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AZ91A Magnesium vs. C86500 Bronze

AZ91A magnesium belongs to the magnesium alloys classification, while C86500 bronze 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 C86500 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
110
Elongation at Break, % 5.0
25
Poisson's Ratio 0.29
0.3
Shear Modulus, GPa 18
40
Tensile Strength: Ultimate (UTS), MPa 240
530
Tensile Strength: Yield (Proof), MPa 160
190

Thermal Properties

Latent Heat of Fusion, J/g 360
170
Maximum Temperature: Mechanical, °C 130
120
Melting Completion (Liquidus), °C 600
880
Melting Onset (Solidus), °C 470
860
Specific Heat Capacity, J/kg-K 990
390
Thermal Conductivity, W/m-K 73
86
Thermal Expansion, µm/m-K 26
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
22
Electrical Conductivity: Equal Weight (Specific), % IACS 52
25

Otherwise Unclassified Properties

Base Metal Price, % relative 12
23
Density, g/cm3 1.7
7.9
Embodied Carbon, kg CO2/kg material 22
2.8
Embodied Energy, MJ/kg 160
48
Embodied Water, L/kg 990
330

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
110
Resilience: Unit (Modulus of Resilience), kJ/m3 280
180
Stiffness to Weight: Axial, points 15
7.4
Stiffness to Weight: Bending, points 69
20
Strength to Weight: Axial, points 38
19
Strength to Weight: Bending, points 49
18
Thermal Diffusivity, mm2/s 42
28
Thermal Shock Resistance, points 14
17

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
0.5 to 1.5
Copper (Cu), % 0 to 0.1
55 to 60
Iron (Fe), % 0
0.4 to 2.0
Lead (Pb), % 0
0 to 0.4
Magnesium (Mg), % 88.2 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0.1 to 1.5
Nickel (Ni), % 0 to 0.030
0 to 1.0
Silicon (Si), % 0 to 0.5
0
Tin (Sn), % 0
0 to 1.0
Zinc (Zn), % 0.35 to 1.0
36 to 42
Residuals, % 0
0 to 1.0