ASTM B685 Alloy vs. Solder Alloy 121
Both ASTM B685 alloy and solder alloy 121 are otherwise unclassified metals. There are 17 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.
For each property being compared, the top bar is ASTM B685 alloy and the bottom bar is solder alloy 121.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 120 | |
| 21 |
| Poisson's Ratio | 0.37 | |
| 0.43 |
| Shear Modulus, GPa | 43 | |
| 7.5 |
| Tensile Strength: Ultimate (UTS), MPa | 660 to 1060 | |
| 32 |
Thermal Properties
| Latent Heat of Fusion, J/g | 180 | |
| 29 |
| Melting Completion (Liquidus), °C | 1230 | |
| 290 |
| Melting Onset (Solidus), °C | 1200 | |
| 230 |
| Specific Heat Capacity, J/kg-K | 300 | |
| 140 |
| Thermal Expansion, µm/m-K | 14 | |
| 28 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 5.0 | |
| 8.8 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 4.1 | |
| 7.4 |
Otherwise Unclassified Properties
| Density, g/cm3 | 11 | |
| 11 |
Common Calculations
| Stiffness to Weight: Axial, points | 6.1 | |
| 1.1 |
| Stiffness to Weight: Bending, points | 15 | |
| 8.6 |
| Strength to Weight: Axial, points | 17 to 27 | |
| 0.84 |
| Strength to Weight: Bending, points | 16 to 21 | |
| 2.1 |
| Thermal Shock Resistance, points | 28 to 46 | |
| 3.9 |
Alloy Composition
| Aluminum (Al), % | 0 to 0.0050 | |
| 0 to 0.0010 |
| Antimony (Sb), % | 0 | |
| 0 to 0.5 |
| Arsenic (As), % | 0 | |
| 0 to 0.030 |
| Bismuth (Bi), % | 0 | |
| 0 to 0.25 |
| Cadmium (Cd), % | 0 to 0.050 | |
| 0 to 0.0050 |
| Copper (Cu), % | 39.5 to 40.5 | |
| 0 to 0.080 |
| Gold (Au), % | 0 | |
| 0 to 0.050 |
| Indium (In), % | 0 | |
| 0 to 0.1 |
| Iron (Fe), % | 0 to 0.050 | |
| 0 to 0.020 |
| Lead (Pb), % | 0 to 0.030 | |
| 83.4 to 85.5 |
| Nickel (Ni), % | 0 | |
| 0 to 0.010 |
| Palladium (Pd), % | 59 to 60.5 | |
| 0 |
| Silver (Ag), % | 0 to 0.1 | |
| 0 to 0.1 |
| Tin (Sn), % | 0 | |
| 14.5 to 15.5 |
| Zinc (Zn), % | 0 to 0.060 | |
| 0 to 0.0010 |
| Residuals, % | 0 to 0.2 | |
| 0 |