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Solder Alloy 704 vs. S31266 Stainless Steel

Solder alloy 704 belongs to the otherwise unclassified metals classification, while S31266 stainless steel belongs to the iron alloys. There are 22 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is solder alloy 704 and the bottom bar is S31266 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 51
210
Elongation at Break, % 30
40
Poisson's Ratio 0.36
0.28
Shear Modulus, GPa 19
81
Tensile Strength: Ultimate (UTS), MPa 55
860

Thermal Properties

Latent Heat of Fusion, J/g 62
310
Melting Completion (Liquidus), °C 240
1470
Melting Onset (Solidus), °C 220
1420
Specific Heat Capacity, J/kg-K 220
460
Thermal Conductivity, W/m-K 50
12
Thermal Expansion, µm/m-K 22
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 13
1.8
Electrical Conductivity: Equal Weight (Specific), % IACS 15
2.0

Otherwise Unclassified Properties

Density, g/cm3 7.5
8.2
Embodied Carbon, kg CO2/kg material 19
6.5
Embodied Energy, MJ/kg 320
89

Common Calculations

Stiffness to Weight: Axial, points 3.8
14
Stiffness to Weight: Bending, points 17
24
Strength to Weight: Axial, points 2.1
29
Strength to Weight: Bending, points 4.3
24
Thermal Diffusivity, mm2/s 30
3.1
Thermal Shock Resistance, points 3.5
18

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 0.030
Chromium (Cr), % 0
23 to 25
Copper (Cu), % 0 to 0.050
1.0 to 2.5
Gold (Au), % 0 to 0.050
0
Indium (In), % 0 to 0.1
0
Iron (Fe), % 0 to 0.020
34.1 to 46
Lead (Pb), % 0 to 0.070
0
Manganese (Mn), % 0
2.0 to 4.0
Molybdenum (Mo), % 0
5.2 to 6.2
Nickel (Ni), % 0 to 0.010
21 to 24
Nitrogen (N), % 0
0.35 to 0.6
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0
0 to 1.0
Silver (Ag), % 4.8 to 5.2
0
Sulfur (S), % 0
0 to 0.020
Tin (Sn), % 94.3 to 95.2
0
Tungsten (W), % 0
1.5 to 2.5
Zinc (Zn), % 0 to 0.0010
0