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Solder Alloy 121 vs. AWS E320LR

Solder alloy 121 belongs to the otherwise unclassified metals classification, while AWS E320LR belongs to the iron alloys. There are 20 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is solder alloy 121 and the bottom bar is AWS E320LR.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 21
200
Elongation at Break, % 25
34
Poisson's Ratio 0.43
0.28
Shear Modulus, GPa 7.5
77
Tensile Strength: Ultimate (UTS), MPa 32
580

Thermal Properties

Latent Heat of Fusion, J/g 29
300
Melting Completion (Liquidus), °C 290
1410
Melting Onset (Solidus), °C 230
1360
Specific Heat Capacity, J/kg-K 140
460
Thermal Expansion, µm/m-K 28
14

Otherwise Unclassified Properties

Base Metal Price, % relative 80
36
Density, g/cm3 11
8.2
Embodied Carbon, kg CO2/kg material 5.6
6.2
Embodied Energy, MJ/kg 93
87
Embodied Water, L/kg 580
220

Common Calculations

Stiffness to Weight: Axial, points 1.1
13
Stiffness to Weight: Bending, points 8.6
24
Strength to Weight: Axial, points 0.84
20
Strength to Weight: Bending, points 2.1
19
Thermal Shock Resistance, points 3.9
15

Alloy Composition

Aluminum (Al), % 0 to 0.0010
0
Antimony (Sb), % 0 to 0.5
0
Arsenic (As), % 0 to 0.030
0
Bismuth (Bi), % 0 to 0.25
0
Cadmium (Cd), % 0 to 0.0050
0
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0
19 to 21
Copper (Cu), % 0 to 0.080
3.0 to 4.0
Gold (Au), % 0 to 0.050
0
Indium (In), % 0 to 0.1
0
Iron (Fe), % 0 to 0.020
32.7 to 42.5
Lead (Pb), % 83.4 to 85.5
0
Manganese (Mn), % 0
1.5 to 2.5
Molybdenum (Mo), % 0
2.0 to 3.0
Nickel (Ni), % 0 to 0.010
32 to 36
Niobium (Nb), % 0
0 to 0.4
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0
0 to 0.3
Silver (Ag), % 0 to 0.1
0
Sulfur (S), % 0
0 to 0.015
Tin (Sn), % 14.5 to 15.5
0
Zinc (Zn), % 0 to 0.0010
0