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EN-MC21310 Magnesium vs. Solder Alloy 121

EN-MC21310 magnesium belongs to the magnesium alloys classification, while solder alloy 121 belongs to the otherwise unclassified metals. There are 25 material properties with values for both materials. Properties with values for just one material (6, 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 EN-MC21310 magnesium and the bottom bar is solder alloy 121.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 60
11
Elastic (Young's, Tensile) Modulus, GPa 45
21
Elongation at Break, % 9.0
25
Poisson's Ratio 0.29
0.43
Shear Modulus, GPa 17
7.5
Tensile Strength: Ultimate (UTS), MPa 200
32

Thermal Properties

Latent Heat of Fusion, J/g 360
29
Melting Completion (Liquidus), °C 600
290
Melting Onset (Solidus), °C 560
230
Specific Heat Capacity, J/kg-K 1000
140
Thermal Conductivity, W/m-K 89
31
Thermal Expansion, µm/m-K 26
28

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 22
8.8
Electrical Conductivity: Equal Weight (Specific), % IACS 120
7.4

Otherwise Unclassified Properties

Base Metal Price, % relative 12
80
Density, g/cm3 1.6
11
Embodied Carbon, kg CO2/kg material 23
5.6
Embodied Energy, MJ/kg 160
93
Embodied Water, L/kg 970
580

Common Calculations

Stiffness to Weight: Axial, points 15
1.1
Stiffness to Weight: Bending, points 73
8.6
Strength to Weight: Axial, points 34
0.84
Strength to Weight: Bending, points 47
2.1
Thermal Diffusivity, mm2/s 55
20
Thermal Shock Resistance, points 12
3.9

Alloy Composition


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Aluminum (Al), % 1.8 to 2.6
0 to 0.0010
Antimony (Sb), % 0
0 to 0.5
Arsenic (As), % 0
0 to 0.030
Bismuth (Bi), % 0
0 to 0.25
Cadmium (Cd), % 0
0 to 0.0050
Copper (Cu), % 0 to 0.010
0 to 0.080
Gold (Au), % 0
0 to 0.050
Indium (In), % 0
0 to 0.1
Iron (Fe), % 0 to 0.0050
0 to 0.020
Lead (Pb), % 0
83.4 to 85.5
Magnesium (Mg), % 95.2 to 97.4
0
Manganese (Mn), % 0.1 to 0.7
0
Nickel (Ni), % 0 to 0.0020
0 to 0.010
Silicon (Si), % 0.7 to 1.2
0
Silver (Ag), % 0
0 to 0.1
Tin (Sn), % 0
14.5 to 15.5
Zinc (Zn), % 0 to 0.2
0 to 0.0010
Residuals, % 0 to 0.010
0