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AZ81A Magnesium vs. C14520 Copper

AZ81A magnesium belongs to the magnesium alloys classification, while C14520 copper belongs to the copper alloys. There are 29 material properties with values for both materials. Properties with values for just one material (4, 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 C14520 copper.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
120
Elongation at Break, % 3.0 to 8.8
9.0 to 9.6
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 18
43
Shear Strength, MPa 91 to 130
170 to 190
Tensile Strength: Ultimate (UTS), MPa 160 to 240
290 to 330
Tensile Strength: Yield (Proof), MPa 84
230 to 250

Thermal Properties

Latent Heat of Fusion, J/g 350
210
Maximum Temperature: Mechanical, °C 130
200
Melting Completion (Liquidus), °C 600
1080
Melting Onset (Solidus), °C 500
1050
Specific Heat Capacity, J/kg-K 990
390
Thermal Conductivity, W/m-K 84
320
Thermal Expansion, µm/m-K 27
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 12
85
Electrical Conductivity: Equal Weight (Specific), % IACS 65
85

Otherwise Unclassified Properties

Base Metal Price, % relative 12
33
Density, g/cm3 1.7
8.9
Embodied Carbon, kg CO2/kg material 23
2.6
Embodied Energy, MJ/kg 160
42
Embodied Water, L/kg 990
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.0 to 17
24 to 29
Resilience: Unit (Modulus of Resilience), kJ/m3 77 to 78
240 to 280
Stiffness to Weight: Axial, points 15
7.2
Stiffness to Weight: Bending, points 70
18
Strength to Weight: Axial, points 26 to 39
9.0 to 10
Strength to Weight: Bending, points 38 to 50
11 to 12
Thermal Diffusivity, mm2/s 50
94
Thermal Shock Resistance, points 9.1 to 14
10 to 12

Alloy Composition


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Aluminum (Al), % 7.0 to 8.1
0
Copper (Cu), % 0 to 0.1
99.2 to 99.596
Magnesium (Mg), % 89.8 to 92.5
0
Manganese (Mn), % 0.13 to 0.35
0
Nickel (Ni), % 0 to 0.010
0
Phosphorus (P), % 0
0.0040 to 0.020
Silicon (Si), % 0 to 0.3
0
Tellurium (Te), % 0
0.4 to 0.7
Zinc (Zn), % 0.4 to 1.0
0
Residuals, % 0 to 0.3
0