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AZ91A Magnesium vs. C19800 Copper

AZ91A magnesium belongs to the magnesium alloys classification, while C19800 copper belongs to the copper alloys. There are 29 material properties with values for both materials. Properties with values for just one material (4, 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 C19800 copper.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
110
Elongation at Break, % 5.0
9.0 to 12
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 18
43
Shear Strength, MPa 140
260 to 330
Tensile Strength: Ultimate (UTS), MPa 240
430 to 550
Tensile Strength: Yield (Proof), MPa 160
420 to 550

Thermal Properties

Latent Heat of Fusion, J/g 360
210
Maximum Temperature: Mechanical, °C 130
200
Melting Completion (Liquidus), °C 600
1070
Melting Onset (Solidus), °C 470
1050
Specific Heat Capacity, J/kg-K 990
390
Thermal Conductivity, W/m-K 73
260
Thermal Expansion, µm/m-K 26
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
61
Electrical Conductivity: Equal Weight (Specific), % IACS 52
62

Otherwise Unclassified Properties

Base Metal Price, % relative 12
30
Density, g/cm3 1.7
8.9
Embodied Carbon, kg CO2/kg material 22
2.8
Embodied Energy, MJ/kg 160
43
Embodied Water, L/kg 990
320

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
49 to 52
Resilience: Unit (Modulus of Resilience), kJ/m3 280
770 to 1320
Stiffness to Weight: Axial, points 15
7.2
Stiffness to Weight: Bending, points 69
18
Strength to Weight: Axial, points 38
14 to 17
Strength to Weight: Bending, points 49
14 to 17
Thermal Diffusivity, mm2/s 42
75
Thermal Shock Resistance, points 14
15 to 20

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
0
Copper (Cu), % 0 to 0.1
95.7 to 99.47
Iron (Fe), % 0
0.020 to 0.5
Magnesium (Mg), % 88.2 to 91.2
0.1 to 1.0
Manganese (Mn), % 0.13 to 0.5
0
Nickel (Ni), % 0 to 0.030
0
Phosphorus (P), % 0
0.010 to 0.1
Silicon (Si), % 0 to 0.5
0
Tin (Sn), % 0
0.1 to 1.0
Zinc (Zn), % 0.35 to 1.0
0.3 to 1.5
Residuals, % 0
0 to 0.2