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Solder Alloy 721 vs. C34000 Brass

Solder alloy 721 belongs to the otherwise unclassified metals classification, while C34000 brass belongs to the copper alloys. There are 21 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is solder alloy 721 and the bottom bar is C34000 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 51
100
Poisson's Ratio 0.36
0.31
Shear Modulus, GPa 19
40
Tensile Strength: Ultimate (UTS), MPa 50
340 to 650

Thermal Properties

Latent Heat of Fusion, J/g 61
170
Melting Completion (Liquidus), °C 220
930
Melting Onset (Solidus), °C 210
890
Specific Heat Capacity, J/kg-K 220
380
Thermal Conductivity, W/m-K 56
120
Thermal Expansion, µm/m-K 22
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 14
26
Electrical Conductivity: Equal Weight (Specific), % IACS 17
29

Otherwise Unclassified Properties

Density, g/cm3 7.4
8.1
Embodied Carbon, kg CO2/kg material 17
2.6
Embodied Energy, MJ/kg 280
45

Common Calculations

Stiffness to Weight: Axial, points 3.8
7.1
Stiffness to Weight: Bending, points 17
19
Strength to Weight: Axial, points 1.9
11 to 22
Strength to Weight: Bending, points 4.1
13 to 21
Thermal Diffusivity, mm2/s 34
37
Thermal Shock Resistance, points 3.2
11 to 22

Alloy Composition

Aluminum (Al), % 0 to 0.0010
0
Antimony (Sb), % 0 to 0.1
0
Arsenic (As), % 0 to 0.030
0
Bismuth (Bi), % 0.8 to 1.2
0
Cadmium (Cd), % 0 to 0.0020
0
Copper (Cu), % 0.3 to 0.7
62 to 65
Gold (Au), % 0 to 0.050
0
Indium (In), % 0 to 0.1
0
Iron (Fe), % 0 to 0.020
0 to 0.1
Lead (Pb), % 0 to 0.070
0.8 to 1.5
Nickel (Ni), % 0 to 0.010
0
Silver (Ag), % 2.3 to 2.7
0
Tin (Sn), % 95 to 96.6
0
Zinc (Zn), % 0 to 0.0010
33 to 37.2
Residuals, % 0
0 to 0.4