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Solder Alloy 704 vs. CC491K Bronze

Solder alloy 704 belongs to the otherwise unclassified metals classification, while CC491K bronze belongs to the copper alloys. There are 23 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 solder alloy 704 and the bottom bar is CC491K bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 14
73
Elastic (Young's, Tensile) Modulus, GPa 51
110
Elongation at Break, % 30
13
Poisson's Ratio 0.36
0.34
Shear Modulus, GPa 19
40
Tensile Strength: Ultimate (UTS), MPa 55
260

Thermal Properties

Latent Heat of Fusion, J/g 62
190
Melting Completion (Liquidus), °C 240
980
Melting Onset (Solidus), °C 220
900
Specific Heat Capacity, J/kg-K 220
370
Thermal Conductivity, W/m-K 50
71
Thermal Expansion, µm/m-K 22
19

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 13
15
Electrical Conductivity: Equal Weight (Specific), % IACS 15
15

Otherwise Unclassified Properties

Density, g/cm3 7.5
8.9
Embodied Carbon, kg CO2/kg material 19
3.1
Embodied Energy, MJ/kg 320
51

Common Calculations

Stiffness to Weight: Axial, points 3.8
6.7
Stiffness to Weight: Bending, points 17
18
Strength to Weight: Axial, points 2.1
8.1
Strength to Weight: Bending, points 4.3
10
Thermal Diffusivity, mm2/s 30
22
Thermal Shock Resistance, points 3.5
9.3

Alloy Composition

Aluminum (Al), % 0 to 0.0010
0 to 0.010
Antimony (Sb), % 0 to 0.1
0 to 0.25
Arsenic (As), % 0 to 0.030
0
Bismuth (Bi), % 0 to 0.1
0
Cadmium (Cd), % 0 to 0.0020
0
Copper (Cu), % 0 to 0.050
81 to 87
Gold (Au), % 0 to 0.050
0
Indium (In), % 0 to 0.1
0
Iron (Fe), % 0 to 0.020
0 to 0.3
Lead (Pb), % 0 to 0.070
4.0 to 6.0
Nickel (Ni), % 0 to 0.010
0 to 2.0
Phosphorus (P), % 0
0 to 0.1
Silicon (Si), % 0
0 to 0.010
Silver (Ag), % 4.8 to 5.2
0
Sulfur (S), % 0
0 to 0.1
Tin (Sn), % 94.3 to 95.2
4.0 to 6.0
Zinc (Zn), % 0 to 0.0010
4.0 to 6.0