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AWS E312 vs. Solder Alloy 121

AWS E312 belongs to the iron alloys classification, while solder alloy 121 belongs to the otherwise unclassified metals. 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 AWS E312 and the bottom bar is solder alloy 121.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
21
Elongation at Break, % 25
25
Poisson's Ratio 0.27
0.43
Shear Modulus, GPa 80
7.5
Tensile Strength: Ultimate (UTS), MPa 740
32

Thermal Properties

Latent Heat of Fusion, J/g 310
29
Melting Completion (Liquidus), °C 1410
290
Melting Onset (Solidus), °C 1360
230
Specific Heat Capacity, J/kg-K 480
140
Thermal Expansion, µm/m-K 15
28

Otherwise Unclassified Properties

Base Metal Price, % relative 20
80
Density, g/cm3 7.7
11
Embodied Carbon, kg CO2/kg material 3.6
5.6
Embodied Energy, MJ/kg 52
93
Embodied Water, L/kg 200
580

Common Calculations

Stiffness to Weight: Axial, points 15
1.1
Stiffness to Weight: Bending, points 25
8.6
Strength to Weight: Axial, points 27
0.84
Strength to Weight: Bending, points 24
2.1
Thermal Shock Resistance, points 18
3.9

Alloy Composition

Aluminum (Al), % 0
0 to 0.0010
Antimony (Sb), % 0
0 to 0.5
Arsenic (As), % 0
0 to 0.030
Bismuth (Bi), % 0
0 to 0.25
Cadmium (Cd), % 0
0 to 0.0050
Carbon (C), % 0 to 0.15
0
Chromium (Cr), % 28 to 32
0
Copper (Cu), % 0 to 0.75
0 to 0.080
Gold (Au), % 0
0 to 0.050
Indium (In), % 0
0 to 0.1
Iron (Fe), % 52.3 to 63.5
0 to 0.020
Lead (Pb), % 0
83.4 to 85.5
Manganese (Mn), % 0.5 to 2.5
0
Molybdenum (Mo), % 0 to 0.75
0
Nickel (Ni), % 8.0 to 10.5
0 to 0.010
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0
Silver (Ag), % 0
0 to 0.1
Sulfur (S), % 0 to 0.030
0
Tin (Sn), % 0
14.5 to 15.5
Zinc (Zn), % 0
0 to 0.0010