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AZ81A Magnesium vs. C82800 Copper

AZ81A magnesium belongs to the magnesium alloys classification, while C82800 copper belongs to the copper alloys. There are 27 material properties with values for both materials. Properties with values for just one material (7, 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 C82800 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
46
Tensile Strength: Ultimate (UTS), MPa 160 to 240
670 to 1140
Tensile Strength: Yield (Proof), MPa 84
380 to 1000

Thermal Properties

Latent Heat of Fusion, J/g 350
240
Maximum Temperature: Mechanical, °C 130
310
Melting Completion (Liquidus), °C 600
930
Melting Onset (Solidus), °C 500
890
Specific Heat Capacity, J/kg-K 990
390
Thermal Conductivity, W/m-K 84
120
Thermal Expansion, µm/m-K 27
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 12
18
Electrical Conductivity: Equal Weight (Specific), % IACS 65
19

Otherwise Unclassified Properties

Density, g/cm3 1.7
8.7
Embodied Carbon, kg CO2/kg material 23
12
Embodied Energy, MJ/kg 160
190
Embodied Water, L/kg 990
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.0 to 17
11 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 77 to 78
590 to 4080
Stiffness to Weight: Axial, points 15
7.8
Stiffness to Weight: Bending, points 70
19
Strength to Weight: Axial, points 26 to 39
21 to 36
Strength to Weight: Bending, points 38 to 50
20 to 28
Thermal Diffusivity, mm2/s 50
36
Thermal Shock Resistance, points 9.1 to 14
23 to 39

Alloy Composition

Aluminum (Al), % 7.0 to 8.1
0 to 0.15
Beryllium (Be), % 0
2.5 to 2.9
Chromium (Cr), % 0
0 to 0.1
Cobalt (Co), % 0
0.15 to 0.7
Copper (Cu), % 0 to 0.1
94.6 to 97.2
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

Comparable Variants