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Solder Alloy 124 vs. S35125 Stainless Steel

Solder alloy 124 belongs to the otherwise unclassified metals classification, while S35125 stainless steel belongs to the iron alloys. There are 24 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is solder alloy 124 and the bottom bar is S35125 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 17
200
Elongation at Break, % 46
39
Poisson's Ratio 0.44
0.28
Shear Modulus, GPa 5.8
78
Tensile Strength: Ultimate (UTS), MPa 27
540

Thermal Properties

Latent Heat of Fusion, J/g 24
300
Melting Completion (Liquidus), °C 330
1430
Melting Onset (Solidus), °C 320
1380
Specific Heat Capacity, J/kg-K 130
470
Thermal Conductivity, W/m-K 22
12
Thermal Expansion, µm/m-K 29
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 9.6
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 7.7
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 70
36
Density, g/cm3 11
8.1
Embodied Carbon, kg CO2/kg material 4.1
6.4
Embodied Energy, MJ/kg 68
89
Embodied Water, L/kg 470
210

Common Calculations

Stiffness to Weight: Axial, points 0.83
14
Stiffness to Weight: Bending, points 7.6
24
Strength to Weight: Axial, points 0.65
19
Strength to Weight: Bending, points 1.8
18
Thermal Diffusivity, mm2/s 15
3.1
Thermal Shock Resistance, points 3.9
12

Alloy Composition

Aluminum (Al), % 0 to 0.0010
0
Antimony (Sb), % 0 to 0.12
0
Arsenic (As), % 0 to 0.030
0
Bismuth (Bi), % 0 to 0.1
0
Cadmium (Cd), % 0 to 0.0020
0
Carbon (C), % 0
0 to 0.1
Chromium (Cr), % 0
20 to 23
Copper (Cu), % 0 to 0.080
0
Gold (Au), % 0 to 0.050
0
Indium (In), % 0 to 0.1
0
Iron (Fe), % 0 to 0.020
36.2 to 45.8
Lead (Pb), % 97.2 to 98.2
0
Manganese (Mn), % 0
1.0 to 1.5
Molybdenum (Mo), % 0
2.0 to 3.0
Nickel (Ni), % 0 to 0.010
31 to 35
Niobium (Nb), % 0
0.25 to 0.6
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 0
0 to 0.5
Silver (Ag), % 0 to 0.1
0
Sulfur (S), % 0
0 to 0.015
Tin (Sn), % 1.8 to 2.2
0
Zinc (Zn), % 0 to 0.0010
0