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AZ91B Magnesium vs. C71580 Copper-nickel

AZ91B magnesium belongs to the magnesium alloys classification, while C71580 copper-nickel belongs to the copper alloys. There are 30 material properties with values for both materials. Properties with values for just one material (3, 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 C71580 copper-nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 63
75
Elastic (Young's, Tensile) Modulus, GPa 46
140
Elongation at Break, % 5.0
40
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 18
51
Shear Strength, MPa 140
230
Tensile Strength: Ultimate (UTS), MPa 240
330
Tensile Strength: Yield (Proof), MPa 160
110

Thermal Properties

Latent Heat of Fusion, J/g 360
230
Maximum Temperature: Mechanical, °C 130
260
Melting Completion (Liquidus), °C 600
1180
Melting Onset (Solidus), °C 470
1120
Specific Heat Capacity, J/kg-K 990
400
Thermal Conductivity, W/m-K 73
39
Thermal Expansion, µm/m-K 26
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
4.7
Electrical Conductivity: Equal Weight (Specific), % IACS 58
4.7

Otherwise Unclassified Properties

Base Metal Price, % relative 12
41
Density, g/cm3 1.7
8.9
Embodied Carbon, kg CO2/kg material 22
5.1
Embodied Energy, MJ/kg 160
74
Embodied Water, L/kg 990
280

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
100
Resilience: Unit (Modulus of Resilience), kJ/m3 280
47
Stiffness to Weight: Axial, points 15
8.5
Stiffness to Weight: Bending, points 69
19
Strength to Weight: Axial, points 38
10
Strength to Weight: Bending, points 49
12
Thermal Diffusivity, mm2/s 42
11
Thermal Shock Resistance, points 14
11

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
0
Carbon (C), % 0
0 to 0.070
Copper (Cu), % 0 to 0.35
65.5 to 71
Iron (Fe), % 0
0 to 0.5
Lead (Pb), % 0
0 to 0.050
Magnesium (Mg), % 87.9 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0 to 0.3
Nickel (Ni), % 0 to 0.030
29 to 33
Silicon (Si), % 0 to 0.5
0
Zinc (Zn), % 0.35 to 1.0
0 to 0.050
Residuals, % 0
0 to 0.5