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CC765S Brass vs. Solder Alloy 121

CC765S 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 CC765S brass and the bottom bar is solder alloy 121.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 130
11
Elastic (Young's, Tensile) Modulus, GPa 110
21
Elongation at Break, % 21
25
Poisson's Ratio 0.31
0.43
Shear Modulus, GPa 42
7.5
Tensile Strength: Ultimate (UTS), MPa 540
32

Thermal Properties

Latent Heat of Fusion, J/g 180
29
Melting Completion (Liquidus), °C 860
290
Melting Onset (Solidus), °C 820
230
Specific Heat Capacity, J/kg-K 400
140
Thermal Conductivity, W/m-K 91
31
Thermal Expansion, µm/m-K 20
28

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 30
8.8
Electrical Conductivity: Equal Weight (Specific), % IACS 34
7.4

Otherwise Unclassified Properties

Base Metal Price, % relative 24
80
Density, g/cm3 8.0
11
Embodied Carbon, kg CO2/kg material 3.0
5.6
Embodied Energy, MJ/kg 51
93
Embodied Water, L/kg 330
580

Common Calculations

Stiffness to Weight: Axial, points 7.6
1.1
Stiffness to Weight: Bending, points 20
8.6
Strength to Weight: Axial, points 19
0.84
Strength to Weight: Bending, points 18
2.1
Thermal Diffusivity, mm2/s 28
20
Thermal Shock Resistance, points 17
3.9

Alloy Composition

Aluminum (Al), % 0.5 to 2.5
0 to 0.0010
Antimony (Sb), % 0 to 0.080
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), % 51 to 65
0 to 0.080
Gold (Au), % 0
0 to 0.050
Indium (In), % 0
0 to 0.1
Iron (Fe), % 0.5 to 2.0
0 to 0.020
Lead (Pb), % 0 to 0.5
83.4 to 85.5
Manganese (Mn), % 0.3 to 3.0
0
Nickel (Ni), % 0 to 6.0
0 to 0.010
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0 to 0.1
0
Silver (Ag), % 0
0 to 0.1
Tin (Sn), % 0 to 1.0
14.5 to 15.5
Zinc (Zn), % 19.8 to 47.7
0 to 0.0010