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204.0 Aluminum vs. Solder Alloy 121

204.0 aluminum belongs to the aluminum 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 204.0 aluminum and the bottom bar is solder alloy 121.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 90 to 120
11
Elastic (Young's, Tensile) Modulus, GPa 71
21
Elongation at Break, % 5.7 to 7.8
25
Poisson's Ratio 0.33
0.43
Shear Modulus, GPa 27
7.5
Tensile Strength: Ultimate (UTS), MPa 230 to 340
32

Thermal Properties

Latent Heat of Fusion, J/g 390
29
Melting Completion (Liquidus), °C 650
290
Melting Onset (Solidus), °C 580
230
Specific Heat Capacity, J/kg-K 880
140
Thermal Conductivity, W/m-K 120
31
Thermal Expansion, µm/m-K 19
28

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 29 to 34
8.8
Electrical Conductivity: Equal Weight (Specific), % IACS 87 to 100
7.4

Otherwise Unclassified Properties

Base Metal Price, % relative 11
80
Density, g/cm3 3.0
11
Embodied Carbon, kg CO2/kg material 8.0
5.6
Embodied Energy, MJ/kg 150
93
Embodied Water, L/kg 1150
580

Common Calculations

Stiffness to Weight: Axial, points 13
1.1
Stiffness to Weight: Bending, points 46
8.6
Strength to Weight: Axial, points 21 to 31
0.84
Strength to Weight: Bending, points 28 to 36
2.1
Thermal Diffusivity, mm2/s 46
20
Thermal Shock Resistance, points 12 to 18
3.9

Alloy Composition

Aluminum (Al), % 93.4 to 95.5
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), % 4.2 to 5.0
0 to 0.080
Gold (Au), % 0
0 to 0.050
Indium (In), % 0
0 to 0.1
Iron (Fe), % 0 to 0.35
0 to 0.020
Lead (Pb), % 0
83.4 to 85.5
Magnesium (Mg), % 0.15 to 0.35
0
Manganese (Mn), % 0 to 0.1
0
Nickel (Ni), % 0 to 0.050
0 to 0.010
Silicon (Si), % 0 to 0.2
0
Silver (Ag), % 0
0 to 0.1
Tin (Sn), % 0 to 0.050
14.5 to 15.5
Titanium (Ti), % 0.15 to 0.3
0
Zinc (Zn), % 0 to 0.1
0 to 0.0010
Residuals, % 0 to 0.15
0