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Solder Alloy 704 vs. AWS E240

Solder alloy 704 belongs to the otherwise unclassified metals classification, while AWS E240 belongs to the iron alloys. There are 20 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 AWS E240.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 51
200
Elongation at Break, % 30
17
Poisson's Ratio 0.36
0.28
Shear Modulus, GPa 19
77
Tensile Strength: Ultimate (UTS), MPa 55
770

Thermal Properties

Latent Heat of Fusion, J/g 62
290
Melting Completion (Liquidus), °C 240
1390
Melting Onset (Solidus), °C 220
1350
Specific Heat Capacity, J/kg-K 220
480
Thermal Conductivity, W/m-K 50
15
Thermal Expansion, µm/m-K 22
15

Otherwise Unclassified Properties

Density, g/cm3 7.5
7.7
Embodied Carbon, kg CO2/kg material 19
3.0
Embodied Energy, MJ/kg 320
42

Common Calculations

Stiffness to Weight: Axial, points 3.8
14
Stiffness to Weight: Bending, points 17
25
Strength to Weight: Axial, points 2.1
28
Strength to Weight: Bending, points 4.3
24
Thermal Diffusivity, mm2/s 30
3.9
Thermal Shock Resistance, points 3.5
19

Alloy Composition

Aluminum (Al), % 0 to 0.0010
0
Antimony (Sb), % 0 to 0.1
0
Arsenic (As), % 0 to 0.030
0
Bismuth (Bi), % 0 to 0.1
0
Cadmium (Cd), % 0 to 0.0020
0
Carbon (C), % 0
0 to 0.060
Chromium (Cr), % 0
17 to 19
Copper (Cu), % 0 to 0.050
0 to 0.75
Gold (Au), % 0 to 0.050
0
Indium (In), % 0 to 0.1
0
Iron (Fe), % 0 to 0.020
58.6 to 68.4
Lead (Pb), % 0 to 0.070
0
Manganese (Mn), % 0
10.5 to 13.5
Molybdenum (Mo), % 0
0 to 0.75
Nickel (Ni), % 0 to 0.010
4.0 to 6.0
Nitrogen (N), % 0
0.1 to 0.3
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0
0 to 1.0
Silver (Ag), % 4.8 to 5.2
0
Sulfur (S), % 0
0 to 0.030
Tin (Sn), % 94.3 to 95.2
0
Zinc (Zn), % 0 to 0.0010
0