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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

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