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Solder Alloy 704 vs. SAE-AISI S7 Steel

Solder alloy 704 belongs to the otherwise unclassified metals classification, while SAE-AISI S7 steel belongs to the iron alloys. There are 21 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is solder alloy 704 and the bottom bar is SAE-AISI S7 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 51
190
Poisson's Ratio 0.36
0.29
Shear Modulus, GPa 19
74
Tensile Strength: Ultimate (UTS), MPa 55
670 to 2030

Thermal Properties

Latent Heat of Fusion, J/g 62
260
Melting Completion (Liquidus), °C 240
1460
Melting Onset (Solidus), °C 220
1420
Specific Heat Capacity, J/kg-K 220
470
Thermal Conductivity, W/m-K 50
40
Thermal Expansion, µm/m-K 22
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 13
7.8
Electrical Conductivity: Equal Weight (Specific), % IACS 15
9.0

Otherwise Unclassified Properties

Density, g/cm3 7.5
7.8
Embodied Carbon, kg CO2/kg material 19
2.3
Embodied Energy, MJ/kg 320
31

Common Calculations

Stiffness to Weight: Axial, points 3.8
14
Stiffness to Weight: Bending, points 17
25
Strength to Weight: Axial, points 2.1
24 to 72
Strength to Weight: Bending, points 4.3
22 to 46
Thermal Diffusivity, mm2/s 30
11
Thermal Shock Resistance, points 3.5
22 to 66

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
0.45 to 0.55
Chromium (Cr), % 0
3.0 to 3.5
Copper (Cu), % 0 to 0.050
0 to 0.25
Gold (Au), % 0 to 0.050
0
Indium (In), % 0 to 0.1
0
Iron (Fe), % 0 to 0.020
91.6 to 94.9
Lead (Pb), % 0 to 0.070
0
Manganese (Mn), % 0
0.2 to 0.9
Molybdenum (Mo), % 0
1.3 to 1.8
Nickel (Ni), % 0 to 0.010
0
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0
0.2 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
Vanadium (V), % 0
0 to 0.3
Zinc (Zn), % 0 to 0.0010
0