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AZ91A Magnesium vs. C96900 Copper-nickel

AZ91A magnesium belongs to the magnesium alloys classification, while C96900 copper-nickel belongs to the copper alloys. There are 26 material properties with values for both materials. Properties with values for just one material (7, 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 AZ91A magnesium and the bottom bar is C96900 copper-nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
120
Elongation at Break, % 5.0
4.5
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 18
45
Tensile Strength: Ultimate (UTS), MPa 240
850
Tensile Strength: Yield (Proof), MPa 160
830

Thermal Properties

Latent Heat of Fusion, J/g 360
210
Maximum Temperature: Mechanical, °C 130
210
Melting Completion (Liquidus), °C 600
1060
Melting Onset (Solidus), °C 470
960
Specific Heat Capacity, J/kg-K 990
380
Thermal Expansion, µm/m-K 26
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
9.0
Electrical Conductivity: Equal Weight (Specific), % IACS 52
9.2

Otherwise Unclassified Properties

Base Metal Price, % relative 12
39
Density, g/cm3 1.7
8.8
Embodied Carbon, kg CO2/kg material 22
4.6
Embodied Energy, MJ/kg 160
72
Embodied Water, L/kg 990
360

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
38
Resilience: Unit (Modulus of Resilience), kJ/m3 280
2820
Stiffness to Weight: Axial, points 15
7.7
Stiffness to Weight: Bending, points 69
19
Strength to Weight: Axial, points 38
27
Strength to Weight: Bending, points 49
23
Thermal Shock Resistance, points 14
30

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
0
Copper (Cu), % 0 to 0.1
73.6 to 78
Iron (Fe), % 0
0 to 0.5
Lead (Pb), % 0
0 to 0.020
Magnesium (Mg), % 88.2 to 91.2
0 to 0.15
Manganese (Mn), % 0.13 to 0.5
0.050 to 0.3
Nickel (Ni), % 0 to 0.030
14.5 to 15.5
Niobium (Nb), % 0
0 to 0.1
Silicon (Si), % 0 to 0.5
0 to 0.3
Tin (Sn), % 0
7.5 to 8.5
Zinc (Zn), % 0.35 to 1.0
0 to 0.5
Residuals, % 0
0 to 0.5