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Solder Alloy 121 vs. C14510 Copper

Solder alloy 121 belongs to the otherwise unclassified metals classification, while C14510 copper belongs to the copper alloys. There are 22 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 121 and the bottom bar is C14510 copper.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 21
120
Elongation at Break, % 25
9.1 to 9.6
Poisson's Ratio 0.43
0.34
Shear Modulus, GPa 7.5
43
Tensile Strength: Ultimate (UTS), MPa 32
300 to 320

Thermal Properties

Latent Heat of Fusion, J/g 29
210
Melting Completion (Liquidus), °C 290
1080
Melting Onset (Solidus), °C 230
1050
Specific Heat Capacity, J/kg-K 140
390
Thermal Conductivity, W/m-K 31
360
Thermal Expansion, µm/m-K 28
17

Otherwise Unclassified Properties

Base Metal Price, % relative 80
33
Density, g/cm3 11
8.9
Embodied Carbon, kg CO2/kg material 5.6
2.6
Embodied Energy, MJ/kg 93
42
Embodied Water, L/kg 580
310

Common Calculations

Stiffness to Weight: Axial, points 1.1
7.2
Stiffness to Weight: Bending, points 8.6
18
Strength to Weight: Axial, points 0.84
9.2 to 10
Strength to Weight: Bending, points 2.1
11 to 12
Thermal Diffusivity, mm2/s 20
100
Thermal Shock Resistance, points 3.9
11 to 12

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 0.25
0
Cadmium (Cd), % 0 to 0.0050
0
Copper (Cu), % 0 to 0.080
99.15 to 99.69
Gold (Au), % 0 to 0.050
0
Indium (In), % 0 to 0.1
0
Iron (Fe), % 0 to 0.020
0
Lead (Pb), % 83.4 to 85.5
0 to 0.050
Nickel (Ni), % 0 to 0.010
0
Phosphorus (P), % 0
0.010 to 0.030
Silver (Ag), % 0 to 0.1
0
Tellurium (Te), % 0
0.3 to 0.7
Tin (Sn), % 14.5 to 15.5
0
Zinc (Zn), % 0 to 0.0010
0