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Solder Alloy 191 vs. S31727 Stainless Steel

Solder alloy 191 belongs to the otherwise unclassified metals classification, while S31727 stainless steel belongs to the iron alloys. There are 18 material properties with values for both materials. Properties with values for just one material (17, in this case) are not shown.

For each property being compared, the top bar is solder alloy 191 and the bottom bar is S31727 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 19
200
Elongation at Break, % 32
40
Poisson's Ratio 0.43
0.28
Shear Modulus, GPa 6.5
78
Tensile Strength: Ultimate (UTS), MPa 29
630

Thermal Properties

Latent Heat of Fusion, J/g 27
290
Melting Completion (Liquidus), °C 300
1440
Melting Onset (Solidus), °C 300
1390
Specific Heat Capacity, J/kg-K 130
470
Thermal Expansion, µm/m-K 29
16

Otherwise Unclassified Properties

Density, g/cm3 11
8.0
Embodied Carbon, kg CO2/kg material 5.8
4.7
Embodied Energy, MJ/kg 95
64

Common Calculations

Stiffness to Weight: Axial, points 0.93
14
Stiffness to Weight: Bending, points 8.0
24
Strength to Weight: Axial, points 0.72
22
Strength to Weight: Bending, points 1.9
20
Thermal Shock Resistance, points 3.9
14

Alloy Composition

Aluminum (Al), % 0 to 0.0010
0
Antimony (Sb), % 0 to 0.2
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
17.5 to 19
Copper (Cu), % 0 to 0.080
2.8 to 4.0
Gold (Au), % 0 to 0.050
0
Indium (In), % 0 to 0.1
0
Iron (Fe), % 0 to 0.020
53.7 to 61.3
Lead (Pb), % 92.4 to 94
0
Manganese (Mn), % 0
0 to 1.0
Molybdenum (Mo), % 0
3.8 to 4.5
Nickel (Ni), % 0 to 0.010
14.5 to 16.5
Nitrogen (N), % 0
0.15 to 0.21
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0
0 to 1.0
Silver (Ag), % 1.2 to 1.8
0
Sulfur (S), % 0
0 to 0.030
Tin (Sn), % 4.8 to 5.2
0
Zinc (Zn), % 0 to 0.0010
0