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Solder Alloy 123 vs. S31727 Stainless Steel

Solder alloy 123 belongs to the otherwise unclassified metals classification, while S31727 stainless steel belongs to the iron alloys. There are 21 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.

For each property being compared, the top bar is solder alloy 123 and the bottom bar is S31727 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 8.0
190
Elastic (Young's, Tensile) Modulus, GPa 18
200
Elongation at Break, % 45
40
Poisson's Ratio 0.44
0.28
Shear Modulus, GPa 6.2
78
Tensile Strength: Ultimate (UTS), MPa 28
630

Thermal Properties

Latent Heat of Fusion, J/g 26
290
Melting Completion (Liquidus), °C 310
1440
Melting Onset (Solidus), °C 300
1390
Specific Heat Capacity, J/kg-K 130
470
Thermal Expansion, µm/m-K 29
16

Otherwise Unclassified Properties

Base Metal Price, % relative 75
24
Density, g/cm3 11
8.0
Embodied Carbon, kg CO2/kg material 4.5
4.7
Embodied Energy, MJ/kg 74
64
Embodied Water, L/kg 500
180

Common Calculations

Stiffness to Weight: Axial, points 0.9
14
Stiffness to Weight: Bending, points 7.8
24
Strength to Weight: Axial, points 0.69
22
Strength to Weight: Bending, points 1.8
20
Thermal Shock Resistance, points 3.8
14

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 to 0.030
Chromium (Cr), % 0
17.5 to 19
Copper (Cu), % 0 to 0.080
2.8 to 4.0
Gold (Au), % 0 to 0.050
0
Indium (In), % 0 to 0.1
0
Iron (Fe), % 0 to 0.020
53.7 to 61.3
Lead (Pb), % 93.5 to 95.5
0
Manganese (Mn), % 0
0 to 1.0
Molybdenum (Mo), % 0
3.8 to 4.5
Nickel (Ni), % 0 to 0.010
14.5 to 16.5
Nitrogen (N), % 0
0.15 to 0.21
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0
0 to 1.0
Silver (Ag), % 0 to 0.1
0
Sulfur (S), % 0
0 to 0.030
Tin (Sn), % 4.5 to 5.5
0
Zinc (Zn), % 0 to 0.0010
0