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AZ81A Magnesium vs. C82500 Copper

AZ81A magnesium belongs to the magnesium alloys classification, while C82500 copper belongs to the copper alloys. There are 27 material properties with values for both materials. Properties with values for just one material (6, 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 C82500 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
45
Tensile Strength: Ultimate (UTS), MPa 160 to 240
550 to 1100
Tensile Strength: Yield (Proof), MPa 84
310 to 980

Thermal Properties

Latent Heat of Fusion, J/g 350
240
Maximum Temperature: Mechanical, °C 130
280
Melting Completion (Liquidus), °C 600
980
Melting Onset (Solidus), °C 500
860
Specific Heat Capacity, J/kg-K 990
390
Thermal Conductivity, W/m-K 84
130
Thermal Expansion, µm/m-K 27
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 12
20
Electrical Conductivity: Equal Weight (Specific), % IACS 65
21

Otherwise Unclassified Properties

Density, g/cm3 1.7
8.8
Embodied Carbon, kg CO2/kg material 23
10
Embodied Energy, MJ/kg 160
160
Embodied Water, L/kg 990
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.0 to 17
11 to 94
Resilience: Unit (Modulus of Resilience), kJ/m3 77 to 78
400 to 4000
Stiffness to Weight: Axial, points 15
7.7
Stiffness to Weight: Bending, points 70
19
Strength to Weight: Axial, points 26 to 39
18 to 35
Strength to Weight: Bending, points 38 to 50
17 to 27
Thermal Diffusivity, mm2/s 50
38
Thermal Shock Resistance, points 9.1 to 14
19 to 38

Alloy Composition

Aluminum (Al), % 7.0 to 8.1
0 to 0.15
Beryllium (Be), % 0
1.9 to 2.3
Chromium (Cr), % 0
0 to 0.1
Cobalt (Co), % 0
0.15 to 0.7
Copper (Cu), % 0 to 0.1
95.3 to 97.8
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