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AZ91A Magnesium vs. C19020 Copper

AZ91A magnesium belongs to the magnesium alloys classification, while C19020 copper belongs to the copper alloys. There are 26 material properties with values for both materials. Properties with values for just one material (7, 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 C19020 copper.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
120
Elongation at Break, % 5.0
2.3 to 5.7
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 18
44
Shear Strength, MPa 140
260 to 340
Tensile Strength: Ultimate (UTS), MPa 240
440 to 590

Thermal Properties

Latent Heat of Fusion, J/g 360
210
Maximum Temperature: Mechanical, °C 130
200
Melting Completion (Liquidus), °C 600
1090
Melting Onset (Solidus), °C 470
1030
Specific Heat Capacity, J/kg-K 990
390
Thermal Conductivity, W/m-K 73
190
Thermal Expansion, µm/m-K 26
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
50
Electrical Conductivity: Equal Weight (Specific), % IACS 52
50

Otherwise Unclassified Properties

Base Metal Price, % relative 12
31
Density, g/cm3 1.7
8.9
Embodied Carbon, kg CO2/kg material 22
2.8
Embodied Energy, MJ/kg 160
44
Embodied Water, L/kg 990
310

Common Calculations

Stiffness to Weight: Axial, points 15
7.2
Stiffness to Weight: Bending, points 69
18
Strength to Weight: Axial, points 38
14 to 18
Strength to Weight: Bending, points 49
14 to 18
Thermal Diffusivity, mm2/s 42
55
Thermal Shock Resistance, points 14
16 to 21

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
0
Copper (Cu), % 0 to 0.1
95.7 to 99.19
Magnesium (Mg), % 88.2 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0
Nickel (Ni), % 0 to 0.030
0.5 to 3.0
Phosphorus (P), % 0
0.010 to 0.2
Silicon (Si), % 0 to 0.5
0
Tin (Sn), % 0
0.3 to 0.9
Zinc (Zn), % 0.35 to 1.0
0
Residuals, % 0
0 to 0.2