Solder Alloy 135 vs. Solder Alloy 124
Both solder alloy 135 and solder alloy 124 are otherwise unclassified metals. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 71% of their average alloy composition in common.
For each property being compared, the top bar is solder alloy 135 and the bottom bar is solder alloy 124.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 27 | |
| 17 |
| Elongation at Break, % | 20 | |
| 46 |
| Poisson's Ratio | 0.41 | |
| 0.44 |
| Shear Modulus, GPa | 9.5 | |
| 5.8 |
| Tensile Strength: Ultimate (UTS), MPa | 35 | |
| 27 |
Thermal Properties
| Latent Heat of Fusion, J/g | 36 | |
| 24 |
| Melting Completion (Liquidus), °C | 250 | |
| 330 |
| Melting Onset (Solidus), °C | 190 | |
| 320 |
| Specific Heat Capacity, J/kg-K | 160 | |
| 130 |
| Thermal Conductivity, W/m-K | 42 | |
| 22 |
| Thermal Expansion, µm/m-K | 27 | |
| 29 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 9.5 | |
| 9.6 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.5 | |
| 7.7 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 90 | |
| 70 |
| Density, g/cm3 | 10 | |
| 11 |
| Embodied Carbon, kg CO2/kg material | 7.3 | |
| 4.1 |
| Embodied Energy, MJ/kg | 120 | |
| 68 |
| Embodied Water, L/kg | 720 | |
| 470 |
Common Calculations
| Stiffness to Weight: Axial, points | 1.5 | |
| 0.83 |
| Stiffness to Weight: Bending, points | 9.9 | |
| 7.6 |
| Strength to Weight: Axial, points | 1.0 | |
| 0.65 |
| Strength to Weight: Bending, points | 2.4 | |
| 1.8 |
| Thermal Diffusivity, mm2/s | 27 | |
| 15 |
| Thermal Shock Resistance, points | 3.5 | |
| 3.9 |
Alloy Composition
| Aluminum (Al), % | 0 to 0.0010 | |
| 0 to 0.0010 |
| Antimony (Sb), % | 0.5 to 1.8 | |
| 0 to 0.12 |
| Arsenic (As), % | 0 to 0.030 | |
| 0 to 0.030 |
| Bismuth (Bi), % | 0 to 0.25 | |
| 0 to 0.1 |
| Cadmium (Cd), % | 0 to 0.0050 | |
| 0 to 0.0020 |
| Copper (Cu), % | 0 to 0.080 | |
| 0 to 0.080 |
| 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), % | 67.1 to 70 | |
| 97.2 to 98.2 |
| Nickel (Ni), % | 0 to 0.010 | |
| 0 to 0.010 |
| Silver (Ag), % | 0 to 0.1 | |
| 0 to 0.1 |
| Tin (Sn), % | 29.5 to 30.5 | |
| 1.8 to 2.2 |
| Zinc (Zn), % | 0 to 0.0010 | |
| 0 to 0.0010 |