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Solder Alloy 721 vs. C42200 Brass

Solder alloy 721 belongs to the otherwise unclassified metals classification, while C42200 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 C42200 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 51
110
Elongation at Break, % 17
2.0 to 46
Poisson's Ratio 0.36
0.33
Shear Modulus, GPa 19
42
Tensile Strength: Ultimate (UTS), MPa 50
300 to 610

Thermal Properties

Latent Heat of Fusion, J/g 61
200
Melting Completion (Liquidus), °C 220
1040
Melting Onset (Solidus), °C 210
1020
Specific Heat Capacity, J/kg-K 220
380
Thermal Conductivity, W/m-K 56
130
Thermal Expansion, µm/m-K 22
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 14
31
Electrical Conductivity: Equal Weight (Specific), % IACS 17
32

Otherwise Unclassified Properties

Density, g/cm3 7.4
8.6
Embodied Carbon, kg CO2/kg material 17
2.7
Embodied Energy, MJ/kg 280
44

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
9.5 to 19
Strength to Weight: Bending, points 4.1
11 to 18
Thermal Diffusivity, mm2/s 34
39
Thermal Shock Resistance, points 3.2
10 to 21

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
86 to 89
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 0.050
Nickel (Ni), % 0 to 0.010
0
Phosphorus (P), % 0
0 to 0.35
Silver (Ag), % 2.3 to 2.7
0
Tin (Sn), % 95 to 96.6
0.8 to 1.4
Zinc (Zn), % 0 to 0.0010
8.7 to 13.2
Residuals, % 0
0 to 0.5