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Solder Alloy 121 vs. C99400 Brass

Solder alloy 121 belongs to the otherwise unclassified metals classification, while C99400 brass belongs to the copper alloys. There are 21 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is solder alloy 121 and the bottom bar is C99400 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 21
120
Poisson's Ratio 0.43
0.34
Shear Modulus, GPa 7.5
44
Tensile Strength: Ultimate (UTS), MPa 32
460 to 550

Thermal Properties

Latent Heat of Fusion, J/g 29
230
Melting Completion (Liquidus), °C 290
1070
Melting Onset (Solidus), °C 230
1020
Specific Heat Capacity, J/kg-K 140
400
Thermal Expansion, µm/m-K 28
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.8
17
Electrical Conductivity: Equal Weight (Specific), % IACS 7.4
17

Otherwise Unclassified Properties

Base Metal Price, % relative 80
30
Density, g/cm3 11
8.7
Embodied Carbon, kg CO2/kg material 5.6
2.8
Embodied Energy, MJ/kg 93
45
Embodied Water, L/kg 580
310

Common Calculations

Stiffness to Weight: Axial, points 1.1
7.5
Stiffness to Weight: Bending, points 8.6
19
Strength to Weight: Axial, points 0.84
15 to 17
Strength to Weight: Bending, points 2.1
15 to 17
Thermal Shock Resistance, points 3.9
16 to 19

Alloy Composition

Aluminum (Al), % 0 to 0.0010
0.5 to 2.0
Antimony (Sb), % 0 to 0.5
0
Arsenic (As), % 0 to 0.030
0
Bismuth (Bi), % 0 to 0.25
0
Cadmium (Cd), % 0 to 0.0050
0
Copper (Cu), % 0 to 0.080
83.5 to 96.5
Gold (Au), % 0 to 0.050
0
Indium (In), % 0 to 0.1
0
Iron (Fe), % 0 to 0.020
1.0 to 3.0
Lead (Pb), % 83.4 to 85.5
0 to 0.25
Manganese (Mn), % 0
0 to 0.5
Nickel (Ni), % 0 to 0.010
1.0 to 3.5
Silicon (Si), % 0
0.5 to 2.0
Silver (Ag), % 0 to 0.1
0
Tin (Sn), % 14.5 to 15.5
0
Zinc (Zn), % 0 to 0.0010
0.5 to 5.0
Residuals, % 0
0 to 0.3