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AZ91B Magnesium vs. C72500 Copper-nickel

AZ91B magnesium belongs to the magnesium alloys classification, while C72500 copper-nickel belongs to the copper alloys. There are 24 material properties with values for both materials. Properties with values for just one material (11, 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 AZ91B magnesium and the bottom bar is C72500 copper-nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
120
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 18
45
Tensile Strength: Ultimate (UTS), MPa 240
420 to 780

Thermal Properties

Latent Heat of Fusion, J/g 360
210
Maximum Temperature: Mechanical, °C 130
210
Melting Completion (Liquidus), °C 600
1130
Melting Onset (Solidus), °C 470
1060
Specific Heat Capacity, J/kg-K 990
390
Thermal Conductivity, W/m-K 73
54
Thermal Expansion, µm/m-K 26
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
11
Electrical Conductivity: Equal Weight (Specific), % IACS 58
11

Otherwise Unclassified Properties

Base Metal Price, % relative 12
35
Density, g/cm3 1.7
8.9
Embodied Carbon, kg CO2/kg material 22
3.6
Embodied Energy, MJ/kg 160
55
Embodied Water, L/kg 990
320

Common Calculations

Stiffness to Weight: Axial, points 15
7.6
Stiffness to Weight: Bending, points 69
19
Strength to Weight: Axial, points 38
13 to 24
Strength to Weight: Bending, points 49
14 to 21
Thermal Diffusivity, mm2/s 42
16
Thermal Shock Resistance, points 14
14 to 27

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
0
Copper (Cu), % 0 to 0.35
85.2 to 89.7
Iron (Fe), % 0
0 to 0.6
Lead (Pb), % 0
0 to 0.050
Magnesium (Mg), % 87.9 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0 to 0.2
Nickel (Ni), % 0 to 0.030
8.5 to 10.5
Silicon (Si), % 0 to 0.5
0
Tin (Sn), % 0
1.8 to 2.8
Zinc (Zn), % 0.35 to 1.0
0 to 0.5
Residuals, % 0
0 to 0.2