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AZ91B Magnesium vs. CC140C Copper

AZ91B magnesium belongs to the magnesium alloys classification, while CC140C 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 CC140C copper.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 63
110
Elastic (Young's, Tensile) Modulus, GPa 46
120
Elongation at Break, % 5.0
11
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 18
44
Tensile Strength: Ultimate (UTS), MPa 240
340
Tensile Strength: Yield (Proof), MPa 160
230

Thermal Properties

Latent Heat of Fusion, J/g 360
210
Maximum Temperature: Mechanical, °C 130
200
Melting Completion (Liquidus), °C 600
1100
Melting Onset (Solidus), °C 470
1040
Specific Heat Capacity, J/kg-K 990
390
Thermal Conductivity, W/m-K 73
310
Thermal Expansion, µm/m-K 26
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
77
Electrical Conductivity: Equal Weight (Specific), % IACS 58
78

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
34
Resilience: Unit (Modulus of Resilience), kJ/m3 280
220
Stiffness to Weight: Axial, points 15
7.3
Stiffness to Weight: Bending, points 69
18
Strength to Weight: Axial, points 38
10
Strength to Weight: Bending, points 49
12
Thermal Diffusivity, mm2/s 42
89
Thermal Shock Resistance, points 14
12

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
0
Chromium (Cr), % 0
0.4 to 1.2
Copper (Cu), % 0 to 0.35
98.8 to 99.6
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