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Solder Alloy 151 vs. S21640 Stainless Steel

Solder alloy 151 belongs to the otherwise unclassified metals classification, while S21640 stainless steel belongs to the iron alloys. There are 23 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is solder alloy 151 and the bottom bar is S21640 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 39
200
Elongation at Break, % 37
46
Poisson's Ratio 0.37
0.28
Shear Modulus, GPa 14
78
Tensile Strength: Ultimate (UTS), MPa 46
740

Thermal Properties

Latent Heat of Fusion, J/g 47
290
Melting Completion (Liquidus), °C 150
1430
Melting Onset (Solidus), °C 150
1380
Specific Heat Capacity, J/kg-K 190
480
Thermal Conductivity, W/m-K 44
15
Thermal Expansion, µm/m-K 26
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 10
2.8

Otherwise Unclassified Properties

Density, g/cm3 8.8
7.7
Embodied Carbon, kg CO2/kg material 9.2
3.6
Embodied Energy, MJ/kg 160
51
Embodied Water, L/kg 920
150

Common Calculations

Stiffness to Weight: Axial, points 2.5
14
Stiffness to Weight: Bending, points 13
25
Strength to Weight: Axial, points 1.4
27
Strength to Weight: Bending, points 3.2
23
Thermal Diffusivity, mm2/s 26
4.0
Thermal Shock Resistance, points 3.2
16

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), % 17.5 to 18.5
0
Carbon (C), % 0
0 to 0.080
Chromium (Cr), % 0
17.5 to 19.5
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
63 to 74.3
Lead (Pb), % 30.3 to 33
0
Manganese (Mn), % 0
3.5 to 6.5
Molybdenum (Mo), % 0
0.5 to 2.0
Nickel (Ni), % 0 to 0.010
4.0 to 6.5
Niobium (Nb), % 0
0.1 to 1.0
Nitrogen (N), % 0
0.080 to 0.3
Phosphorus (P), % 0
0 to 0.060
Silicon (Si), % 0
0 to 1.0
Silver (Ag), % 0 to 0.1
0
Sulfur (S), % 0
0 to 0.030
Tin (Sn), % 49.5 to 50.5
0
Zinc (Zn), % 0 to 0.0010
0