Automotive Malleable Cast Iron vs. ISO-WD21150 Magnesium
Automotive malleable cast iron belongs to the iron alloys classification, while ISO-WD21150 magnesium belongs to the magnesium alloys. There are 27 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.
For each property being compared, the top bar is automotive malleable cast iron and the bottom bar is ISO-WD21150 magnesium.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 180 | |
| 45 |
| Elongation at Break, % | 1.0 to 10 | |
| 5.7 to 11 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 70 | |
| 17 |
| Tensile Strength: Ultimate (UTS), MPa | 350 to 720 | |
| 240 to 290 |
| Tensile Strength: Yield (Proof), MPa | 220 to 590 | |
| 120 to 200 |
Thermal Properties
| Latent Heat of Fusion, J/g | 260 | |
| 350 |
| Melting Completion (Liquidus), °C | 1410 | |
| 600 |
| Melting Onset (Solidus), °C | 1370 | |
| 550 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 990 |
| Thermal Conductivity, W/m-K | 41 | |
| 100 |
| Thermal Expansion, µm/m-K | 14 | |
| 27 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.4 | |
| 19 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.7 | |
| 100 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 1.9 | |
| 12 |
| Density, g/cm3 | 7.6 | |
| 1.7 |
| Embodied Carbon, kg CO2/kg material | 1.5 | |
| 23 |
| Embodied Energy, MJ/kg | 20 | |
| 160 |
| Embodied Water, L/kg | 45 | |
| 980 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 6.8 to 30 | |
| 15 to 24 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 130 to 950 | |
| 160 to 460 |
| Stiffness to Weight: Axial, points | 13 | |
| 15 |
| Stiffness to Weight: Bending, points | 25 | |
| 70 |
| Strength to Weight: Axial, points | 13 to 26 | |
| 40 to 48 |
| Strength to Weight: Bending, points | 14 to 24 | |
| 52 to 58 |
| Thermal Diffusivity, mm2/s | 11 | |
| 60 |
| Thermal Shock Resistance, points | 9.9 to 21 | |
| 15 to 17 |
Alloy Composition
Deprecated: Automatic conversion of false to array is deprecated in /home/public/compare.php on line 460
| Aluminum (Al), % | 0 | |
| 2.4 to 3.6 |
| Carbon (C), % | 2.2 to 2.9 | |
| 0 |
| Copper (Cu), % | 0 | |
| 0 to 0.050 |
| Iron (Fe), % | 93.6 to 96.7 | |
| 0 to 0.0050 |
| Magnesium (Mg), % | 0 | |
| 94 to 97 |
| Manganese (Mn), % | 0.15 to 1.3 | |
| 0.15 to 0.4 |
| Nickel (Ni), % | 0 | |
| 0 to 0.0050 |
| Phosphorus (P), % | 0.020 to 0.15 | |
| 0 |
| Silicon (Si), % | 0.9 to 1.9 | |
| 0 to 0.1 |
| Sulfur (S), % | 0.020 to 0.2 | |
| 0 |
| Zinc (Zn), % | 0 | |
| 0.5 to 1.5 |
| Residuals, % | 0 | |
| 0 to 0.3 |