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Solder Alloy 123 vs. SAE-AISI S6 Steel

Solder alloy 123 belongs to the otherwise unclassified metals classification, while SAE-AISI S6 steel belongs to the iron alloys. There are 23 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is solder alloy 123 and the bottom bar is SAE-AISI S6 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 18
190
Poisson's Ratio 0.44
0.29
Shear Modulus, GPa 6.2
72
Tensile Strength: Ultimate (UTS), MPa 28
670 to 1920

Thermal Properties

Latent Heat of Fusion, J/g 26
290
Melting Completion (Liquidus), °C 310
1430
Melting Onset (Solidus), °C 300
1390
Specific Heat Capacity, J/kg-K 130
480
Thermal Conductivity, W/m-K 23
41
Thermal Expansion, µm/m-K 29
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.8
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 7.1
8.9

Otherwise Unclassified Properties

Base Metal Price, % relative 75
3.2
Density, g/cm3 11
7.7
Embodied Carbon, kg CO2/kg material 4.5
2.3
Embodied Energy, MJ/kg 74
33
Embodied Water, L/kg 500
56

Common Calculations

Stiffness to Weight: Axial, points 0.9
13
Stiffness to Weight: Bending, points 7.8
25
Strength to Weight: Axial, points 0.69
24 to 70
Strength to Weight: Bending, points 1.8
22 to 45
Thermal Diffusivity, mm2/s 16
11
Thermal Shock Resistance, points 3.8
22 to 64

Alloy Composition

Aluminum (Al), % 0 to 0.0010
0
Antimony (Sb), % 0 to 0.5
0
Arsenic (As), % 0 to 0.030
0
Bismuth (Bi), % 0 to 0.1
0
Cadmium (Cd), % 0 to 0.0050
0
Carbon (C), % 0
0.4 to 0.5
Chromium (Cr), % 0
1.2 to 1.5
Copper (Cu), % 0 to 0.080
0 to 0.25
Gold (Au), % 0 to 0.050
0
Indium (In), % 0 to 0.1
0
Iron (Fe), % 0 to 0.020
92.8 to 94.7
Lead (Pb), % 93.5 to 95.5
0
Manganese (Mn), % 0
1.2 to 1.5
Molybdenum (Mo), % 0
0.3 to 0.5
Nickel (Ni), % 0 to 0.010
0
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0
2.0 to 2.5
Silver (Ag), % 0 to 0.1
0
Sulfur (S), % 0
0 to 0.030
Tin (Sn), % 4.5 to 5.5
0
Vanadium (V), % 0
0.2 to 0.4
Zinc (Zn), % 0 to 0.0010
0