EN-MC21120 Magnesium vs. Automotive Malleable Cast Iron
EN-MC21120 magnesium belongs to the magnesium alloys classification, while automotive malleable cast iron belongs to the iron alloys. There are 28 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 EN-MC21120 magnesium and the bottom bar is automotive malleable cast iron.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 63 to 75 | |
| 130 to 290 |
| Elastic (Young's, Tensile) Modulus, GPa | 46 | |
| 180 |
| Elongation at Break, % | 2.2 to 6.7 | |
| 1.0 to 10 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 18 | |
| 70 |
| Tensile Strength: Ultimate (UTS), MPa | 200 to 270 | |
| 350 to 720 |
| Tensile Strength: Yield (Proof), MPa | 130 to 170 | |
| 220 to 590 |
Thermal Properties
| Latent Heat of Fusion, J/g | 350 | |
| 260 |
| Melting Completion (Liquidus), °C | 600 | |
| 1410 |
| Melting Onset (Solidus), °C | 490 | |
| 1370 |
| Specific Heat Capacity, J/kg-K | 990 | |
| 480 |
| Thermal Conductivity, W/m-K | 76 | |
| 41 |
| Thermal Expansion, µm/m-K | 26 | |
| 14 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 11 | |
| 7.4 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 59 | |
| 8.7 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 12 | |
| 1.9 |
| Density, g/cm3 | 1.7 | |
| 7.6 |
| Embodied Carbon, kg CO2/kg material | 22 | |
| 1.5 |
| Embodied Energy, MJ/kg | 160 | |
| 20 |
| Embodied Water, L/kg | 990 | |
| 45 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 5.0 to 15 | |
| 6.8 to 30 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 180 to 320 | |
| 130 to 950 |
| Stiffness to Weight: Axial, points | 15 | |
| 13 |
| Stiffness to Weight: Bending, points | 69 | |
| 25 |
| Strength to Weight: Axial, points | 31 to 43 | |
| 13 to 26 |
| Strength to Weight: Bending, points | 43 to 53 | |
| 14 to 24 |
| Thermal Diffusivity, mm2/s | 44 | |
| 11 |
| Thermal Shock Resistance, points | 11 to 16 | |
| 9.9 to 21 |
Alloy Composition
| Aluminum (Al), % | 8.3 to 9.7 | |
| 0 |
| Carbon (C), % | 0 | |
| 2.2 to 2.9 |
| Copper (Cu), % | 0 to 0.030 | |
| 0 |
| Iron (Fe), % | 0 to 0.0050 | |
| 93.6 to 96.7 |
| Magnesium (Mg), % | 88.6 to 91.3 | |
| 0 |
| Manganese (Mn), % | 0.1 to 0.5 | |
| 0.15 to 1.3 |
| Nickel (Ni), % | 0 to 0.0020 | |
| 0 |
| Phosphorus (P), % | 0 | |
| 0.020 to 0.15 |
| Silicon (Si), % | 0 to 0.2 | |
| 0.9 to 1.9 |
| Sulfur (S), % | 0 | |
| 0.020 to 0.2 |
| Zinc (Zn), % | 0.35 to 1.0 | |
| 0 |
| Residuals, % | 0 to 0.010 | |
| 0 |