AZ81A Magnesium vs. 2011 Aluminum
AZ81A magnesium belongs to the magnesium alloys classification, while 2011 aluminum belongs to the aluminum alloys. There are 30 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.
For each property being compared, the top bar is AZ81A magnesium and the bottom bar is 2011 aluminum.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 46 | |
| 71 |
| Elongation at Break, % | 3.0 to 8.8 | |
| 8.5 to 18 |
| Fatigue Strength, MPa | 78 to 80 | |
| 74 to 120 |
| Poisson's Ratio | 0.29 | |
| 0.33 |
| Shear Modulus, GPa | 18 | |
| 27 |
| Shear Strength, MPa | 91 to 130 | |
| 190 to 250 |
| Tensile Strength: Ultimate (UTS), MPa | 160 to 240 | |
| 310 to 420 |
| Tensile Strength: Yield (Proof), MPa | 84 | |
| 140 to 310 |
Thermal Properties
| Latent Heat of Fusion, J/g | 350 | |
| 390 |
| Maximum Temperature: Mechanical, °C | 130 | |
| 190 |
| Melting Completion (Liquidus), °C | 600 | |
| 640 |
| Melting Onset (Solidus), °C | 500 | |
| 540 |
| Specific Heat Capacity, J/kg-K | 990 | |
| 870 |
| Thermal Conductivity, W/m-K | 84 | |
| 140 to 170 |
| Thermal Expansion, µm/m-K | 27 | |
| 23 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 12 | |
| 35 to 45 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 65 | |
| 100 to 130 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 12 | |
| 11 |
| Density, g/cm3 | 1.7 | |
| 3.1 |
| Embodied Carbon, kg CO2/kg material | 23 | |
| 7.9 |
| Embodied Energy, MJ/kg | 160 | |
| 150 |
| Embodied Water, L/kg | 990 | |
| 1150 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 4.0 to 17 | |
| 29 to 52 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 77 to 78 | |
| 140 to 680 |
| Stiffness to Weight: Axial, points | 15 | |
| 13 |
| Stiffness to Weight: Bending, points | 70 | |
| 44 |
| Strength to Weight: Axial, points | 26 to 39 | |
| 27 to 37 |
| Strength to Weight: Bending, points | 38 to 50 | |
| 32 to 40 |
| Thermal Diffusivity, mm2/s | 50 | |
| 51 to 64 |
| Thermal Shock Resistance, points | 9.1 to 14 | |
| 14 to 19 |
Alloy Composition
| Aluminum (Al), % | 7.0 to 8.1 | |
| 91.3 to 94.6 |
| Bismuth (Bi), % | 0 | |
| 0.2 to 0.6 |
| Copper (Cu), % | 0 to 0.1 | |
| 5.0 to 6.0 |
| Iron (Fe), % | 0 | |
| 0 to 0.7 |
| Lead (Pb), % | 0 | |
| 0.2 to 0.6 |
| Magnesium (Mg), % | 89.8 to 92.5 | |
| 0 |
| Manganese (Mn), % | 0.13 to 0.35 | |
| 0 |
| Nickel (Ni), % | 0 to 0.010 | |
| 0 |
| Silicon (Si), % | 0 to 0.3 | |
| 0 to 0.4 |
| Zinc (Zn), % | 0.4 to 1.0 | |
| 0 to 0.3 |
| Residuals, % | 0 | |
| 0 to 0.15 |