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AZ81A Magnesium vs. C60800 Bronze

AZ81A magnesium belongs to the magnesium alloys classification, while C60800 bronze 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 AZ81A magnesium and the bottom bar is C60800 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
110
Elongation at Break, % 3.0 to 8.8
55
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 18
46
Shear Strength, MPa 91 to 130
290
Tensile Strength: Ultimate (UTS), MPa 160 to 240
390
Tensile Strength: Yield (Proof), MPa 84
150

Thermal Properties

Latent Heat of Fusion, J/g 350
220
Maximum Temperature: Mechanical, °C 130
210
Melting Completion (Liquidus), °C 600
1060
Melting Onset (Solidus), °C 500
1050
Specific Heat Capacity, J/kg-K 990
410
Thermal Conductivity, W/m-K 84
80
Thermal Expansion, µm/m-K 27
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 12
17
Electrical Conductivity: Equal Weight (Specific), % IACS 65
18

Otherwise Unclassified Properties

Base Metal Price, % relative 12
29
Density, g/cm3 1.7
8.6
Embodied Carbon, kg CO2/kg material 23
2.9
Embodied Energy, MJ/kg 160
48
Embodied Water, L/kg 990
360

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.0 to 17
170
Resilience: Unit (Modulus of Resilience), kJ/m3 77 to 78
94
Stiffness to Weight: Axial, points 15
7.3
Stiffness to Weight: Bending, points 70
19
Strength to Weight: Axial, points 26 to 39
13
Strength to Weight: Bending, points 38 to 50
14
Thermal Diffusivity, mm2/s 50
23
Thermal Shock Resistance, points 9.1 to 14
14

Alloy Composition


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Aluminum (Al), % 7.0 to 8.1
5.0 to 6.5
Arsenic (As), % 0
0.020 to 0.35
Copper (Cu), % 0 to 0.1
92.5 to 95
Iron (Fe), % 0
0 to 0.1
Lead (Pb), % 0
0 to 0.1
Magnesium (Mg), % 89.8 to 92.5
0
Manganese (Mn), % 0.13 to 0.35
0
Nickel (Ni), % 0 to 0.010
0
Silicon (Si), % 0 to 0.3
0
Zinc (Zn), % 0.4 to 1.0
0
Residuals, % 0 to 0.3
0 to 0.5