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Solder Alloy 702 vs. C69430 Brass

Solder alloy 702 belongs to the otherwise unclassified metals classification, while C69430 brass 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 C69430 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 51
110
Elongation at Break, % 21
17
Poisson's Ratio 0.36
0.33
Shear Modulus, GPa 19
42
Tensile Strength: Ultimate (UTS), MPa 53
570

Thermal Properties

Latent Heat of Fusion, J/g 61
260
Melting Completion (Liquidus), °C 220
920
Melting Onset (Solidus), °C 220
820
Specific Heat Capacity, J/kg-K 220
410
Thermal Conductivity, W/m-K 62
26
Thermal Expansion, µm/m-K 22
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 15
6.2
Electrical Conductivity: Equal Weight (Specific), % IACS 18
6.7

Otherwise Unclassified Properties

Density, g/cm3 7.4
8.3
Embodied Carbon, kg CO2/kg material 17
2.7
Embodied Energy, MJ/kg 290
44

Common Calculations

Stiffness to Weight: Axial, points 3.8
7.4
Stiffness to Weight: Bending, points 17
19
Strength to Weight: Axial, points 2.0
19
Strength to Weight: Bending, points 4.2
18
Thermal Diffusivity, mm2/s 38
7.7
Thermal Shock Resistance, points 3.4
20

Alloy Composition

Aluminum (Al), % 0 to 0.0010
0
Antimony (Sb), % 0 to 0.1
0
Arsenic (As), % 0 to 0.030
0.030 to 0.060
Bismuth (Bi), % 0 to 0.1
0
Cadmium (Cd), % 0 to 0.0020
0
Copper (Cu), % 0 to 0.050
80 to 83
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 0.3
Nickel (Ni), % 0 to 0.010
0
Silicon (Si), % 0
3.5 to 4.5
Silver (Ag), % 2.8 to 3.2
0
Tin (Sn), % 96.3 to 97.2
0
Zinc (Zn), % 0 to 0.0010
11.4 to 16.5
Residuals, % 0
0 to 0.5