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AZ91A Magnesium vs. C72200 Copper-nickel

AZ91A magnesium belongs to the magnesium alloys classification, while C72200 copper-nickel belongs to the copper alloys. There are 24 material properties with values for both materials. Properties with values for just one material (11, 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 AZ91A magnesium and the bottom bar is C72200 copper-nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
130
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 18
48
Tensile Strength: Ultimate (UTS), MPa 240
350 to 580

Thermal Properties

Latent Heat of Fusion, J/g 360
220
Maximum Temperature: Mechanical, °C 130
230
Melting Completion (Liquidus), °C 600
1180
Melting Onset (Solidus), °C 470
1120
Specific Heat Capacity, J/kg-K 990
400
Thermal Conductivity, W/m-K 73
34
Thermal Expansion, µm/m-K 26
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
6.5
Electrical Conductivity: Equal Weight (Specific), % IACS 52
6.6

Otherwise Unclassified Properties

Base Metal Price, % relative 12
36
Density, g/cm3 1.7
8.9
Embodied Carbon, kg CO2/kg material 22
3.9
Embodied Energy, MJ/kg 160
59
Embodied Water, L/kg 990
300

Common Calculations

Stiffness to Weight: Axial, points 15
8.0
Stiffness to Weight: Bending, points 69
19
Strength to Weight: Axial, points 38
11 to 18
Strength to Weight: Bending, points 49
12 to 17
Thermal Diffusivity, mm2/s 42
9.6
Thermal Shock Resistance, points 14
12 to 20

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
0
Chromium (Cr), % 0
0.3 to 0.7
Copper (Cu), % 0 to 0.1
78.1 to 84.2
Iron (Fe), % 0
0.5 to 1.0
Lead (Pb), % 0
0 to 0.050
Magnesium (Mg), % 88.2 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0 to 1.0
Nickel (Ni), % 0 to 0.030
15 to 18
Silicon (Si), % 0 to 0.5
0
Zinc (Zn), % 0.35 to 1.0
0 to 1.0
Residuals, % 0
0 to 0.2