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Solder Alloy 711 vs. Solder Alloy 704

Both solder alloy 711 and solder alloy 704 are otherwise unclassified metals. Both are furnished in the as-fabricated (no temper or treatment) condition. They have a very high 98% of their average alloy composition in common.

For each property being compared, the top bar is solder alloy 711 and the bottom bar is solder alloy 704.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 15
14
Elastic (Young's, Tensile) Modulus, GPa 51
51
Elongation at Break, % 19
30
Poisson's Ratio 0.36
0.36
Shear Modulus, GPa 19
19
Tensile Strength: Ultimate (UTS), MPa 49
55

Thermal Properties

Latent Heat of Fusion, J/g 61
62
Melting Completion (Liquidus), °C 220
240
Melting Onset (Solidus), °C 220
220
Specific Heat Capacity, J/kg-K 220
220
Thermal Conductivity, W/m-K 58
50
Thermal Expansion, µm/m-K 22
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 13
13
Electrical Conductivity: Equal Weight (Specific), % IACS 16
15

Otherwise Unclassified Properties

Density, g/cm3 7.4
7.5
Embodied Carbon, kg CO2/kg material 17
19
Embodied Energy, MJ/kg 290
320

Common Calculations

Stiffness to Weight: Axial, points 3.8
3.8
Stiffness to Weight: Bending, points 17
17
Strength to Weight: Axial, points 1.8
2.1
Strength to Weight: Bending, points 4.0
4.3
Thermal Diffusivity, mm2/s 35
30
Thermal Shock Resistance, points 3.1
3.5

Alloy Composition

Aluminum (Al), % 0 to 0.0010
0 to 0.0010
Antimony (Sb), % 0 to 0.1
0 to 0.1
Arsenic (As), % 0 to 0.030
0 to 0.030
Bismuth (Bi), % 0 to 0.1
0 to 0.1
Cadmium (Cd), % 0 to 0.0020
0 to 0.0020
Copper (Cu), % 0.3 to 0.7
0 to 0.050
Gold (Au), % 0 to 0.050
0 to 0.050
Indium (In), % 0 to 0.1
0 to 0.1
Iron (Fe), % 0 to 0.020
0 to 0.020
Lead (Pb), % 0 to 0.070
0 to 0.070
Nickel (Ni), % 0 to 0.010
0 to 0.010
Silver (Ag), % 2.8 to 3.2
4.8 to 5.2
Tin (Sn), % 95.6 to 96.9
94.3 to 95.2
Zinc (Zn), % 0 to 0.0010
0 to 0.0010