AISI 422 Stainless Steel vs. Ductile Cast Iron
Both AISI 422 stainless steel and ductile cast iron are iron alloys. They have 84% of their average alloy composition in common. There are 30 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 422 stainless steel and the bottom bar is ductile cast iron.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 260 to 330 | |
| 160 to 310 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 170 to 180 |
| Elongation at Break, % | 15 to 17 | |
| 2.1 to 20 |
| Poisson's Ratio | 0.28 | |
| 0.28 to 0.31 |
| Shear Modulus, GPa | 76 | |
| 64 to 70 |
| Shear Strength, MPa | 560 to 660 | |
| 420 to 800 |
| Tensile Strength: Ultimate (UTS), MPa | 910 to 1080 | |
| 460 to 920 |
| Tensile Strength: Yield (Proof), MPa | 670 to 870 | |
| 310 to 670 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 270 |
| Maximum Temperature: Mechanical, °C | 650 | |
| 290 |
| Melting Completion (Liquidus), °C | 1480 | |
| 1160 |
| Melting Onset (Solidus), °C | 1470 | |
| 1120 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 490 |
| Thermal Conductivity, W/m-K | 24 | |
| 31 to 36 |
| Thermal Expansion, µm/m-K | 10 | |
| 11 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 4.7 | |
| 7.4 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 5.3 | |
| 8.8 to 9.4 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 11 | |
| 1.9 |
| Density, g/cm3 | 7.9 | |
| 7.1 to 7.5 |
| Embodied Carbon, kg CO2/kg material | 3.1 | |
| 1.5 |
| Embodied Energy, MJ/kg | 44 | |
| 21 |
| Embodied Water, L/kg | 100 | |
| 43 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 140 to 150 | |
| 17 to 80 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1140 to 1910 | |
| 280 to 1330 |
| Stiffness to Weight: Axial, points | 14 | |
| 12 to 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 to 26 |
| Strength to Weight: Axial, points | 32 to 38 | |
| 17 to 35 |
| Strength to Weight: Bending, points | 26 to 30 | |
| 18 to 29 |
| Thermal Diffusivity, mm2/s | 6.4 | |
| 8.9 to 10 |
| Thermal Shock Resistance, points | 33 to 39 | |
| 17 to 35 |
Alloy Composition
| Carbon (C), % | 0.2 to 0.25 | |
| 3.0 to 3.5 |
| Chromium (Cr), % | 11 to 12.5 | |
| 0 |
| Iron (Fe), % | 81.9 to 85.8 | |
| 93.7 to 95.5 |
| Manganese (Mn), % | 0.5 to 1.0 | |
| 0 |
| Molybdenum (Mo), % | 0.9 to 1.3 | |
| 0 |
| Nickel (Ni), % | 0.5 to 1.0 | |
| 0 |
| Phosphorus (P), % | 0 to 0.025 | |
| 0 to 0.080 |
| Silicon (Si), % | 0 to 0.5 | |
| 1.5 to 2.8 |
| Sulfur (S), % | 0 to 0.025 | |
| 0 |
| Tungsten (W), % | 0.9 to 1.3 | |
| 0 |
| Vanadium (V), % | 0.2 to 0.3 | |
| 0 |