355.0 Aluminum vs. AZ91D Magnesium
355.0 aluminum belongs to the aluminum alloys classification, while AZ91D magnesium belongs to the magnesium alloys. There are 31 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.
For each property being compared, the top bar is 355.0 aluminum and the bottom bar is AZ91D magnesium.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 72 to 83 | |
| 60 to 80 |
| Elastic (Young's, Tensile) Modulus, GPa | 71 | |
| 46 |
| Elongation at Break, % | 1.5 to 2.6 | |
| 2.3 to 4.5 |
| Fatigue Strength, MPa | 55 to 70 | |
| 74 to 85 |
| Poisson's Ratio | 0.33 | |
| 0.29 |
| Shear Modulus, GPa | 27 | |
| 18 |
| Shear Strength, MPa | 150 to 240 | |
| 120 to 140 |
| Tensile Strength: Ultimate (UTS), MPa | 200 to 260 | |
| 160 to 220 |
| Tensile Strength: Yield (Proof), MPa | 150 to 190 | |
| 80 to 130 |
Thermal Properties
| Latent Heat of Fusion, J/g | 470 | |
| 350 |
| Maximum Temperature: Mechanical, °C | 180 | |
| 130 |
| Melting Completion (Liquidus), °C | 620 | |
| 600 |
| Melting Onset (Solidus), °C | 560 | |
| 490 |
| Specific Heat Capacity, J/kg-K | 890 | |
| 990 |
| Thermal Conductivity, W/m-K | 150 to 170 | |
| 78 |
| Thermal Expansion, µm/m-K | 22 | |
| 27 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 38 to 43 | |
| 11 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 120 to 140 | |
| 58 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 9.5 | |
| 12 |
| Density, g/cm3 | 2.7 | |
| 1.7 |
| Embodied Carbon, kg CO2/kg material | 8.0 | |
| 22 |
| Embodied Energy, MJ/kg | 150 | |
| 160 |
| Embodied Water, L/kg | 1120 | |
| 990 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 2.7 to 5.9 | |
| 4.2 to 7.7 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 150 to 250 | |
| 69 to 170 |
| Stiffness to Weight: Axial, points | 14 | |
| 15 |
| Stiffness to Weight: Bending, points | 51 | |
| 69 |
| Strength to Weight: Axial, points | 20 to 27 | |
| 26 to 34 |
| Strength to Weight: Bending, points | 28 to 33 | |
| 38 to 46 |
| Thermal Diffusivity, mm2/s | 60 to 69 | |
| 45 |
| Thermal Shock Resistance, points | 9.1 to 12 | |
| 9.5 to 13 |
Alloy Composition
| Aluminum (Al), % | 90.3 to 94.1 | |
| 8.3 to 9.7 |
| Chromium (Cr), % | 0 to 0.25 | |
| 0 |
| Copper (Cu), % | 1.0 to 1.5 | |
| 0 to 0.030 |
| Iron (Fe), % | 0 to 0.6 | |
| 0 to 0.0050 |
| Magnesium (Mg), % | 0.4 to 0.6 | |
| 88.7 to 91.2 |
| Manganese (Mn), % | 0 to 0.5 | |
| 0.15 to 0.5 |
| Nickel (Ni), % | 0 | |
| 0 to 0.0020 |
| Silicon (Si), % | 4.5 to 5.5 | |
| 0 to 0.1 |
| Titanium (Ti), % | 0 to 0.25 | |
| 0 |
| Zinc (Zn), % | 0 to 0.35 | |
| 0.35 to 1.0 |
| Residuals, % | 0 to 0.15 | |
| 0 |