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EQ21A Magnesium vs. Solder Alloy 702

EQ21A magnesium belongs to the magnesium alloys classification, while solder alloy 702 belongs to the otherwise unclassified metals. 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 EQ21A magnesium and the bottom bar is solder alloy 702.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 44
51
Elongation at Break, % 2.4
21
Poisson's Ratio 0.29
0.36
Shear Modulus, GPa 17
19
Tensile Strength: Ultimate (UTS), MPa 250
53

Thermal Properties

Latent Heat of Fusion, J/g 340
61
Melting Completion (Liquidus), °C 640
220
Melting Onset (Solidus), °C 560
220
Specific Heat Capacity, J/kg-K 980
220
Thermal Conductivity, W/m-K 110
62
Thermal Expansion, µm/m-K 27
22

Electrical Properties

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

Otherwise Unclassified Properties

Density, g/cm3 1.9
7.4
Embodied Carbon, kg CO2/kg material 27
17
Embodied Energy, MJ/kg 210
290

Common Calculations

Stiffness to Weight: Axial, points 13
3.8
Stiffness to Weight: Bending, points 63
17
Strength to Weight: Axial, points 37
2.0
Strength to Weight: Bending, points 47
4.2
Thermal Diffusivity, mm2/s 62
38
Thermal Shock Resistance, points 15
3.4

Alloy Composition


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Aluminum (Al), % 0
0 to 0.0010
Antimony (Sb), % 0
0 to 0.1
Arsenic (As), % 0
0 to 0.030
Bismuth (Bi), % 0
0 to 0.1
Cadmium (Cd), % 0
0 to 0.0020
Copper (Cu), % 0.050 to 0.1
0 to 0.050
Gold (Au), % 0
0 to 0.050
Indium (In), % 0
0 to 0.1
Iron (Fe), % 0
0 to 0.020
Lead (Pb), % 0
0 to 0.070
Magnesium (Mg), % 93.9 to 96.8
0
Nickel (Ni), % 0 to 0.010
0 to 0.010
Silver (Ag), % 1.3 to 1.7
2.8 to 3.2
Tin (Sn), % 0
96.3 to 97.2
Unspecified Rare Earths, % 1.5 to 3.0
0
Zinc (Zn), % 0
0 to 0.0010
Zirconium (Zr), % 0.4 to 1.0
0
Residuals, % 0 to 0.3
0