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Solder Alloy 121 vs. C94400 Bronze

Solder alloy 121 belongs to the otherwise unclassified metals classification, while C94400 bronze belongs to the copper alloys. There are 25 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is solder alloy 121 and the bottom bar is C94400 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 11
55
Elastic (Young's, Tensile) Modulus, GPa 21
100
Elongation at Break, % 25
18
Poisson's Ratio 0.43
0.35
Shear Modulus, GPa 7.5
37
Tensile Strength: Ultimate (UTS), MPa 32
220

Thermal Properties

Latent Heat of Fusion, J/g 29
180
Melting Completion (Liquidus), °C 290
940
Melting Onset (Solidus), °C 230
790
Specific Heat Capacity, J/kg-K 140
350
Thermal Conductivity, W/m-K 31
52
Thermal Expansion, µm/m-K 28
19

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.8
10
Electrical Conductivity: Equal Weight (Specific), % IACS 7.4
9.9

Otherwise Unclassified Properties

Base Metal Price, % relative 80
32
Density, g/cm3 11
9.1
Embodied Carbon, kg CO2/kg material 5.6
3.4
Embodied Energy, MJ/kg 93
54
Embodied Water, L/kg 580
390

Common Calculations

Stiffness to Weight: Axial, points 1.1
6.1
Stiffness to Weight: Bending, points 8.6
17
Strength to Weight: Axial, points 0.84
6.8
Strength to Weight: Bending, points 2.1
9.0
Thermal Diffusivity, mm2/s 20
17
Thermal Shock Resistance, points 3.9
8.3

Alloy Composition

Aluminum (Al), % 0 to 0.0010
0 to 0.0050
Antimony (Sb), % 0 to 0.5
0 to 0.8
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
76.1 to 84
Gold (Au), % 0 to 0.050
0
Indium (In), % 0 to 0.1
0
Iron (Fe), % 0 to 0.020
0 to 0.15
Lead (Pb), % 83.4 to 85.5
9.0 to 12
Nickel (Ni), % 0 to 0.010
0 to 1.0
Phosphorus (P), % 0
0 to 0.050
Silicon (Si), % 0
0 to 0.0050
Silver (Ag), % 0 to 0.1
0
Sulfur (S), % 0
0 to 0.080
Tin (Sn), % 14.5 to 15.5
7.0 to 9.0
Zinc (Zn), % 0 to 0.0010
0 to 0.8