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AZ81A Magnesium vs. C70600 Copper-nickel

AZ81A magnesium belongs to the magnesium alloys classification, while C70600 copper-nickel belongs to the copper alloys. There are 29 material properties with values for both materials. Properties with values for just one material (5, 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 C70600 copper-nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
120
Elongation at Break, % 3.0 to 8.8
3.0 to 34
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 18
46
Shear Strength, MPa 91 to 130
190 to 330
Tensile Strength: Ultimate (UTS), MPa 160 to 240
290 to 570
Tensile Strength: Yield (Proof), MPa 84
63 to 270

Thermal Properties

Latent Heat of Fusion, J/g 350
220
Maximum Temperature: Mechanical, °C 130
220
Melting Completion (Liquidus), °C 600
1150
Melting Onset (Solidus), °C 500
1100
Specific Heat Capacity, J/kg-K 990
390
Thermal Conductivity, W/m-K 84
44
Thermal Expansion, µm/m-K 27
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 12
9.8
Electrical Conductivity: Equal Weight (Specific), % IACS 65
9.9

Otherwise Unclassified Properties

Base Metal Price, % relative 12
33
Density, g/cm3 1.7
8.9
Embodied Carbon, kg CO2/kg material 23
3.4
Embodied Energy, MJ/kg 160
51
Embodied Water, L/kg 990
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.0 to 17
6.5 to 160
Resilience: Unit (Modulus of Resilience), kJ/m3 77 to 78
16 to 290
Stiffness to Weight: Axial, points 15
7.7
Stiffness to Weight: Bending, points 70
19
Strength to Weight: Axial, points 26 to 39
9.1 to 18
Strength to Weight: Bending, points 38 to 50
11 to 17
Thermal Diffusivity, mm2/s 50
13
Thermal Shock Resistance, points 9.1 to 14
9.8 to 19

Alloy Composition


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Aluminum (Al), % 7.0 to 8.1
0
Copper (Cu), % 0 to 0.1
84.7 to 90
Iron (Fe), % 0
1.0 to 1.8
Lead (Pb), % 0
0 to 0.050
Magnesium (Mg), % 89.8 to 92.5
0
Manganese (Mn), % 0.13 to 0.35
0 to 1.0
Nickel (Ni), % 0 to 0.010
9.0 to 11
Silicon (Si), % 0 to 0.3
0
Zinc (Zn), % 0.4 to 1.0
0 to 1.0
Residuals, % 0 to 0.3
0 to 0.5