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AZ81A Magnesium vs. Solder Alloy 171

AZ81A magnesium belongs to the magnesium alloys classification, while solder alloy 171 belongs to the otherwise unclassified metals. There are 23 material properties with values for both materials. Properties with values for just one material (10, 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 solder alloy 171.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 55
16
Elastic (Young's, Tensile) Modulus, GPa 46
38
Elongation at Break, % 3.0 to 8.8
45
Poisson's Ratio 0.29
0.39
Shear Modulus, GPa 18
14
Tensile Strength: Ultimate (UTS), MPa 160 to 240
48

Thermal Properties

Latent Heat of Fusion, J/g 350
47
Melting Completion (Liquidus), °C 600
180
Melting Onset (Solidus), °C 500
180
Specific Heat Capacity, J/kg-K 990
190
Thermal Conductivity, W/m-K 84
50
Thermal Expansion, µm/m-K 27
24

Electrical Properties

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

Otherwise Unclassified Properties

Density, g/cm3 1.7
8.8
Embodied Carbon, kg CO2/kg material 23
13
Embodied Energy, MJ/kg 160
210

Common Calculations

Stiffness to Weight: Axial, points 15
2.4
Stiffness to Weight: Bending, points 70
13
Strength to Weight: Axial, points 26 to 39
1.5
Strength to Weight: Bending, points 38 to 50
3.3
Thermal Diffusivity, mm2/s 50
30
Thermal Shock Resistance, points 9.1 to 14
3.7

Alloy Composition


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Aluminum (Al), % 7.0 to 8.1
0 to 0.0010
Antimony (Sb), % 0
0 to 0.2
Arsenic (As), % 0
0 to 0.030
Bismuth (Bi), % 0
0 to 0.1
Cadmium (Cd), % 0
0 to 0.0020
Copper (Cu), % 0 to 0.1
0 to 0.080
Gold (Au), % 0
0 to 0.050
Indium (In), % 0
0 to 0.1
Iron (Fe), % 0
0 to 0.020
Lead (Pb), % 0
34.7 to 36.7
Magnesium (Mg), % 89.8 to 92.5
0
Manganese (Mn), % 0.13 to 0.35
0
Nickel (Ni), % 0 to 0.010
0 to 0.010
Silicon (Si), % 0 to 0.3
0
Silver (Ag), % 0
1.8 to 2.2
Tin (Sn), % 0
61.5 to 62.5
Zinc (Zn), % 0.4 to 1.0
0 to 0.0010
Residuals, % 0 to 0.3
0