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AZ91A Magnesium vs. C18100 Copper

AZ91A magnesium belongs to the magnesium alloys classification, while C18100 copper 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 AZ91A magnesium and the bottom bar is C18100 copper.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
120
Elongation at Break, % 5.0
8.3
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 18
47
Shear Strength, MPa 140
300
Tensile Strength: Ultimate (UTS), MPa 240
510
Tensile Strength: Yield (Proof), MPa 160
460

Thermal Properties

Latent Heat of Fusion, J/g 360
210
Maximum Temperature: Mechanical, °C 130
200
Melting Completion (Liquidus), °C 600
1080
Melting Onset (Solidus), °C 470
1020
Specific Heat Capacity, J/kg-K 990
390
Thermal Conductivity, W/m-K 73
320
Thermal Expansion, µm/m-K 26
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
80
Electrical Conductivity: Equal Weight (Specific), % IACS 52
81

Otherwise Unclassified Properties

Base Metal Price, % relative 12
31
Density, g/cm3 1.7
8.9
Embodied Carbon, kg CO2/kg material 22
2.7
Embodied Energy, MJ/kg 160
43
Embodied Water, L/kg 990
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
40
Resilience: Unit (Modulus of Resilience), kJ/m3 280
900
Stiffness to Weight: Axial, points 15
7.3
Stiffness to Weight: Bending, points 69
18
Strength to Weight: Axial, points 38
16
Strength to Weight: Bending, points 49
16
Thermal Diffusivity, mm2/s 42
94
Thermal Shock Resistance, points 14
18

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
0
Chromium (Cr), % 0
0.4 to 1.2
Copper (Cu), % 0 to 0.1
98.7 to 99.49
Magnesium (Mg), % 88.2 to 91.2
0.030 to 0.060
Manganese (Mn), % 0.13 to 0.5
0
Nickel (Ni), % 0 to 0.030
0
Silicon (Si), % 0 to 0.5
0
Zinc (Zn), % 0.35 to 1.0
0
Zirconium (Zr), % 0
0.080 to 0.2
Residuals, % 0
0 to 0.5