Austempered Cast Iron vs. N08020 Stainless Steel
Both austempered cast iron and N08020 stainless steel are iron alloys. They have a modest 39% of their average alloy composition in common, which, by itself, doesn't mean much. There are 25 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.
For each property being compared, the top bar is austempered cast iron and the bottom bar is N08020 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 180 | |
| 200 |
| Elongation at Break, % | 1.1 to 13 | |
| 15 to 34 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 62 to 69 | |
| 77 |
| Tensile Strength: Ultimate (UTS), MPa | 860 to 1800 | |
| 610 to 620 |
| Tensile Strength: Yield (Proof), MPa | 560 to 1460 | |
| 270 to 420 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 300 |
| Melting Completion (Liquidus), °C | 1380 | |
| 1410 |
| Melting Onset (Solidus), °C | 1340 | |
| 1360 |
| Specific Heat Capacity, J/kg-K | 490 | |
| 460 |
| Thermal Conductivity, W/m-K | 42 | |
| 12 |
| Thermal Expansion, µm/m-K | 13 | |
| 15 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.9 | |
| 38 |
| Density, g/cm3 | 7.5 | |
| 8.2 |
| Embodied Carbon, kg CO2/kg material | 1.8 | |
| 6.6 |
| Embodied Energy, MJ/kg | 25 | |
| 92 |
| Embodied Water, L/kg | 48 | |
| 220 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 19 to 95 | |
| 83 to 170 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 880 to 3970 | |
| 180 to 440 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 |
| Strength to Weight: Axial, points | 32 to 66 | |
| 21 |
| Strength to Weight: Bending, points | 27 to 44 | |
| 20 |
| Thermal Diffusivity, mm2/s | 11 | |
| 3.2 |
| Thermal Shock Resistance, points | 25 to 53 | |
| 15 |
Alloy Composition
| Aluminum (Al), % | 0 to 0.050 | |
| 0 |
| Arsenic (As), % | 0 to 0.020 | |
| 0 |
| Carbon (C), % | 3.4 to 3.8 | |
| 0 to 0.070 |
| Chromium (Cr), % | 0 to 0.1 | |
| 19 to 21 |
| Copper (Cu), % | 0 to 0.8 | |
| 3.0 to 4.0 |
| Iron (Fe), % | 89.6 to 94 | |
| 29.9 to 44 |
| Magnesium (Mg), % | 0 to 0.040 | |
| 0 |
| Manganese (Mn), % | 0.3 to 0.4 | |
| 0 to 2.0 |
| Molybdenum (Mo), % | 0 to 0.3 | |
| 2.0 to 3.0 |
| Nickel (Ni), % | 0 to 2.0 | |
| 32 to 38 |
| Niobium (Nb), % | 0 | |
| 0 to 1.0 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.045 |
| Selenium (Se), % | 0 to 0.030 | |
| 0 |
| Silicon (Si), % | 2.3 to 2.7 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.020 | |
| 0 to 0.035 |
| Tin (Sn), % | 0 to 0.020 | |
| 0 |
| Vanadium (V), % | 0 to 0.1 | |
| 0 |