | |
| 5.5 to 7.5 |
| Molybdenum (Mo), % | 0 to 0.75 | |
| 0 |
| Nickel (Ni), % | 0 | |
| 3.5 to 5.5 |
| Nitrogen (N), % | 0 | |
| 0 to 0.25 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.060 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.030 |