AISI 440A Stainless Steel vs. Ductile Cast Iron
Both AISI 440A stainless steel and ductile cast iron are iron alloys. They have 82% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.
For each property being compared, the top bar is AISI 440A stainless steel and the bottom bar is ductile cast iron.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 170 to 180 |
| Elongation at Break, % | 5.0 to 20 | |
| 2.1 to 20 |
| Poisson's Ratio | 0.28 | |
| 0.28 to 0.31 |
| Shear Modulus, GPa | 77 | |
| 64 to 70 |
| Shear Strength, MPa | 450 to 1040 | |
| 420 to 800 |
| Tensile Strength: Ultimate (UTS), MPa | 730 to 1790 | |
| 460 to 920 |
| Tensile Strength: Yield (Proof), MPa | 420 to 1650 | |
| 310 to 670 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 270 |
| Maximum Temperature: Mechanical, °C | 760 | |
| 290 |
| Melting Completion (Liquidus), °C | 1480 | |
| 1160 |
| Melting Onset (Solidus), °C | 1370 | |
| 1120 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 490 |
| Thermal Conductivity, W/m-K | 23 | |
| 31 to 36 |
| Thermal Expansion, µm/m-K | 10 | |
| 11 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.5 | |
| 7.4 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.9 | |
| 8.8 to 9.4 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 9.0 | |
| 1.9 |
| Density, g/cm3 | 7.7 | |
| 7.1 to 7.5 |
| Embodied Carbon, kg CO2/kg material | 2.2 | |
| 1.5 |
| Embodied Energy, MJ/kg | 31 | |
| 21 |
| Embodied Water, L/kg | 120 | |
| 43 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 87 to 120 | |
| 17 to 80 |
| Stiffness to Weight: Axial, points | 14 | |
| 12 to 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 to 26 |
| Strength to Weight: Axial, points | 26 to 65 | |
| 17 to 35 |
| Strength to Weight: Bending, points | 23 to 43 | |
| 18 to 29 |
| Thermal Diffusivity, mm2/s | 6.2 | |
| 8.9 to 10 |
| Thermal Shock Resistance, points | 26 to 65 | |
| 17 to 35 |
Alloy Composition
| Carbon (C), % | 0.6 to 0.75 | |
| 3.0 to 3.5 |
| Chromium (Cr), % | 16 to 18 | |
| 0 |
| Iron (Fe), % | 78.4 to 83.4 | |
| 93.7 to 95.5 |
| Manganese (Mn), % | 0 to 1.0 | |
| 0 |
| Molybdenum (Mo), % | 0 to 0.75 | |
| 0 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.080 |
| Silicon (Si), % | 0 to 1.0 | |
| 1.5 to 2.8 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 |