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AZ91A Magnesium vs. C61800 Bronze

AZ91A magnesium belongs to the magnesium alloys classification, while C61800 bronze belongs to the copper alloys. There are 30 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 AZ91A magnesium and the bottom bar is C61800 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
110
Elongation at Break, % 5.0
26
Fatigue Strength, MPa 99
190
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 18
44
Shear Strength, MPa 140
310
Tensile Strength: Ultimate (UTS), MPa 240
740
Tensile Strength: Yield (Proof), MPa 160
310

Thermal Properties

Latent Heat of Fusion, J/g 360
230
Maximum Temperature: Mechanical, °C 130
220
Melting Completion (Liquidus), °C 600
1050
Melting Onset (Solidus), °C 470
1040
Specific Heat Capacity, J/kg-K 990
440
Thermal Conductivity, W/m-K 73
64
Thermal Expansion, µm/m-K 26
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
13
Electrical Conductivity: Equal Weight (Specific), % IACS 52
14

Otherwise Unclassified Properties

Base Metal Price, % relative 12
28
Density, g/cm3 1.7
8.3
Embodied Carbon, kg CO2/kg material 22
3.1
Embodied Energy, MJ/kg 160
52
Embodied Water, L/kg 990
390

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
150
Resilience: Unit (Modulus of Resilience), kJ/m3 280
420
Stiffness to Weight: Axial, points 15
7.5
Stiffness to Weight: Bending, points 69
19
Strength to Weight: Axial, points 38
25
Strength to Weight: Bending, points 49
22
Thermal Diffusivity, mm2/s 42
18
Thermal Shock Resistance, points 14
26

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
8.5 to 11
Copper (Cu), % 0 to 0.1
86.9 to 91
Iron (Fe), % 0
0.5 to 1.5
Lead (Pb), % 0
0 to 0.020
Magnesium (Mg), % 88.2 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 to 0.1
Zinc (Zn), % 0.35 to 1.0
0 to 0.020
Residuals, % 0
0 to 0.5