Austempered Cast Iron vs. Grade N7M Nickel
Austempered cast iron belongs to the iron alloys classification, while grade N7M nickel belongs to the nickel alloys. There are 23 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 austempered cast iron and the bottom bar is grade N7M nickel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 180 | |
| 220 |
| Elongation at Break, % | 1.1 to 13 | |
| 22 |
| Poisson's Ratio | 0.29 | |
| 0.31 |
| Shear Modulus, GPa | 62 to 69 | |
| 85 |
| Tensile Strength: Ultimate (UTS), MPa | 860 to 1800 | |
| 590 |
| Tensile Strength: Yield (Proof), MPa | 560 to 1460 | |
| 310 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 320 |
| Melting Completion (Liquidus), °C | 1380 | |
| 1650 |
| Melting Onset (Solidus), °C | 1340 | |
| 1590 |
| Specific Heat Capacity, J/kg-K | 490 | |
| 390 |
| Thermal Expansion, µm/m-K | 13 | |
| 9.9 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.9 | |
| 75 |
| Density, g/cm3 | 7.5 | |
| 9.3 |
| Embodied Carbon, kg CO2/kg material | 1.8 | |
| 16 |
| Embodied Energy, MJ/kg | 25 | |
| 200 |
| Embodied Water, L/kg | 48 | |
| 270 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 19 to 95 | |
| 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 880 to 3970 | |
| 220 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 22 |
| Strength to Weight: Axial, points | 32 to 66 | |
| 18 |
| Strength to Weight: Bending, points | 27 to 44 | |
| 17 |
| Thermal Shock Resistance, points | 25 to 53 | |
| 19 |
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 | |
| 0 to 1.0 |
| Copper (Cu), % | 0 to 0.8 | |
| 0 |
| Iron (Fe), % | 89.6 to 94 | |
| 0 to 3.0 |
| Magnesium (Mg), % | 0 to 0.040 | |
| 0 |
| Manganese (Mn), % | 0.3 to 0.4 | |
| 0 to 1.0 |
| Molybdenum (Mo), % | 0 to 0.3 | |
| 30 to 33 |
| Nickel (Ni), % | 0 to 2.0 | |
| 60.9 to 70 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.040 |
| 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 0.030 |
| Tin (Sn), % | 0 to 0.020 | |
| 0 |
| Vanadium (V), % | 0 to 0.1 | |
| 0 |