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AZ91A Magnesium vs. C18200 Copper

AZ91A magnesium belongs to the magnesium alloys classification, while C18200 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 C18200 copper.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
120
Elongation at Break, % 5.0
11 to 40
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 18
44
Shear Strength, MPa 140
210 to 320
Tensile Strength: Ultimate (UTS), MPa 240
310 to 530
Tensile Strength: Yield (Proof), MPa 160
97 to 450

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
1070
Specific Heat Capacity, J/kg-K 990
390
Thermal Conductivity, W/m-K 73
320
Thermal Expansion, µm/m-K 26
18

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
2.6
Embodied Energy, MJ/kg 160
41
Embodied Water, L/kg 990
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
43 to 96
Resilience: Unit (Modulus of Resilience), kJ/m3 280
40 to 860
Stiffness to Weight: Axial, points 15
7.3
Stiffness to Weight: Bending, points 69
18
Strength to Weight: Axial, points 38
9.6 to 16
Strength to Weight: Bending, points 49
11 to 16
Thermal Diffusivity, mm2/s 42
93
Thermal Shock Resistance, points 14
11 to 18

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
0
Chromium (Cr), % 0
0.6 to 1.2
Copper (Cu), % 0 to 0.1
98.6 to 99.4
Iron (Fe), % 0
0 to 0.1
Lead (Pb), % 0
0 to 0.050
Magnesium (Mg), % 88.2 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0
Nickel (Ni), % 0 to 0.030
0
Silicon (Si), % 0 to 0.5
0 to 0.1
Zinc (Zn), % 0.35 to 1.0
0