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Solder Alloy 123 vs. SAE-AISI A7 Steel

Solder alloy 123 belongs to the otherwise unclassified metals classification, while SAE-AISI A7 steel belongs to the iron alloys. There are 21 material properties with values for both materials. Properties with values for just one material (5, 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 A7 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
800 to 2150

Thermal Properties

Latent Heat of Fusion, J/g 26
260
Melting Completion (Liquidus), °C 310
1470
Melting Onset (Solidus), °C 300
1430
Specific Heat Capacity, J/kg-K 130
470
Thermal Conductivity, W/m-K 23
37
Thermal Expansion, µm/m-K 29
12

Otherwise Unclassified Properties

Base Metal Price, % relative 75
10
Density, g/cm3 11
7.7
Embodied Carbon, kg CO2/kg material 4.5
13
Embodied Energy, MJ/kg 74
200
Embodied Water, L/kg 500
100

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
29 to 77
Strength to Weight: Bending, points 1.8
25 to 48
Thermal Diffusivity, mm2/s 16
10
Thermal Shock Resistance, points 3.8
27 to 72

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
2.0 to 2.9
Chromium (Cr), % 0
5.0 to 5.8
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
81.4 to 87.7
Lead (Pb), % 93.5 to 95.5
0
Manganese (Mn), % 0
0 to 0.8
Molybdenum (Mo), % 0
0.9 to 1.4
Nickel (Ni), % 0 to 0.010
0 to 0.3
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0
0 to 0.5
Silver (Ag), % 0 to 0.1
0
Sulfur (S), % 0
0 to 0.030
Tin (Sn), % 4.5 to 5.5
0
Tungsten (W), % 0
0.5 to 1.5
Vanadium (V), % 0
3.9 to 5.2
Zinc (Zn), % 0 to 0.0010
0