Austempered Cast Iron vs. ZA-8
Austempered cast iron belongs to the iron alloys classification, while ZA-8 belongs to the zinc alloys. There are 26 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.
For each property being compared, the top bar is austempered cast iron and the bottom bar is ZA-8.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 270 to 490 | |
| 87 to 100 |
| Elastic (Young's, Tensile) Modulus, GPa | 180 | |
| 85 to 86 |
| Elongation at Break, % | 1.1 to 13 | |
| 1.3 to 8.0 |
| Poisson's Ratio | 0.29 | |
| 0.26 |
| Shear Modulus, GPa | 62 to 69 | |
| 34 |
| Tensile Strength: Ultimate (UTS), MPa | 860 to 1800 | |
| 210 to 370 |
| Tensile Strength: Yield (Proof), MPa | 560 to 1460 | |
| 210 to 290 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 110 |
| Melting Completion (Liquidus), °C | 1380 | |
| 400 |
| Melting Onset (Solidus), °C | 1340 | |
| 380 |
| Specific Heat Capacity, J/kg-K | 490 | |
| 440 |
| Thermal Conductivity, W/m-K | 42 | |
| 120 |
| Thermal Expansion, µm/m-K | 13 | |
| 23 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.9 | |
| 11 |
| Density, g/cm3 | 7.5 | |
| 6.3 |
| Embodied Carbon, kg CO2/kg material | 1.8 | |
| 3.3 |
| Embodied Energy, MJ/kg | 25 | |
| 62 |
| Embodied Water, L/kg | 48 | |
| 420 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 19 to 95 | |
| 2.8 to 28 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 880 to 3970 | |
| 260 to 490 |
| Stiffness to Weight: Axial, points | 13 | |
| 7.5 |
| Stiffness to Weight: Bending, points | 25 | |
| 23 |
| Strength to Weight: Axial, points | 32 to 66 | |
| 9.3 to 17 |
| Strength to Weight: Bending, points | 27 to 44 | |
| 12 to 18 |
| Thermal Diffusivity, mm2/s | 11 | |
| 42 |
| Thermal Shock Resistance, points | 25 to 53 | |
| 7.6 to 13 |
Alloy Composition
| Aluminum (Al), % | 0 to 0.050 | |
| 8.0 to 8.8 |
| Arsenic (As), % | 0 to 0.020 | |
| 0 |
| Cadmium (Cd), % | 0 | |
| 0 to 0.0060 |
| Carbon (C), % | 3.4 to 3.8 | |
| 0 |
| Chromium (Cr), % | 0 to 0.1 | |
| 0 |
| Copper (Cu), % | 0 to 0.8 | |
| 0.8 to 1.3 |
| Iron (Fe), % | 89.6 to 94 | |
| 0 to 0.075 |
| Lead (Pb), % | 0 | |
| 0 to 0.0060 |
| Magnesium (Mg), % | 0 to 0.040 | |
| 0.015 to 0.030 |
| Manganese (Mn), % | 0.3 to 0.4 | |
| 0 |
| Molybdenum (Mo), % | 0 to 0.3 | |
| 0 |
| Nickel (Ni), % | 0 to 2.0 | |
| 0 to 0.020 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 |
| Selenium (Se), % | 0 to 0.030 | |
| 0 |
| Silicon (Si), % | 2.3 to 2.7 | |
| 0 to 0.045 |
| Sulfur (S), % | 0 to 0.020 | |
| 0 |
| Tin (Sn), % | 0 to 0.020 | |
| 0 to 0.0030 |
| Vanadium (V), % | 0 to 0.1 | |
| 0 |
| Zinc (Zn), % | 0 | |
| 89.7 to 91.2 |