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2218 Aluminum vs. Solder Alloy 502

2218 aluminum belongs to the aluminum alloys classification, while solder alloy 502 belongs to the otherwise unclassified metals. There are 22 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 2218 aluminum and the bottom bar is solder alloy 502.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 73
53
Elongation at Break, % 6.8 to 10
34
Poisson's Ratio 0.33
0.36
Shear Modulus, GPa 27
19
Tensile Strength: Ultimate (UTS), MPa 330 to 430
58

Thermal Properties

Latent Heat of Fusion, J/g 390
66
Melting Completion (Liquidus), °C 640
350
Melting Onset (Solidus), °C 510
220
Specific Heat Capacity, J/kg-K 870
230
Thermal Conductivity, W/m-K 140
47
Thermal Expansion, µm/m-K 22
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 37
12
Electrical Conductivity: Equal Weight (Specific), % IACS 110
15

Otherwise Unclassified Properties

Density, g/cm3 3.1
7.4
Embodied Carbon, kg CO2/kg material 8.2
15
Embodied Energy, MJ/kg 150
260

Common Calculations

Stiffness to Weight: Axial, points 13
4.0
Stiffness to Weight: Bending, points 45
17
Strength to Weight: Axial, points 30 to 39
2.2
Strength to Weight: Bending, points 34 to 41
4.5
Thermal Diffusivity, mm2/s 52
28
Thermal Shock Resistance, points 15 to 19
3.6

Alloy Composition

Aluminum (Al), % 88.8 to 93.6
0 to 0.0010
Antimony (Sb), % 0
0 to 0.1
Arsenic (As), % 0
0 to 0.030
Bismuth (Bi), % 0
0 to 0.080
Cadmium (Cd), % 0
0 to 0.0020
Chromium (Cr), % 0 to 0.1
0
Copper (Cu), % 3.5 to 4.5
3.5 to 4.5
Gold (Au), % 0
0 to 0.050
Indium (In), % 0
0 to 0.1
Iron (Fe), % 0 to 1.0
0 to 0.020
Lead (Pb), % 0
0 to 0.070
Magnesium (Mg), % 1.2 to 1.8
0
Manganese (Mn), % 0 to 0.2
0
Nickel (Ni), % 1.7 to 2.3
0 to 0.010
Silicon (Si), % 0 to 0.9
0
Silver (Ag), % 0
0.8 to 1.2
Tin (Sn), % 0
93.8 to 95.7
Zinc (Zn), % 0 to 0.25
0 to 0.0010
Residuals, % 0 to 0.15
0