Solder Alloy 721 vs. C99600 Bronze
Solder alloy 721 belongs to the otherwise unclassified metals classification, while C99600 bronze belongs to the copper alloys. There are 18 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.
For each property being compared, the top bar is solder alloy 721 and the bottom bar is C99600 bronze.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 51 | |
| 150 |
| Elongation at Break, % | 17 | |
| 27 to 34 |
| Poisson's Ratio | 0.36 | |
| 0.34 |
| Shear Modulus, GPa | 19 | |
| 56 |
| Tensile Strength: Ultimate (UTS), MPa | 50 | |
| 560 |
Thermal Properties
| Latent Heat of Fusion, J/g | 61 | |
| 240 |
| Melting Completion (Liquidus), °C | 220 | |
| 1100 |
| Melting Onset (Solidus), °C | 210 | |
| 1050 |
| Specific Heat Capacity, J/kg-K | 220 | |
| 440 |
| Thermal Expansion, µm/m-K | 22 | |
| 19 |
Otherwise Unclassified Properties
| Density, g/cm3 | 7.4 | |
| 8.1 |
| Embodied Carbon, kg CO2/kg material | 17 | |
| 3.2 |
| Embodied Energy, MJ/kg | 280 | |
| 51 |
Common Calculations
| Stiffness to Weight: Axial, points | 3.8 | |
| 10 |
| Stiffness to Weight: Bending, points | 17 | |
| 22 |
| Strength to Weight: Axial, points | 1.9 | |
| 19 |
| Strength to Weight: Bending, points | 4.1 | |
| 19 |
| Thermal Shock Resistance, points | 3.2 | |
| 14 |
Alloy Composition
| Aluminum (Al), % | 0 to 0.0010 | |
| 1.0 to 2.8 |
| 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 0.050 |
| Cobalt (Co), % | 0 | |
| 0 to 0.2 |
| Copper (Cu), % | 0.3 to 0.7 | |
| 50.8 to 60 |
| Gold (Au), % | 0 to 0.050 | |
| 0 |
| Indium (In), % | 0 to 0.1 | |
| 0 |
| Iron (Fe), % | 0 to 0.020 | |
| 0 to 0.2 |
| Lead (Pb), % | 0 to 0.070 | |
| 0 to 0.020 |
| Manganese (Mn), % | 0 | |
| 39 to 45 |
| Nickel (Ni), % | 0 to 0.010 | |
| 0 to 0.2 |
| Silicon (Si), % | 0 | |
| 0 to 0.1 |
| Silver (Ag), % | 2.3 to 2.7 | |
| 0 |
| Tin (Sn), % | 95 to 96.6 | |
| 0 to 0.1 |
| Zinc (Zn), % | 0 to 0.0010 | |
| 0 to 0.2 |
| Residuals, % | 0 | |
| 0 to 0.3 |