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SAE-AISI S6 Steel vs. Solder Alloy 121

SAE-AISI S6 steel belongs to the iron alloys classification, while solder alloy 121 belongs to the otherwise unclassified metals. 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 SAE-AISI S6 steel and the bottom bar is solder alloy 121.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
21
Poisson's Ratio 0.29
0.43
Shear Modulus, GPa 72
7.5
Tensile Strength: Ultimate (UTS), MPa 670 to 1920
32

Thermal Properties

Latent Heat of Fusion, J/g 290
29
Melting Completion (Liquidus), °C 1430
290
Melting Onset (Solidus), °C 1390
230
Specific Heat Capacity, J/kg-K 480
140
Thermal Conductivity, W/m-K 41
31
Thermal Expansion, µm/m-K 12
28

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
8.8
Electrical Conductivity: Equal Weight (Specific), % IACS 8.9
7.4

Otherwise Unclassified Properties

Base Metal Price, % relative 3.2
80
Density, g/cm3 7.7
11
Embodied Carbon, kg CO2/kg material 2.3
5.6
Embodied Energy, MJ/kg 33
93
Embodied Water, L/kg 56
580

Common Calculations

Stiffness to Weight: Axial, points 13
1.1
Stiffness to Weight: Bending, points 25
8.6
Strength to Weight: Axial, points 24 to 70
0.84
Strength to Weight: Bending, points 22 to 45
2.1
Thermal Diffusivity, mm2/s 11
20
Thermal Shock Resistance, points 22 to 64
3.9

Alloy Composition

Aluminum (Al), % 0
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
Carbon (C), % 0.4 to 0.5
0
Chromium (Cr), % 1.2 to 1.5
0
Copper (Cu), % 0 to 0.25
0 to 0.080
Gold (Au), % 0
0 to 0.050
Indium (In), % 0
0 to 0.1
Iron (Fe), % 92.8 to 94.7
0 to 0.020
Lead (Pb), % 0
83.4 to 85.5
Manganese (Mn), % 1.2 to 1.5
0
Molybdenum (Mo), % 0.3 to 0.5
0
Nickel (Ni), % 0
0 to 0.010
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 2.0 to 2.5
0
Silver (Ag), % 0
0 to 0.1
Sulfur (S), % 0 to 0.030
0
Tin (Sn), % 0
14.5 to 15.5
Vanadium (V), % 0.2 to 0.4
0
Zinc (Zn), % 0
0 to 0.0010