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AZ81A Magnesium vs. C14300 Copper

AZ81A magnesium belongs to the magnesium alloys classification, while C14300 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 C14300 copper.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
120
Elongation at Break, % 3.0 to 8.8
2.0 to 42
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 18
43
Shear Strength, MPa 91 to 130
150 to 260
Tensile Strength: Ultimate (UTS), MPa 160 to 240
220 to 460
Tensile Strength: Yield (Proof), MPa 84
76 to 430

Thermal Properties

Latent Heat of Fusion, J/g 350
210
Maximum Temperature: Mechanical, °C 130
220
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
380
Thermal Expansion, µm/m-K 27
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 12
96
Electrical Conductivity: Equal Weight (Specific), % IACS 65
96

Otherwise Unclassified Properties

Base Metal Price, % relative 12
31
Density, g/cm3 1.7
9.0
Embodied Carbon, kg CO2/kg material 23
2.6
Embodied Energy, MJ/kg 160
41
Embodied Water, L/kg 990
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.0 to 17
9.0 to 72
Resilience: Unit (Modulus of Resilience), kJ/m3 77 to 78
25 to 810
Stiffness to Weight: Axial, points 15
7.2
Stiffness to Weight: Bending, points 70
18
Strength to Weight: Axial, points 26 to 39
6.8 to 14
Strength to Weight: Bending, points 38 to 50
9.1 to 15
Thermal Diffusivity, mm2/s 50
110
Thermal Shock Resistance, points 9.1 to 14
7.8 to 16

Alloy Composition


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Aluminum (Al), % 7.0 to 8.1
0
Cadmium (Cd), % 0
0.050 to 0.15
Copper (Cu), % 0 to 0.1
99.9 to 99.95
Magnesium (Mg), % 89.8 to 92.5
0
Manganese (Mn), % 0.13 to 0.35
0
Nickel (Ni), % 0 to 0.010
0
Silicon (Si), % 0 to 0.3
0
Zinc (Zn), % 0.4 to 1.0
0
Residuals, % 0 to 0.3
0