Solder Alloy 171 vs. ASTM A369 Grade FP91
Solder alloy 171 belongs to the otherwise unclassified metals classification, while ASTM A369 grade FP91 belongs to the iron alloys. There are 23 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.
For each property being compared, the top bar is solder alloy 171 and the bottom bar is ASTM A369 grade FP91.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 16 | |
| 200 |
| Elastic (Young's, Tensile) Modulus, GPa | 38 | |
| 190 |
| Elongation at Break, % | 45 | |
| 19 |
| Poisson's Ratio | 0.39 | |
| 0.28 |
| Shear Modulus, GPa | 14 | |
| 75 |
| Tensile Strength: Ultimate (UTS), MPa | 48 | |
| 670 |
Thermal Properties
| Latent Heat of Fusion, J/g | 47 | |
| 270 |
| Melting Completion (Liquidus), °C | 180 | |
| 1460 |
| Melting Onset (Solidus), °C | 180 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 190 | |
| 470 |
| Thermal Conductivity, W/m-K | 50 | |
| 26 |
| Thermal Expansion, µm/m-K | 24 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 12 | |
| 8.9 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 12 | |
| 10 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 13 | |
| 2.6 |
| Embodied Energy, MJ/kg | 210 | |
| 37 |
Common Calculations
| Stiffness to Weight: Axial, points | 2.4 | |
| 14 |
| Stiffness to Weight: Bending, points | 13 | |
| 25 |
| Strength to Weight: Axial, points | 1.5 | |
| 24 |
| Strength to Weight: Bending, points | 3.3 | |
| 22 |
| Thermal Diffusivity, mm2/s | 30 | |
| 6.9 |
| Thermal Shock Resistance, points | 3.7 | |
| 18 |
Alloy Composition
| Aluminum (Al), % | 0 to 0.0010 | |
| 0 to 0.020 |
| Antimony (Sb), % | 0 to 0.2 | |
| 0 |
| Arsenic (As), % | 0 to 0.030 | |
| 0 |
| Bismuth (Bi), % | 0 to 0.1 | |
| 0 |
| Cadmium (Cd), % | 0 to 0.0020 | |
| 0 |
| Carbon (C), % | 0 | |
| 0.080 to 0.12 |
| Chromium (Cr), % | 0 | |
| 8.0 to 9.5 |
| 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 | |
| 87.3 to 90.3 |
| Lead (Pb), % | 34.7 to 36.7 | |
| 0 |
| Manganese (Mn), % | 0 | |
| 0.3 to 0.6 |
| Molybdenum (Mo), % | 0 | |
| 0.85 to 1.1 |
| Nickel (Ni), % | 0 to 0.010 | |
| 0 to 0.4 |
| Niobium (Nb), % | 0 | |
| 0.060 to 0.1 |
| Nitrogen (N), % | 0 | |
| 0.030 to 0.070 |
| Phosphorus (P), % | 0 | |
| 0 to 0.025 |
| Silicon (Si), % | 0 | |
| 0.2 to 0.5 |
| Silver (Ag), % | 1.8 to 2.2 | |
| 0 |
| Sulfur (S), % | 0 | |
| 0 to 0.025 |
| Tin (Sn), % | 61.5 to 62.5 | |
| 0 |
| Titanium (Ti), % | 0 | |
| 0 to 0.010 |
| Vanadium (V), % | 0 | |
| 0.18 to 0.25 |
| Zinc (Zn), % | 0 to 0.0010 | |
| 0 |
| Zirconium (Zr), % | 0 | |
| 0 to 0.010 |