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CC755S Brass vs. Solder Alloy 121

CC755S brass belongs to the copper alloys classification, while solder alloy 121 belongs to the otherwise unclassified metals. There are 25 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is CC755S brass and the bottom bar is solder alloy 121.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 110
11
Elastic (Young's, Tensile) Modulus, GPa 100
21
Elongation at Break, % 9.5
25
Poisson's Ratio 0.31
0.43
Shear Modulus, GPa 40
7.5
Tensile Strength: Ultimate (UTS), MPa 390
32

Thermal Properties

Latent Heat of Fusion, J/g 170
29
Melting Completion (Liquidus), °C 820
290
Melting Onset (Solidus), °C 780
230
Specific Heat Capacity, J/kg-K 390
140
Thermal Conductivity, W/m-K 120
31
Thermal Expansion, µm/m-K 21
28

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 27
8.8
Electrical Conductivity: Equal Weight (Specific), % IACS 30
7.4

Otherwise Unclassified Properties

Base Metal Price, % relative 23
80
Density, g/cm3 8.1
11
Embodied Carbon, kg CO2/kg material 2.7
5.6
Embodied Energy, MJ/kg 46
93
Embodied Water, L/kg 330
580

Common Calculations

Stiffness to Weight: Axial, points 7.1
1.1
Stiffness to Weight: Bending, points 19
8.6
Strength to Weight: Axial, points 14
0.84
Strength to Weight: Bending, points 15
2.1
Thermal Diffusivity, mm2/s 38
20
Thermal Shock Resistance, points 13
3.9

Alloy Composition

Aluminum (Al), % 0.4 to 0.7
0 to 0.0010
Antimony (Sb), % 0
0 to 0.5
Arsenic (As), % 0
0 to 0.030
Bismuth (Bi), % 0
0 to 0.25
Cadmium (Cd), % 0
0 to 0.0050
Copper (Cu), % 59.5 to 61
0 to 0.080
Gold (Au), % 0
0 to 0.050
Indium (In), % 0
0 to 0.1
Iron (Fe), % 0.050 to 0.2
0 to 0.020
Lead (Pb), % 1.2 to 1.7
83.4 to 85.5
Manganese (Mn), % 0 to 0.050
0
Nickel (Ni), % 0 to 0.2
0 to 0.010
Silicon (Si), % 0 to 0.050
0
Silver (Ag), % 0
0 to 0.1
Tin (Sn), % 0 to 0.3
14.5 to 15.5
Zinc (Zn), % 35.8 to 38.9
0 to 0.0010