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AZ91A Magnesium vs. CR012A Copper

AZ91A magnesium belongs to the magnesium alloys classification, while CR012A copper belongs to the copper alloys. There are 28 material properties with values for both materials. Properties with values for just one material (5, 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 CR012A copper.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
120
Elongation at Break, % 5.0
15
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 18
43
Tensile Strength: Ultimate (UTS), MPa 240
220
Tensile Strength: Yield (Proof), MPa 160
130

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
1040
Specific Heat Capacity, J/kg-K 990
390
Thermal Conductivity, W/m-K 73
390
Thermal Expansion, µm/m-K 26
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
100
Electrical Conductivity: Equal Weight (Specific), % IACS 52
100

Otherwise Unclassified Properties

Base Metal Price, % relative 12
33
Density, g/cm3 1.7
9.0
Embodied Carbon, kg CO2/kg material 22
2.7
Embodied Energy, MJ/kg 160
42
Embodied Water, L/kg 990
360

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
29
Resilience: Unit (Modulus of Resilience), kJ/m3 280
76
Stiffness to Weight: Axial, points 15
7.2
Stiffness to Weight: Bending, points 69
18
Strength to Weight: Axial, points 38
6.8
Strength to Weight: Bending, points 49
9.0
Thermal Diffusivity, mm2/s 42
110
Thermal Shock Resistance, points 14
7.8

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
0
Bismuth (Bi), % 0
0 to 0.00050
Copper (Cu), % 0 to 0.1
99.85 to 99.94
Magnesium (Mg), % 88.2 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0
Nickel (Ni), % 0 to 0.030
0
Oxygen (O), % 0
0 to 0.040
Silicon (Si), % 0 to 0.5
0
Silver (Ag), % 0
0.060 to 0.080
Zinc (Zn), % 0.35 to 1.0
0