Solder Alloy 401 vs. Solder Alloy 501
Both solder alloy 401 and solder alloy 501 are otherwise unclassified metals. Both are furnished in the as-fabricated (no temper or treatment) condition. Their average alloy composition is basically identical.
For each property being compared, the top bar is solder alloy 401 and the bottom bar is solder alloy 501.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 9.0 | |
| 14 |
| Elastic (Young's, Tensile) Modulus, GPa | 50 | |
| 51 |
| Elongation at Break, % | 21 | |
| 22 |
| Poisson's Ratio | 0.36 | |
| 0.36 |
| Shear Modulus, GPa | 19 | |
| 19 |
| Tensile Strength: Ultimate (UTS), MPa | 29 | |
| 29 |
Thermal Properties
| Latent Heat of Fusion, J/g | 60 | |
| 60 |
| Melting Completion (Liquidus), °C | 230 | |
| 230 |
| Melting Onset (Solidus), °C | 230 | |
| 220 |
| Specific Heat Capacity, J/kg-K | 220 | |
| 220 |
| Thermal Conductivity, W/m-K | 66 | |
| 67 |
| Thermal Expansion, µm/m-K | 22 | |
| 22 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 14 | |
| 14 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 17 | |
| 17 |
Otherwise Unclassified Properties
| Density, g/cm3 | 7.3 | |
| 7.3 |
| Embodied Carbon, kg CO2/kg material | 15 | |
| 15 |
| Embodied Energy, MJ/kg | 250 | |
| 260 |
| Embodied Water, L/kg | 1200 | |
| 1390 |
Common Calculations
| Stiffness to Weight: Axial, points | 3.8 | |
| 3.8 |
| Stiffness to Weight: Bending, points | 17 | |
| 17 |
| Strength to Weight: Axial, points | 1.1 | |
| 1.1 |
| Strength to Weight: Bending, points | 2.9 | |
| 2.9 |
| Thermal Diffusivity, mm2/s | 40 | |
| 41 |
| Thermal Shock Resistance, points | 1.9 | |
| 1.9 |
Alloy Composition
| Aluminum (Al), % | 0 to 0.0010 | |
| 0 to 0.0010 |
| Antimony (Sb), % | 0 to 0.1 | |
| 0 to 0.1 |
| Arsenic (As), % | 0 to 0.030 | |
| 0 to 0.030 |
| Bismuth (Bi), % | 0 to 0.1 | |
| 0 to 0.060 |
| Cadmium (Cd), % | 0 to 0.0020 | |
| 0 to 0.0020 |
| Copper (Cu), % | 0.5 to 0.9 | |
| 0.5 to 0.9 |
| Gold (Au), % | 0 to 0.050 | |
| 0 to 0.050 |
| Indium (In), % | 0 to 0.1 | |
| 0 to 0.1 |
| Iron (Fe), % | 0 to 0.020 | |
| 0 to 0.020 |
| Lead (Pb), % | 0 to 0.070 | |
| 0 to 0.070 |
| Nickel (Ni), % | 0 to 0.010 | |
| 0 to 0.010 |
| Silver (Ag), % | 0 to 0.1 | |
| 0.2 to 0.4 |
| Tin (Sn), % | 98.5 to 99.5 | |
| 98.3 to 99.3 |
| Zinc (Zn), % | 0 to 0.0010 | |
| 0 to 0.0010 |