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Solder Alloy 121 vs. Nickel 690

Solder alloy 121 belongs to the otherwise unclassified metals classification, while nickel 690 belongs to the nickel alloys. There are 25 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 nickel 690.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 11
90
Elastic (Young's, Tensile) Modulus, GPa 21
200
Elongation at Break, % 25
3.4 to 34
Poisson's Ratio 0.43
0.28
Shear Modulus, GPa 7.5
79
Tensile Strength: Ultimate (UTS), MPa 32
640 to 990

Thermal Properties

Latent Heat of Fusion, J/g 29
320
Melting Completion (Liquidus), °C 290
1380
Melting Onset (Solidus), °C 230
1340
Specific Heat Capacity, J/kg-K 140
470
Thermal Conductivity, W/m-K 31
14
Thermal Expansion, µm/m-K 28
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.8
1.5
Electrical Conductivity: Equal Weight (Specific), % IACS 7.4
1.6

Otherwise Unclassified Properties

Base Metal Price, % relative 80
50
Density, g/cm3 11
8.3
Embodied Carbon, kg CO2/kg material 5.6
8.2
Embodied Energy, MJ/kg 93
120
Embodied Water, L/kg 580
290

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
21 to 33
Strength to Weight: Bending, points 2.1
20 to 27
Thermal Diffusivity, mm2/s 20
3.5
Thermal Shock Resistance, points 3.9
16 to 25

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 0.050
Chromium (Cr), % 0
27 to 31
Copper (Cu), % 0 to 0.080
0 to 0.5
Gold (Au), % 0 to 0.050
0
Indium (In), % 0 to 0.1
0
Iron (Fe), % 0 to 0.020
7.0 to 11
Lead (Pb), % 83.4 to 85.5
0
Manganese (Mn), % 0
0 to 0.5
Nickel (Ni), % 0 to 0.010
58 to 66
Silicon (Si), % 0
0 to 0.5
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