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Solder Alloy 704 vs. Solder Alloy 711

Both solder alloy 704 and solder alloy 711 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 704 and the bottom bar is solder alloy 711.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Electrical Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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

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 to 0.050
0.3 to 0.7
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), % 4.8 to 5.2
2.8 to 3.2
Tin (Sn), % 94.3 to 95.2
95.6 to 96.9
Zinc (Zn), % 0 to 0.0010
0 to 0.0010