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C68700 Brass vs. Solder Alloy 181

C68700 brass belongs to the copper alloys classification, while solder alloy 181 belongs to the otherwise unclassified metals. 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 C68700 brass and the bottom bar is solder alloy 181.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
18
Poisson's Ratio 0.32
0.44
Shear Modulus, GPa 41
6.1
Tensile Strength: Ultimate (UTS), MPa 390
27

Thermal Properties

Latent Heat of Fusion, J/g 190
26
Melting Completion (Liquidus), °C 970
310
Melting Onset (Solidus), °C 930
300
Specific Heat Capacity, J/kg-K 400
130
Thermal Conductivity, W/m-K 100
24
Thermal Expansion, µm/m-K 19
29

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 23
9.3
Electrical Conductivity: Equal Weight (Specific), % IACS 25
7.4

Otherwise Unclassified Properties

Density, g/cm3 8.3
11
Embodied Carbon, kg CO2/kg material 2.8
6.2
Embodied Energy, MJ/kg 46
100

Common Calculations

Stiffness to Weight: Axial, points 7.3
0.86
Stiffness to Weight: Bending, points 19
7.7
Strength to Weight: Axial, points 13
0.66
Strength to Weight: Bending, points 14
1.8
Thermal Diffusivity, mm2/s 30
16
Thermal Shock Resistance, points 13
3.8

Alloy Composition

Aluminum (Al), % 1.8 to 2.5
0 to 0.0010
Antimony (Sb), % 0
0 to 0.2
Arsenic (As), % 0.020 to 0.1
0 to 0.030
Bismuth (Bi), % 0
0 to 0.1
Cadmium (Cd), % 0
0 to 0.0020
Copper (Cu), % 76 to 79
0 to 0.080
Gold (Au), % 0
0 to 0.050
Indium (In), % 0
0 to 0.1
Iron (Fe), % 0 to 0.060
0 to 0.020
Lead (Pb), % 0 to 0.070
96.2 to 98
Nickel (Ni), % 0
0 to 0.010
Silver (Ag), % 0
2.0 to 3.0
Tin (Sn), % 0
0 to 0.25
Zinc (Zn), % 17.8 to 22.2
0 to 0.0010
Residuals, % 0 to 0.5
0