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AZ91B Magnesium vs. C14520 Copper

AZ91B magnesium belongs to the magnesium alloys classification, while C14520 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 AZ91B magnesium and the bottom bar is C14520 copper.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
120
Elongation at Break, % 5.0
9.0 to 9.6
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 18
43
Shear Strength, MPa 140
170 to 190
Tensile Strength: Ultimate (UTS), MPa 240
290 to 330
Tensile Strength: Yield (Proof), MPa 160
230 to 250

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
1050
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 11
85
Electrical Conductivity: Equal Weight (Specific), % IACS 58
85

Otherwise Unclassified Properties

Base Metal Price, % relative 12
33
Density, g/cm3 1.7
8.9
Embodied Carbon, kg CO2/kg material 22
2.6
Embodied Energy, MJ/kg 160
42
Embodied Water, L/kg 990
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
24 to 29
Resilience: Unit (Modulus of Resilience), kJ/m3 280
240 to 280
Stiffness to Weight: Axial, points 15
7.2
Stiffness to Weight: Bending, points 69
18
Strength to Weight: Axial, points 38
9.0 to 10
Strength to Weight: Bending, points 49
11 to 12
Thermal Diffusivity, mm2/s 42
94
Thermal Shock Resistance, points 14
10 to 12

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
0
Copper (Cu), % 0 to 0.35
99.2 to 99.596
Magnesium (Mg), % 87.9 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0
Nickel (Ni), % 0 to 0.030
0
Phosphorus (P), % 0
0.0040 to 0.020
Silicon (Si), % 0 to 0.5
0
Tellurium (Te), % 0
0.4 to 0.7
Zinc (Zn), % 0.35 to 1.0
0