Solder Alloy 137 vs. AWS ENiCu-7
Solder alloy 137 belongs to the otherwise unclassified metals classification, while AWS ENiCu-7 belongs to the nickel alloys.
For each property being compared, the top bar is solder alloy 137 and the bottom bar is AWS ENiCu-7.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 24 | |
| 160 |
| Elongation at Break, % | 19 | |
| 34 |
| Poisson's Ratio | 0.42 | |
| 0.32 |
| Shear Modulus, GPa | 8.3 | |
| 62 |
| Tensile Strength: Ultimate (UTS), MPa | 34 | |
| 550 |
Thermal Properties
| Latent Heat of Fusion, J/g | 33 | |
| 280 |
| Melting Completion (Liquidus), °C | 270 | |
| 1270 |
| Melting Onset (Solidus), °C | 190 | |
| 1230 |
| Specific Heat Capacity, J/kg-K | 150 | |
| 430 |
| Thermal Conductivity, W/m-K | 38 | |
| 21 |
| Thermal Expansion, µm/m-K | 27 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 8.9 | |
| 3.3 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 7.7 | |
| 3.3 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 85 | |
| 50 |
| Density, g/cm3 | 10 | |
| 8.7 |
| Embodied Carbon, kg CO2/kg material | 6.3 | |
| 8.0 |
| Embodied Energy, MJ/kg | 100 | |
| 110 |
| Embodied Water, L/kg | 660 | |
| 250 |
Common Calculations
| Stiffness to Weight: Axial, points | 1.3 | |
| 10 |
| Stiffness to Weight: Bending, points | 9.2 | |
| 21 |
| Strength to Weight: Axial, points | 0.9 | |
| 17 |
| Strength to Weight: Bending, points | 2.2 | |
| 17 |
| Thermal Diffusivity, mm2/s | 25 | |
| 5.5 |
| Thermal Shock Resistance, points | 3.7 | |
| 18 |
Alloy Composition
| Aluminum (Al), % | 0 to 0.0010 | |
| 0 to 0.75 |
| Antimony (Sb), % | 0.5 to 3.0 | |
| 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 0.1 |
| Copper (Cu), % | 0 to 0.080 | |
| 20.6 to 38 |
| Gold (Au), % | 0 to 0.050 | |
| 0 |
| Indium (In), % | 0 to 0.1 | |
| 0 |
| Iron (Fe), % | 0 to 0.020 | |
| 0 to 2.5 |
| Lead (Pb), % | 75.9 to 80 | |
| 0 |
| Manganese (Mn), % | 0 | |
| 0 to 4.0 |
| Nickel (Ni), % | 0 to 0.010 | |
| 62 to 69 |
| Phosphorus (P), % | 0 | |
| 0 to 0.020 |
| Silicon (Si), % | 0 | |
| 0 to 1.5 |
| Silver (Ag), % | 0 to 0.1 | |
| 0 |
| Sulfur (S), % | 0 | |
| 0 to 0.015 |
| Tin (Sn), % | 19.5 to 20.5 | |
| 0 |
| Titanium (Ti), % | 0 | |
| 0 to 1.0 |
| Zinc (Zn), % | 0 to 0.0010 | |
| 0 |
| Residuals, % | 0 | |
| 0 to 0.5 |