ASTM A369 Grade FPB vs. Solder Alloy 121
ASTM A369 grade FPB belongs to the iron alloys classification, while solder alloy 121 belongs to the otherwise unclassified metals. 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 ASTM A369 grade FPB and the bottom bar is solder alloy 121.
Metric UnitsUS Customary Units
Mechanical Properties
Brinell Hardness | 140 | |
11 |
Elastic (Young's, Tensile) Modulus, GPa | 190 | |
21 |
Elongation at Break, % | 19 | |
25 |
Poisson's Ratio | 0.29 | |
0.43 |
Shear Modulus, GPa | 73 | |
7.5 |
Tensile Strength: Ultimate (UTS), MPa | 470 | |
32 |
Thermal Properties
Latent Heat of Fusion, J/g | 250 | |
29 |
Melting Completion (Liquidus), °C | 1460 | |
290 |
Melting Onset (Solidus), °C | 1420 | |
230 |
Specific Heat Capacity, J/kg-K | 470 | |
140 |
Thermal Conductivity, W/m-K | 52 | |
31 |
Thermal Expansion, µm/m-K | 12 | |
28 |
Electrical Properties
Electrical Conductivity: Equal Volume, % IACS | 7.1 | |
8.8 |
Electrical Conductivity: Equal Weight (Specific), % IACS | 8.1 | |
7.4 |
Otherwise Unclassified Properties
Base Metal Price, % relative | 1.8 | |
80 |
Density, g/cm3 | 7.8 | |
11 |
Embodied Carbon, kg CO2/kg material | 1.4 | |
5.6 |
Embodied Energy, MJ/kg | 18 | |
93 |
Embodied Water, L/kg | 46 | |
580 |
Common Calculations
Stiffness to Weight: Axial, points | 13 | |
1.1 |
Stiffness to Weight: Bending, points | 24 | |
8.6 |
Strength to Weight: Axial, points | 17 | |
0.84 |
Strength to Weight: Bending, points | 17 | |
2.1 |
Thermal Diffusivity, mm2/s | 14 | |
20 |
Thermal Shock Resistance, points | 15 | |
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 0.3 | |
0 |
Copper (Cu), % | 0 | |
0 to 0.080 |
Gold (Au), % | 0 | |
0 to 0.050 |
Indium (In), % | 0 | |
0 to 0.1 |
Iron (Fe), % | 98.1 to 99.61 | |
0 to 0.020 |
Lead (Pb), % | 0 | |
83.4 to 85.5 |
Manganese (Mn), % | 0.29 to 1.1 | |
0 |
Nickel (Ni), % | 0 | |
0 to 0.010 |
Phosphorus (P), % | 0 to 0.035 | |
0 |
Silicon (Si), % | 0.1 to 0.5 | |
0 |
Silver (Ag), % | 0 | |
0 to 0.1 |
Sulfur (S), % | 0 to 0.035 | |
0 |
Tin (Sn), % | 0 | |
14.5 to 15.5 |
Zinc (Zn), % | 0 | |
0 to 0.0010 |