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Solder Alloy 721 vs. C26000 Brass

Solder alloy 721 belongs to the otherwise unclassified metals classification, while C26000 brass belongs to the copper alloys. There are 22 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is solder alloy 721 and the bottom bar is C26000 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 51
110
Elongation at Break, % 17
2.5 to 66
Poisson's Ratio 0.36
0.31
Shear Modulus, GPa 19
41
Tensile Strength: Ultimate (UTS), MPa 50
320 to 680

Thermal Properties

Latent Heat of Fusion, J/g 61
180
Melting Completion (Liquidus), °C 220
950
Melting Onset (Solidus), °C 210
920
Specific Heat Capacity, J/kg-K 220
390
Thermal Conductivity, W/m-K 56
120
Thermal Expansion, µm/m-K 22
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 14
28
Electrical Conductivity: Equal Weight (Specific), % IACS 17
31

Otherwise Unclassified Properties

Density, g/cm3 7.4
8.2
Embodied Carbon, kg CO2/kg material 17
2.7
Embodied Energy, MJ/kg 280
45

Common Calculations

Stiffness to Weight: Axial, points 3.8
7.2
Stiffness to Weight: Bending, points 17
19
Strength to Weight: Axial, points 1.9
11 to 23
Strength to Weight: Bending, points 4.1
13 to 21
Thermal Diffusivity, mm2/s 34
38
Thermal Shock Resistance, points 3.2
11 to 23

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 to 0.0059
Cadmium (Cd), % 0 to 0.0020
0
Copper (Cu), % 0.3 to 0.7
68.5 to 71.5
Gold (Au), % 0 to 0.050
0
Indium (In), % 0 to 0.1
0
Iron (Fe), % 0 to 0.020
0 to 0.050
Lead (Pb), % 0 to 0.070
0 to 0.070
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
28.1 to 31.5
Residuals, % 0
0 to 0.3