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AZ81A Magnesium vs. C70260 Copper

AZ81A magnesium belongs to the magnesium alloys classification, while C70260 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 C70260 copper.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
120
Elongation at Break, % 3.0 to 8.8
9.5 to 19
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 18
44
Shear Strength, MPa 91 to 130
320 to 450
Tensile Strength: Ultimate (UTS), MPa 160 to 240
520 to 760
Tensile Strength: Yield (Proof), MPa 84
410 to 650

Thermal Properties

Latent Heat of Fusion, J/g 350
220
Maximum Temperature: Mechanical, °C 130
200
Melting Completion (Liquidus), °C 600
1060
Melting Onset (Solidus), °C 500
1040
Specific Heat Capacity, J/kg-K 990
390
Thermal Conductivity, W/m-K 84
160
Thermal Expansion, µm/m-K 27
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 12
40 to 50
Electrical Conductivity: Equal Weight (Specific), % IACS 65
40 to 51

Otherwise Unclassified Properties

Base Metal Price, % relative 12
31
Density, g/cm3 1.7
8.9
Embodied Carbon, kg CO2/kg material 23
2.7
Embodied Energy, MJ/kg 160
43
Embodied Water, L/kg 990
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.0 to 17
46 to 140
Resilience: Unit (Modulus of Resilience), kJ/m3 77 to 78
710 to 1810
Stiffness to Weight: Axial, points 15
7.3
Stiffness to Weight: Bending, points 70
18
Strength to Weight: Axial, points 26 to 39
16 to 24
Strength to Weight: Bending, points 38 to 50
16 to 21
Thermal Diffusivity, mm2/s 50
45
Thermal Shock Resistance, points 9.1 to 14
18 to 27

Alloy Composition


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Aluminum (Al), % 7.0 to 8.1
0
Copper (Cu), % 0 to 0.1
95.8 to 98.8
Magnesium (Mg), % 89.8 to 92.5
0
Manganese (Mn), % 0.13 to 0.35
0
Nickel (Ni), % 0 to 0.010
1.0 to 3.0
Phosphorus (P), % 0
0 to 0.010
Silicon (Si), % 0 to 0.3
0.2 to 0.7
Zinc (Zn), % 0.4 to 1.0
0
Residuals, % 0 to 0.3
0 to 0.5