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Solder Alloy 171 vs. QE22A Magnesium

Solder alloy 171 belongs to the otherwise unclassified metals classification, while QE22A magnesium belongs to the magnesium alloys. There are 23 material properties with values for both materials. Properties with values for just one material (9, 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 solder alloy 171 and the bottom bar is QE22A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 16
80
Elastic (Young's, Tensile) Modulus, GPa 38
44
Elongation at Break, % 45
2.4
Poisson's Ratio 0.39
0.29
Shear Modulus, GPa 14
17
Tensile Strength: Ultimate (UTS), MPa 48
250

Thermal Properties

Latent Heat of Fusion, J/g 47
340
Melting Completion (Liquidus), °C 180
640
Melting Onset (Solidus), °C 180
570
Specific Heat Capacity, J/kg-K 190
970
Thermal Conductivity, W/m-K 50
110
Thermal Expansion, µm/m-K 24
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 12
25
Electrical Conductivity: Equal Weight (Specific), % IACS 12
120

Otherwise Unclassified Properties

Density, g/cm3 8.8
2.0
Embodied Carbon, kg CO2/kg material 13
27
Embodied Energy, MJ/kg 210
220

Common Calculations

Stiffness to Weight: Axial, points 2.4
13
Stiffness to Weight: Bending, points 13
60
Strength to Weight: Axial, points 1.5
36
Strength to Weight: Bending, points 3.3
46
Thermal Diffusivity, mm2/s 30
59
Thermal Shock Resistance, points 3.7
15

Alloy Composition

Aluminum (Al), % 0 to 0.0010
0
Antimony (Sb), % 0 to 0.2
0
Arsenic (As), % 0 to 0.030
0
Bismuth (Bi), % 0 to 0.1
0
Cadmium (Cd), % 0 to 0.0020
0
Copper (Cu), % 0 to 0.080
0 to 0.1
Gold (Au), % 0 to 0.050
0
Indium (In), % 0 to 0.1
0
Iron (Fe), % 0 to 0.020
0
Lead (Pb), % 34.7 to 36.7
0
Magnesium (Mg), % 0
93.1 to 95.8
Nickel (Ni), % 0 to 0.010
0 to 0.010
Silver (Ag), % 1.8 to 2.2
2.0 to 3.0
Tin (Sn), % 61.5 to 62.5
0
Unspecified Rare Earths, % 0
1.8 to 2.5
Zinc (Zn), % 0 to 0.0010
0
Zirconium (Zr), % 0
0.4 to 1.0
Residuals, % 0
0 to 0.3