Austempered Cast Iron vs. EN 1.6579 Steel
Both austempered cast iron and EN 1.6579 steel are iron alloys. They have a moderately high 94% of their average alloy composition in common. There are 26 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 austempered cast iron and the bottom bar is EN 1.6579 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 270 to 490 | |
| 260 to 290 |
| Elastic (Young's, Tensile) Modulus, GPa | 180 | |
| 190 |
| Elongation at Break, % | 1.1 to 13 | |
| 11 to 14 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 62 to 69 | |
| 73 |
| Tensile Strength: Ultimate (UTS), MPa | 860 to 1800 | |
| 850 to 980 |
| Tensile Strength: Yield (Proof), MPa | 560 to 1460 | |
| 600 to 910 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 250 |
| Melting Completion (Liquidus), °C | 1380 | |
| 1460 |
| Melting Onset (Solidus), °C | 1340 | |
| 1410 |
| Specific Heat Capacity, J/kg-K | 490 | |
| 470 |
| Thermal Conductivity, W/m-K | 42 | |
| 39 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.9 | |
| 3.7 |
| Density, g/cm3 | 7.5 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.8 | |
| 1.7 |
| Embodied Energy, MJ/kg | 25 | |
| 22 |
| Embodied Water, L/kg | 48 | |
| 56 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 19 to 95 | |
| 100 to 120 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 880 to 3970 | |
| 950 to 2210 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 |
| Strength to Weight: Axial, points | 32 to 66 | |
| 30 to 35 |
| Strength to Weight: Bending, points | 27 to 44 | |
| 25 to 28 |
| Thermal Diffusivity, mm2/s | 11 | |
| 11 |
| Thermal Shock Resistance, points | 25 to 53 | |
| 25 to 29 |
Alloy Composition
| Aluminum (Al), % | 0 to 0.050 | |
| 0 |
| Arsenic (As), % | 0 to 0.020 | |
| 0 |
| Carbon (C), % | 3.4 to 3.8 | |
| 0.32 to 0.38 |
| Chromium (Cr), % | 0 to 0.1 | |
| 1.4 to 1.7 |
| Copper (Cu), % | 0 to 0.8 | |
| 0 |
| Iron (Fe), % | 89.6 to 94 | |
| 94.2 to 96.1 |
| Magnesium (Mg), % | 0 to 0.040 | |
| 0 |
| Manganese (Mn), % | 0.3 to 0.4 | |
| 0.6 to 1.0 |
| Molybdenum (Mo), % | 0 to 0.3 | |
| 0.15 to 0.35 |
| Nickel (Ni), % | 0 to 2.0 | |
| 1.4 to 1.7 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.025 |
| Selenium (Se), % | 0 to 0.030 | |
| 0 |
| Silicon (Si), % | 2.3 to 2.7 | |
| 0 to 0.6 |
| Sulfur (S), % | 0 to 0.020 | |
| 0 to 0.030 |
| Tin (Sn), % | 0 to 0.020 | |
| 0 |
| Vanadium (V), % | 0 to 0.1 | |
| 0 |