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Solder Alloy 402 vs. QE22A Magnesium

Solder alloy 402 belongs to the otherwise unclassified metals classification, while QE22A magnesium belongs to the magnesium alloys. There are 22 material properties with values for both materials. Properties with values for just one material (11, 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 402 and the bottom bar is QE22A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 52
44
Elongation at Break, % 20
2.4
Poisson's Ratio 0.36
0.29
Shear Modulus, GPa 19
17
Tensile Strength: Ultimate (UTS), MPa 57
250

Thermal Properties

Latent Heat of Fusion, J/g 64
340
Melting Completion (Liquidus), °C 310
640
Melting Onset (Solidus), °C 230
570
Specific Heat Capacity, J/kg-K 230
970
Thermal Conductivity, W/m-K 61
110
Thermal Expansion, µm/m-K 22
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 15
25
Electrical Conductivity: Equal Weight (Specific), % IACS 18
120

Otherwise Unclassified Properties

Density, g/cm3 7.3
2.0
Embodied Carbon, kg CO2/kg material 15
27
Embodied Energy, MJ/kg 250
220

Common Calculations

Stiffness to Weight: Axial, points 3.9
13
Stiffness to Weight: Bending, points 17
60
Strength to Weight: Axial, points 2.2
36
Strength to Weight: Bending, points 4.5
46
Thermal Diffusivity, mm2/s 37
59
Thermal Shock Resistance, points 3.6
15

Alloy Composition

Aluminum (Al), % 0 to 0.0010
0
Antimony (Sb), % 0 to 0.1
0
Arsenic (As), % 0 to 0.030
0
Bismuth (Bi), % 0 to 0.1
0
Cadmium (Cd), % 0 to 0.0020
0
Copper (Cu), % 2.5 to 3.5
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), % 0 to 0.070
0
Magnesium (Mg), % 0
93.1 to 95.8
Nickel (Ni), % 0 to 0.010
0 to 0.010
Silver (Ag), % 0 to 0.1
2.0 to 3.0
Tin (Sn), % 95.9 to 97.5
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