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AZ81A Magnesium vs. C99300 Copper

AZ81A magnesium belongs to the magnesium alloys classification, while C99300 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 C99300 copper.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 55
200
Elastic (Young's, Tensile) Modulus, GPa 46
120
Elongation at Break, % 3.0 to 8.8
2.0
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 18
46
Tensile Strength: Ultimate (UTS), MPa 160 to 240
660
Tensile Strength: Yield (Proof), MPa 84
380

Thermal Properties

Latent Heat of Fusion, J/g 350
240
Maximum Temperature: Mechanical, °C 130
250
Melting Completion (Liquidus), °C 600
1080
Melting Onset (Solidus), °C 500
1070
Specific Heat Capacity, J/kg-K 990
450
Thermal Conductivity, W/m-K 84
43
Thermal Expansion, µm/m-K 27
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 12
9.0
Electrical Conductivity: Equal Weight (Specific), % IACS 65
9.8

Otherwise Unclassified Properties

Base Metal Price, % relative 12
35
Density, g/cm3 1.7
8.2
Embodied Carbon, kg CO2/kg material 23
4.5
Embodied Energy, MJ/kg 160
70
Embodied Water, L/kg 990
400

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.0 to 17
11
Resilience: Unit (Modulus of Resilience), kJ/m3 77 to 78
590
Stiffness to Weight: Axial, points 15
8.3
Stiffness to Weight: Bending, points 70
20
Strength to Weight: Axial, points 26 to 39
22
Strength to Weight: Bending, points 38 to 50
20
Thermal Diffusivity, mm2/s 50
12
Thermal Shock Resistance, points 9.1 to 14
22

Alloy Composition


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Aluminum (Al), % 7.0 to 8.1
10.7 to 11.5
Cobalt (Co), % 0
1.0 to 2.0
Copper (Cu), % 0 to 0.1
68.6 to 74.4
Iron (Fe), % 0
0.4 to 1.0
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
13.5 to 16.5
Silicon (Si), % 0 to 0.3
0 to 0.020
Tin (Sn), % 0
0 to 0.050
Zinc (Zn), % 0.4 to 1.0
0
Residuals, % 0 to 0.3
0 to 0.3