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Solder Alloy 704 vs. C85700 Brass

Solder alloy 704 belongs to the otherwise unclassified metals classification, while C85700 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 C85700 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 51
100
Elongation at Break, % 30
17
Poisson's Ratio 0.36
0.31
Shear Modulus, GPa 19
40
Tensile Strength: Ultimate (UTS), MPa 55
310

Thermal Properties

Latent Heat of Fusion, J/g 62
170
Melting Completion (Liquidus), °C 240
940
Melting Onset (Solidus), °C 220
910
Specific Heat Capacity, J/kg-K 220
380
Thermal Conductivity, W/m-K 50
84
Thermal Expansion, µm/m-K 22
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 13
22
Electrical Conductivity: Equal Weight (Specific), % IACS 15
25

Otherwise Unclassified Properties

Density, g/cm3 7.5
8.0
Embodied Carbon, kg CO2/kg material 19
2.8
Embodied Energy, MJ/kg 320
47

Common Calculations

Stiffness to Weight: Axial, points 3.8
7.2
Stiffness to Weight: Bending, points 17
20
Strength to Weight: Axial, points 2.1
11
Strength to Weight: Bending, points 4.3
13
Thermal Diffusivity, mm2/s 30
27
Thermal Shock Resistance, points 3.5
10

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
58 to 64
Gold (Au), % 0 to 0.050
0
Indium (In), % 0 to 0.1
0
Iron (Fe), % 0 to 0.020
0 to 0.7
Lead (Pb), % 0 to 0.070
0.8 to 1.5
Nickel (Ni), % 0 to 0.010
0 to 1.0
Silicon (Si), % 0
0 to 0.050
Silver (Ag), % 4.8 to 5.2
0
Tin (Sn), % 94.3 to 95.2
0.5 to 1.5
Zinc (Zn), % 0 to 0.0010
32 to 40
Residuals, % 0
0 to 1.3