AZ81A Magnesium vs. C82500 Copper
AZ81A magnesium belongs to the magnesium alloys classification, while C82500 copper belongs to the copper alloys. There are 27 material properties with values for both materials. Properties with values for just one material (6, 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 AZ81A magnesium and the bottom bar is C82500 copper.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 46 | |
| 120 |
| Elongation at Break, % | 3.0 to 8.8 | |
| 1.0 to 20 |
| Poisson's Ratio | 0.29 | |
| 0.33 |
| Shear Modulus, GPa | 18 | |
| 45 |
| Tensile Strength: Ultimate (UTS), MPa | 160 to 240 | |
| 550 to 1100 |
| Tensile Strength: Yield (Proof), MPa | 84 | |
| 310 to 980 |
Thermal Properties
| Latent Heat of Fusion, J/g | 350 | |
| 240 |
| Maximum Temperature: Mechanical, °C | 130 | |
| 280 |
| Melting Completion (Liquidus), °C | 600 | |
| 980 |
| Melting Onset (Solidus), °C | 500 | |
| 860 |
| Specific Heat Capacity, J/kg-K | 990 | |
| 390 |
| Thermal Conductivity, W/m-K | 84 | |
| 130 |
| Thermal Expansion, µm/m-K | 27 | |
| 17 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 12 | |
| 20 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 65 | |
| 21 |
Otherwise Unclassified Properties
| Density, g/cm3 | 1.7 | |
| 8.8 |
| Embodied Carbon, kg CO2/kg material | 23 | |
| 10 |
| Embodied Energy, MJ/kg | 160 | |
| 160 |
| Embodied Water, L/kg | 990 | |
| 310 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 4.0 to 17 | |
| 11 to 94 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 77 to 78 | |
| 400 to 4000 |
| Stiffness to Weight: Axial, points | 15 | |
| 7.7 |
| Stiffness to Weight: Bending, points | 70 | |
| 19 |
| Strength to Weight: Axial, points | 26 to 39 | |
| 18 to 35 |
| Strength to Weight: Bending, points | 38 to 50 | |
| 17 to 27 |
| Thermal Diffusivity, mm2/s | 50 | |
| 38 |
| Thermal Shock Resistance, points | 9.1 to 14 | |
| 19 to 38 |
Alloy Composition
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| Aluminum (Al), % | 7.0 to 8.1 | |
| 0 to 0.15 |
| Beryllium (Be), % | 0 | |
| 1.9 to 2.3 |
| Chromium (Cr), % | 0 | |
| 0 to 0.1 |
| Cobalt (Co), % | 0 | |
| 0.15 to 0.7 |
| Copper (Cu), % | 0 to 0.1 | |
| 95.3 to 97.8 |
| Iron (Fe), % | 0 | |
| 0 to 0.25 |
| Lead (Pb), % | 0 | |
| 0 to 0.020 |
| Magnesium (Mg), % | 89.8 to 92.5 | |
| 0 |
| Manganese (Mn), % | 0.13 to 0.35 | |
| 0 |
| Nickel (Ni), % | 0 to 0.010 | |
| 0 to 0.2 |
| Silicon (Si), % | 0 to 0.3 | |
| 0.2 to 0.35 |
| Tin (Sn), % | 0 | |
| 0 to 0.1 |
| Titanium (Ti), % | 0 | |
| 0 to 0.12 |
| Zinc (Zn), % | 0.4 to 1.0 | |
| 0 to 0.1 |
| Residuals, % | 0 to 0.3 | |
| 0 to 0.5 |