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Solder Alloy 702 vs. C91700 Bronze

Solder alloy 702 belongs to the otherwise unclassified metals classification, while C91700 bronze belongs to the copper alloys. There are 22 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 702 and the bottom bar is C91700 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 51
110
Elongation at Break, % 21
13
Poisson's Ratio 0.36
0.34
Shear Modulus, GPa 19
41
Tensile Strength: Ultimate (UTS), MPa 53
330

Thermal Properties

Latent Heat of Fusion, J/g 61
190
Melting Completion (Liquidus), °C 220
1020
Melting Onset (Solidus), °C 220
850
Specific Heat Capacity, J/kg-K 220
370
Thermal Conductivity, W/m-K 62
71
Thermal Expansion, µm/m-K 22
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 15
10
Electrical Conductivity: Equal Weight (Specific), % IACS 18
10

Otherwise Unclassified Properties

Density, g/cm3 7.4
8.7
Embodied Carbon, kg CO2/kg material 17
3.9
Embodied Energy, MJ/kg 290
63

Common Calculations

Stiffness to Weight: Axial, points 3.8
6.9
Stiffness to Weight: Bending, points 17
18
Strength to Weight: Axial, points 2.0
11
Strength to Weight: Bending, points 4.2
12
Thermal Diffusivity, mm2/s 38
22
Thermal Shock Resistance, points 3.4
12

Alloy Composition

Aluminum (Al), % 0 to 0.0010
0 to 0.0050
Antimony (Sb), % 0 to 0.1
0 to 0.2
Arsenic (As), % 0 to 0.030
0
Bismuth (Bi), % 0 to 0.1
0
Cadmium (Cd), % 0 to 0.0020
0
Copper (Cu), % 0 to 0.050
84.2 to 87.5
Gold (Au), % 0 to 0.050
0
Indium (In), % 0 to 0.1
0
Iron (Fe), % 0 to 0.020
0 to 0.2
Lead (Pb), % 0 to 0.070
0 to 0.25
Nickel (Ni), % 0 to 0.010
1.2 to 2.0
Phosphorus (P), % 0
0 to 0.3
Silicon (Si), % 0
0 to 0.0050
Silver (Ag), % 2.8 to 3.2
0
Sulfur (S), % 0
0 to 0.050
Tin (Sn), % 96.3 to 97.2
11.3 to 12.5
Zinc (Zn), % 0 to 0.0010
0 to 0.25