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Solder Alloy 191 vs. S40977 Stainless Steel

Solder alloy 191 belongs to the otherwise unclassified metals classification, while S40977 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 191 and the bottom bar is S40977 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 19
190
Elongation at Break, % 32
21
Poisson's Ratio 0.43
0.28
Shear Modulus, GPa 6.5
76
Tensile Strength: Ultimate (UTS), MPa 29
510

Thermal Properties

Latent Heat of Fusion, J/g 27
270
Melting Completion (Liquidus), °C 300
1440
Melting Onset (Solidus), °C 300
1400
Specific Heat Capacity, J/kg-K 130
480
Thermal Conductivity, W/m-K 24
25
Thermal Expansion, µm/m-K 29
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.8
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 7.2
3.3

Otherwise Unclassified Properties

Density, g/cm3 11
7.8
Embodied Carbon, kg CO2/kg material 5.8
1.9
Embodied Energy, MJ/kg 95
27

Common Calculations

Stiffness to Weight: Axial, points 0.93
14
Stiffness to Weight: Bending, points 8.0
25
Strength to Weight: Axial, points 0.72
18
Strength to Weight: Bending, points 1.9
18
Thermal Diffusivity, mm2/s 16
6.7
Thermal Shock Resistance, points 3.9
18

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
10.5 to 12.5
Copper (Cu), % 0 to 0.080
0
Gold (Au), % 0 to 0.050
0
Indium (In), % 0 to 0.1
0
Iron (Fe), % 0 to 0.020
83.9 to 89.2
Lead (Pb), % 92.4 to 94
0
Manganese (Mn), % 0
0 to 1.5
Nickel (Ni), % 0 to 0.010
0.3 to 1.0
Nitrogen (N), % 0
0 to 0.030
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0
0 to 1.0
Silver (Ag), % 1.2 to 1.8
0
Sulfur (S), % 0
0 to 0.015
Tin (Sn), % 4.8 to 5.2
0
Zinc (Zn), % 0 to 0.0010
0