Solder Alloy 721 vs. Grade 20 Titanium
Solder alloy 721 belongs to the otherwise unclassified metals classification, while grade 20 titanium belongs to the titanium alloys. There are 18 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.
For each property being compared, the top bar is solder alloy 721 and the bottom bar is grade 20 titanium.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 51 | |
| 120 |
| Elongation at Break, % | 17 | |
| 5.7 to 17 |
| Poisson's Ratio | 0.36 | |
| 0.32 |
| Shear Modulus, GPa | 19 | |
| 47 |
| Tensile Strength: Ultimate (UTS), MPa | 50 | |
| 900 to 1270 |
Thermal Properties
| Latent Heat of Fusion, J/g | 61 | |
| 400 |
| Melting Completion (Liquidus), °C | 220 | |
| 1660 |
| Melting Onset (Solidus), °C | 210 | |
| 1600 |
| Specific Heat Capacity, J/kg-K | 220 | |
| 520 |
| Thermal Expansion, µm/m-K | 22 | |
| 9.6 |
Otherwise Unclassified Properties
| Density, g/cm3 | 7.4 | |
| 5.0 |
| Embodied Carbon, kg CO2/kg material | 17 | |
| 52 |
| Embodied Energy, MJ/kg | 280 | |
| 860 |
Common Calculations
| Stiffness to Weight: Axial, points | 3.8 | |
| 14 |
| Stiffness to Weight: Bending, points | 17 | |
| 33 |
| Strength to Weight: Axial, points | 1.9 | |
| 50 to 70 |
| Strength to Weight: Bending, points | 4.1 | |
| 41 to 52 |
| Thermal Shock Resistance, points | 3.2 | |
| 55 to 77 |
Alloy Composition
| Aluminum (Al), % | 0 to 0.0010 | |
| 3.0 to 4.0 |
| 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 0.050 |
| Chromium (Cr), % | 0 | |
| 5.5 to 6.5 |
| Copper (Cu), % | 0.3 to 0.7 | |
| 0 |
| Gold (Au), % | 0 to 0.050 | |
| 0 |
| Hydrogen (H), % | 0 | |
| 0 to 0.020 |
| Indium (In), % | 0 to 0.1 | |
| 0 |
| Iron (Fe), % | 0 to 0.020 | |
| 0 to 0.3 |
| Lead (Pb), % | 0 to 0.070 | |
| 0 |
| Molybdenum (Mo), % | 0 | |
| 3.5 to 4.5 |
| Nickel (Ni), % | 0 to 0.010 | |
| 0 |
| Nitrogen (N), % | 0 | |
| 0 to 0.030 |
| Oxygen (O), % | 0 | |
| 0 to 0.12 |
| Palladium (Pd), % | 0 | |
| 0.040 to 0.080 |
| Silver (Ag), % | 2.3 to 2.7 | |
| 0 |
| Tin (Sn), % | 95 to 96.6 | |
| 0 |
| Titanium (Ti), % | 0 | |
| 71 to 77 |
| Vanadium (V), % | 0 | |
| 7.5 to 8.5 |
| Zinc (Zn), % | 0 to 0.0010 | |
| 0 |
| Zirconium (Zr), % | 0 | |
| 3.5 to 4.5 |
| Residuals, % | 0 | |
| 0 to 0.4 |