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AZ91B Magnesium vs. C16200 Copper

AZ91B magnesium belongs to the magnesium alloys classification, while C16200 copper belongs to the copper alloys. There are 30 material properties with values for both materials. Properties with values for just one material (3, 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 C16200 copper.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
120
Elongation at Break, % 5.0
2.0 to 56
Fatigue Strength, MPa 79
100 to 210
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 18
43
Shear Strength, MPa 140
190 to 390
Tensile Strength: Ultimate (UTS), MPa 240
240 to 550
Tensile Strength: Yield (Proof), MPa 160
48 to 470

Thermal Properties

Latent Heat of Fusion, J/g 360
210
Maximum Temperature: Mechanical, °C 130
370
Melting Completion (Liquidus), °C 600
1080
Melting Onset (Solidus), °C 470
1030
Specific Heat Capacity, J/kg-K 990
380
Thermal Conductivity, W/m-K 73
360
Thermal Expansion, µm/m-K 26
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
90
Electrical Conductivity: Equal Weight (Specific), % IACS 58
90

Otherwise Unclassified Properties

Base Metal Price, % relative 12
30
Density, g/cm3 1.7
9.0
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
10 to 99
Resilience: Unit (Modulus of Resilience), kJ/m3 280
10 to 970
Stiffness to Weight: Axial, points 15
7.2
Stiffness to Weight: Bending, points 69
18
Strength to Weight: Axial, points 38
7.4 to 17
Strength to Weight: Bending, points 49
9.6 to 17
Thermal Diffusivity, mm2/s 42
100
Thermal Shock Resistance, points 14
8.7 to 20

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
0
Cadmium (Cd), % 0
0.7 to 1.2
Copper (Cu), % 0 to 0.35
98.6 to 99.3
Iron (Fe), % 0
0 to 0.2
Magnesium (Mg), % 87.9 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
Zinc (Zn), % 0.35 to 1.0
0