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Solder Alloy 704 vs. C90700 Bronze

Solder alloy 704 belongs to the otherwise unclassified metals classification, while C90700 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 C90700 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 14
90
Elastic (Young's, Tensile) Modulus, GPa 51
110
Elongation at Break, % 30
12
Poisson's Ratio 0.36
0.34
Shear Modulus, GPa 19
40
Tensile Strength: Ultimate (UTS), MPa 55
330

Thermal Properties

Latent Heat of Fusion, J/g 62
190
Melting Completion (Liquidus), °C 240
1000
Melting Onset (Solidus), °C 220
830
Specific Heat Capacity, J/kg-K 220
370
Thermal Conductivity, W/m-K 50
71
Thermal Expansion, µm/m-K 22
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 13
10
Electrical Conductivity: Equal Weight (Specific), % IACS 15
10

Otherwise Unclassified Properties

Density, g/cm3 7.5
8.7
Embodied Carbon, kg CO2/kg material 19
3.7
Embodied Energy, MJ/kg 320
60

Common Calculations

Stiffness to Weight: Axial, points 3.8
6.9
Stiffness to Weight: Bending, points 17
18
Strength to Weight: Axial, points 2.1
10
Strength to Weight: Bending, points 4.3
12
Thermal Diffusivity, mm2/s 30
22
Thermal Shock Resistance, points 3.5
12

Alloy Composition

Aluminum (Al), % 0 to 0.0010
0 to 0.0050
Antimony (Sb), % 0 to 0.1
0 to 0.2
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
88 to 90
Gold (Au), % 0 to 0.050
0
Indium (In), % 0 to 0.1
0
Iron (Fe), % 0 to 0.020
0 to 0.15
Lead (Pb), % 0 to 0.070
0 to 0.5
Nickel (Ni), % 0 to 0.010
0 to 0.5
Phosphorus (P), % 0
0 to 1.5
Silicon (Si), % 0
0 to 0.0050
Silver (Ag), % 4.8 to 5.2
0
Sulfur (S), % 0
0 to 0.050
Tin (Sn), % 94.3 to 95.2
10 to 12
Zinc (Zn), % 0 to 0.0010
0 to 0.5
Residuals, % 0
0 to 0.6