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AZ91B Magnesium vs. C96600 Copper

AZ91B magnesium belongs to the magnesium alloys classification, while C96600 copper belongs to the copper alloys. There are 28 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 AZ91B magnesium and the bottom bar is C96600 copper.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
140
Elongation at Break, % 5.0
7.0
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 18
52
Tensile Strength: Ultimate (UTS), MPa 240
760
Tensile Strength: Yield (Proof), MPa 160
480

Thermal Properties

Latent Heat of Fusion, J/g 360
240
Maximum Temperature: Mechanical, °C 130
280
Melting Completion (Liquidus), °C 600
1180
Melting Onset (Solidus), °C 470
1100
Specific Heat Capacity, J/kg-K 990
400
Thermal Conductivity, W/m-K 73
30
Thermal Expansion, µm/m-K 26
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
4.0
Electrical Conductivity: Equal Weight (Specific), % IACS 58
4.1

Otherwise Unclassified Properties

Base Metal Price, % relative 12
65
Density, g/cm3 1.7
8.9
Embodied Carbon, kg CO2/kg material 22
7.0
Embodied Energy, MJ/kg 160
100
Embodied Water, L/kg 990
280

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
47
Resilience: Unit (Modulus of Resilience), kJ/m3 280
830
Stiffness to Weight: Axial, points 15
8.7
Stiffness to Weight: Bending, points 69
20
Strength to Weight: Axial, points 38
24
Strength to Weight: Bending, points 49
21
Thermal Diffusivity, mm2/s 42
8.4
Thermal Shock Resistance, points 14
25

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
0
Beryllium (Be), % 0
0.4 to 0.7
Copper (Cu), % 0 to 0.35
63.5 to 69.8
Iron (Fe), % 0
0.8 to 1.1
Lead (Pb), % 0
0 to 0.010
Magnesium (Mg), % 87.9 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0 to 1.0
Nickel (Ni), % 0 to 0.030
29 to 33
Silicon (Si), % 0 to 0.5
0 to 0.15
Zinc (Zn), % 0.35 to 1.0
0
Residuals, % 0
0 to 0.5