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EN-MC21210 Magnesium vs. Solder Alloy 121

EN-MC21210 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-MC21210 magnesium and the bottom bar is solder alloy 121.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 48
11
Elastic (Young's, Tensile) Modulus, GPa 44
21
Elongation at Break, % 14
25
Poisson's Ratio 0.29
0.43
Shear Modulus, GPa 17
7.5
Tensile Strength: Ultimate (UTS), MPa 190
32

Thermal Properties

Latent Heat of Fusion, J/g 350
29
Melting Completion (Liquidus), °C 600
290
Melting Onset (Solidus), °C 570
230
Specific Heat Capacity, J/kg-K 1000
140
Thermal Conductivity, W/m-K 120
31
Thermal Expansion, µm/m-K 27
28

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 24
8.8
Electrical Conductivity: Equal Weight (Specific), % IACS 130
7.4

Otherwise Unclassified Properties

Base Metal Price, % relative 12
80
Density, g/cm3 1.6
11
Embodied Carbon, kg CO2/kg material 24
5.6
Embodied Energy, MJ/kg 160
93
Embodied Water, L/kg 980
580

Common Calculations

Stiffness to Weight: Axial, points 15
1.1
Stiffness to Weight: Bending, points 72
8.6
Strength to Weight: Axial, points 32
0.84
Strength to Weight: Bending, points 44
2.1
Thermal Diffusivity, mm2/s 76
20
Thermal Shock Resistance, points 11
3.9

Alloy Composition


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Aluminum (Al), % 1.6 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), % 96.3 to 98.3
0
Manganese (Mn), % 0.1 to 0.7
0
Nickel (Ni), % 0 to 0.0020
0 to 0.010
Silicon (Si), % 0 to 0.1
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