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Solder Alloy 704 vs. C87400 Brass

Solder alloy 704 belongs to the otherwise unclassified metals classification, while C87400 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 704 and the bottom bar is C87400 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 51
110
Elongation at Break, % 30
21
Poisson's Ratio 0.36
0.33
Shear Modulus, GPa 19
41
Tensile Strength: Ultimate (UTS), MPa 55
390

Thermal Properties

Latent Heat of Fusion, J/g 62
250
Melting Completion (Liquidus), °C 240
920
Melting Onset (Solidus), °C 220
820
Specific Heat Capacity, J/kg-K 220
400
Thermal Conductivity, W/m-K 50
28
Thermal Expansion, µm/m-K 22
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 13
6.7
Electrical Conductivity: Equal Weight (Specific), % IACS 15
7.2

Otherwise Unclassified Properties

Density, g/cm3 7.5
8.3
Embodied Carbon, kg CO2/kg material 19
2.7
Embodied Energy, MJ/kg 320
44

Common Calculations

Stiffness to Weight: Axial, points 3.8
7.4
Stiffness to Weight: Bending, points 17
19
Strength to Weight: Axial, points 2.1
13
Strength to Weight: Bending, points 4.3
14
Thermal Diffusivity, mm2/s 30
8.3
Thermal Shock Resistance, points 3.5
14

Alloy Composition

Aluminum (Al), % 0 to 0.0010
0 to 0.8
Antimony (Sb), % 0 to 0.1
0
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
79 to 85.5
Gold (Au), % 0 to 0.050
0
Indium (In), % 0 to 0.1
0
Iron (Fe), % 0 to 0.020
0
Lead (Pb), % 0 to 0.070
0 to 1.0
Nickel (Ni), % 0 to 0.010
0
Silicon (Si), % 0
2.5 to 4.0
Silver (Ag), % 4.8 to 5.2
0
Tin (Sn), % 94.3 to 95.2
0
Zinc (Zn), % 0 to 0.0010
12 to 16
Residuals, % 0
0 to 0.8