Solder Alloy 721 vs. AWS E383
Solder alloy 721 belongs to the otherwise unclassified metals classification, while AWS E383 belongs to the iron alloys. There are 20 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.
For each property being compared, the top bar is solder alloy 721 and the bottom bar is AWS E383.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 51 | |
| 210 |
| Elongation at Break, % | 17 | |
| 34 |
| Poisson's Ratio | 0.36 | |
| 0.28 |
| Shear Modulus, GPa | 19 | |
| 80 |
| Tensile Strength: Ultimate (UTS), MPa | 50 | |
| 580 |
Thermal Properties
| Latent Heat of Fusion, J/g | 61 | |
| 320 |
| Melting Completion (Liquidus), °C | 220 | |
| 1420 |
| Melting Onset (Solidus), °C | 210 | |
| 1370 |
| Specific Heat Capacity, J/kg-K | 220 | |
| 470 |
| Thermal Conductivity, W/m-K | 56 | |
| 12 |
| Thermal Expansion, µm/m-K | 22 | |
| 14 |
Otherwise Unclassified Properties
| Density, g/cm3 | 7.4 | |
| 8.1 |
| Embodied Carbon, kg CO2/kg material | 17 | |
| 6.4 |
| Embodied Energy, MJ/kg | 280 | |
| 89 |
Common Calculations
| Stiffness to Weight: Axial, points | 3.8 | |
| 14 |
| Stiffness to Weight: Bending, points | 17 | |
| 24 |
| Strength to Weight: Axial, points | 1.9 | |
| 20 |
| Strength to Weight: Bending, points | 4.1 | |
| 19 |
| Thermal Diffusivity, mm2/s | 34 | |
| 3.1 |
| Thermal Shock Resistance, points | 3.2 | |
| 15 |
Alloy Composition
| Aluminum (Al), % | 0 to 0.0010 | |
| 0 |
| Antimony (Sb), % | 0 to 0.1 | |
| 0 |
| Arsenic (As), % | 0 to 0.030 | |
| 0 |
| Bismuth (Bi), % | 0.8 to 1.2 | |
| 0 |
| Cadmium (Cd), % | 0 to 0.0020 | |
| 0 |
| Carbon (C), % | 0 | |
| 0 to 0.030 |
| Chromium (Cr), % | 0 | |
| 26.5 to 29 |
| Copper (Cu), % | 0.3 to 0.7 | |
| 0.6 to 1.5 |
| Gold (Au), % | 0 to 0.050 | |
| 0 |
| Indium (In), % | 0 to 0.1 | |
| 0 |
| Iron (Fe), % | 0 to 0.020 | |
| 28.8 to 39.2 |
| Lead (Pb), % | 0 to 0.070 | |
| 0 |
| Manganese (Mn), % | 0 | |
| 0.5 to 2.5 |
| Molybdenum (Mo), % | 0 | |
| 3.2 to 4.2 |
| Nickel (Ni), % | 0 to 0.010 | |
| 30 to 33 |
| Phosphorus (P), % | 0 | |
| 0 to 0.020 |
| Silicon (Si), % | 0 | |
| 0 to 0.9 |
| Silver (Ag), % | 2.3 to 2.7 | |
| 0 |
| Sulfur (S), % | 0 | |
| 0 to 0.020 |
| Tin (Sn), % | 95 to 96.6 | |
| 0 |
| Zinc (Zn), % | 0 to 0.0010 | |
| 0 |