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Solder Alloy 121 vs. C67400 Bronze

Solder alloy 121 belongs to the otherwise unclassified metals classification, while C67400 bronze belongs to the copper alloys. There are 24 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is solder alloy 121 and the bottom bar is C67400 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 21
110
Elongation at Break, % 25
22 to 28
Poisson's Ratio 0.43
0.31
Shear Modulus, GPa 7.5
41
Tensile Strength: Ultimate (UTS), MPa 32
480 to 610

Thermal Properties

Latent Heat of Fusion, J/g 29
190
Melting Completion (Liquidus), °C 290
890
Melting Onset (Solidus), °C 230
870
Specific Heat Capacity, J/kg-K 140
400
Thermal Conductivity, W/m-K 31
100
Thermal Expansion, µm/m-K 28
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.8
23
Electrical Conductivity: Equal Weight (Specific), % IACS 7.4
26

Otherwise Unclassified Properties

Base Metal Price, % relative 80
23
Density, g/cm3 11
7.9
Embodied Carbon, kg CO2/kg material 5.6
2.8
Embodied Energy, MJ/kg 93
48
Embodied Water, L/kg 580
330

Common Calculations

Stiffness to Weight: Axial, points 1.1
7.5
Stiffness to Weight: Bending, points 8.6
20
Strength to Weight: Axial, points 0.84
17 to 22
Strength to Weight: Bending, points 2.1
17 to 20
Thermal Diffusivity, mm2/s 20
32
Thermal Shock Resistance, points 3.9
16 to 20

Alloy Composition

Aluminum (Al), % 0 to 0.0010
0.5 to 2.0
Antimony (Sb), % 0 to 0.5
0
Arsenic (As), % 0 to 0.030
0
Bismuth (Bi), % 0 to 0.25
0
Cadmium (Cd), % 0 to 0.0050
0
Copper (Cu), % 0 to 0.080
57 to 60
Gold (Au), % 0 to 0.050
0
Indium (In), % 0 to 0.1
0
Iron (Fe), % 0 to 0.020
0 to 0.35
Lead (Pb), % 83.4 to 85.5
0 to 0.5
Manganese (Mn), % 0
2.0 to 3.5
Nickel (Ni), % 0 to 0.010
0 to 0.25
Silicon (Si), % 0
0.5 to 1.5
Silver (Ag), % 0 to 0.1
0
Tin (Sn), % 14.5 to 15.5
0 to 0.3
Zinc (Zn), % 0 to 0.0010
31.1 to 40
Residuals, % 0
0 to 0.5