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Solder Alloy 171 vs. SAE-AISI 8740 Steel

Solder alloy 171 belongs to the otherwise unclassified metals classification, while SAE-AISI 8740 steel belongs to the iron alloys. There are 23 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 171 and the bottom bar is SAE-AISI 8740 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 16
170 to 200
Elastic (Young's, Tensile) Modulus, GPa 38
190
Elongation at Break, % 45
11 to 23
Poisson's Ratio 0.39
0.29
Shear Modulus, GPa 14
73
Tensile Strength: Ultimate (UTS), MPa 48
580 to 670

Thermal Properties

Latent Heat of Fusion, J/g 47
250
Melting Completion (Liquidus), °C 180
1460
Melting Onset (Solidus), °C 180
1420
Specific Heat Capacity, J/kg-K 190
470
Thermal Conductivity, W/m-K 50
39
Thermal Expansion, µm/m-K 24
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 12
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 12
8.4

Otherwise Unclassified Properties

Density, g/cm3 8.8
7.8
Embodied Carbon, kg CO2/kg material 13
1.5
Embodied Energy, MJ/kg 210
20

Common Calculations

Stiffness to Weight: Axial, points 2.4
13
Stiffness to Weight: Bending, points 13
24
Strength to Weight: Axial, points 1.5
20 to 24
Strength to Weight: Bending, points 3.3
20 to 22
Thermal Diffusivity, mm2/s 30
10
Thermal Shock Resistance, points 3.7
17 to 20

Alloy Composition

Aluminum (Al), % 0 to 0.0010
0
Antimony (Sb), % 0 to 0.2
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
0.38 to 0.43
Chromium (Cr), % 0
0.4 to 0.6
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
96.5 to 97.7
Lead (Pb), % 34.7 to 36.7
0
Manganese (Mn), % 0
0.75 to 1.0
Molybdenum (Mo), % 0
0.2 to 0.3
Nickel (Ni), % 0 to 0.010
0.4 to 0.7
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0
0.15 to 0.35
Silver (Ag), % 1.8 to 2.2
0
Sulfur (S), % 0
0 to 0.040
Tin (Sn), % 61.5 to 62.5
0
Zinc (Zn), % 0 to 0.0010
0