AZ81A Magnesium vs. C70620 Copper-nickel
AZ81A magnesium belongs to the magnesium alloys classification, while C70620 copper-nickel belongs to the copper alloys. There are 22 material properties with values for both materials. Properties with values for just one material (13, 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 C70620 copper-nickel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 46 | |
| 120 |
| Poisson's Ratio | 0.29 | |
| 0.34 |
| Shear Modulus, GPa | 18 | |
| 46 |
| Tensile Strength: Ultimate (UTS), MPa | 160 to 240 | |
| 300 to 570 |
Thermal Properties
| Latent Heat of Fusion, J/g | 350 | |
| 220 |
| Maximum Temperature: Mechanical, °C | 130 | |
| 220 |
| Melting Completion (Liquidus), °C | 600 | |
| 1120 |
| Melting Onset (Solidus), °C | 500 | |
| 1060 |
| Specific Heat Capacity, J/kg-K | 990 | |
| 390 |
| Thermal Conductivity, W/m-K | 84 | |
| 49 |
| Thermal Expansion, µm/m-K | 27 | |
| 17 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 12 | |
| 33 |
| Density, g/cm3 | 1.7 | |
| 8.9 |
| Embodied Carbon, kg CO2/kg material | 23 | |
| 3.4 |
| Embodied Energy, MJ/kg | 160 | |
| 51 |
| Embodied Water, L/kg | 990 | |
| 300 |
Common Calculations
| Stiffness to Weight: Axial, points | 15 | |
| 7.7 |
| Stiffness to Weight: Bending, points | 70 | |
| 19 |
| Strength to Weight: Axial, points | 26 to 39 | |
| 9.3 to 18 |
| Strength to Weight: Bending, points | 38 to 50 | |
| 11 to 17 |
| Thermal Diffusivity, mm2/s | 50 | |
| 14 |
| Thermal Shock Resistance, points | 9.1 to 14 | |
| 10 to 20 |
Alloy Composition
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| Aluminum (Al), % | 7.0 to 8.1 | |
| 0 |
| Carbon (C), % | 0 | |
| 0 to 0.050 |
| Copper (Cu), % | 0 to 0.1 | |
| 86.5 to 90 |
| Iron (Fe), % | 0 | |
| 1.0 to 1.8 |
| Lead (Pb), % | 0 | |
| 0 to 0.020 |
| Magnesium (Mg), % | 89.8 to 92.5 | |
| 0 |
| Manganese (Mn), % | 0.13 to 0.35 | |
| 0 to 1.0 |
| Nickel (Ni), % | 0 to 0.010 | |
| 9.0 to 11 |
| Phosphorus (P), % | 0 | |
| 0 to 0.2 |
| Silicon (Si), % | 0 to 0.3 | |
| 0 |
| Sulfur (S), % | 0 | |
| 0 to 0.020 |
| Zinc (Zn), % | 0.4 to 1.0 | |
| 0 to 0.5 |
| Residuals, % | 0 to 0.3 | |
| 0 to 0.5 |