AISI 440A Stainless Steel vs. S20910 Stainless Steel
Both AISI 440A stainless steel and S20910 stainless steel are iron alloys. They have 75% 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 AISI 440A stainless steel and the bottom bar is S20910 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 200 |
| Elongation at Break, % | 5.0 to 20 | |
| 14 to 39 |
| Fatigue Strength, MPa | 270 to 790 | |
| 310 to 460 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 77 | |
| 79 |
| Shear Strength, MPa | 450 to 1040 | |
| 500 to 570 |
| Tensile Strength: Ultimate (UTS), MPa | 730 to 1790 | |
| 780 to 940 |
| Tensile Strength: Yield (Proof), MPa | 420 to 1650 | |
| 430 to 810 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 300 |
| Maximum Temperature: Corrosion, °C | 400 | |
| 460 |
| Maximum Temperature: Mechanical, °C | 760 | |
| 1080 |
| Melting Completion (Liquidus), °C | 1480 | |
| 1420 |
| Melting Onset (Solidus), °C | 1370 | |
| 1380 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 480 |
| Thermal Conductivity, W/m-K | 23 | |
| 13 |
| Thermal Expansion, µm/m-K | 10 | |
| 16 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 9.0 | |
| 22 |
| Density, g/cm3 | 7.7 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 2.2 | |
| 4.8 |
| Embodied Energy, MJ/kg | 31 | |
| 68 |
| Embodied Water, L/kg | 120 | |
| 180 |
Common Calculations
| PREN (Pitting Resistance) | 18 | |
| 34 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 87 to 120 | |
| 120 to 260 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 26 to 65 | |
| 28 to 33 |
| Strength to Weight: Bending, points | 23 to 43 | |
| 24 to 27 |
| Thermal Diffusivity, mm2/s | 6.2 | |
| 3.6 |
| Thermal Shock Resistance, points | 26 to 65 | |
| 17 to 21 |
Alloy Composition
| Carbon (C), % | 0.6 to 0.75 | |
| 0 to 0.060 |
| Chromium (Cr), % | 16 to 18 | |
| 20.5 to 23.5 |
| Iron (Fe), % | 78.4 to 83.4 | |
| 52.1 to 62.1 |
| Manganese (Mn), % | 0 to 1.0 | |
| 4.0 to 6.0 |
| Molybdenum (Mo), % | 0 to 0.75 | |
| 1.5 to 3.0 |
| Nickel (Ni), % | 0 | |
| 11.5 to 13.5 |
| Niobium (Nb), % | 0 | |
| 0.1 to 0.3 |
| Nitrogen (N), % | 0 | |
| 0.2 to 0.4 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 0.75 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.030 |
| Vanadium (V), % | 0 | |
| 0.1 to 0.3 |