AWS BAg-8a vs. AWS BAu-2
Both AWS BAg-8a and AWS BAu-2 are otherwise unclassified metals. Both are furnished in the as-fabricated (no temper or treatment) condition. They have a modest 20% of their average alloy composition in common, which, by itself, doesn't mean much.
For each property being compared, the top bar is AWS BAg-8a and the bottom bar is AWS BAu-2.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 83 | |
| 100 |
| Poisson's Ratio | 0.36 | |
| 0.4 |
| Shear Modulus, GPa | 31 | |
| 36 |
| Tensile Strength: Ultimate (UTS), MPa | 150 | |
| 150 |
Thermal Properties
| Brazing Temperature, °C | 720 to 870 | |
| 890 to 1010 |
| Latent Heat of Fusion, J/g | 140 | |
| 92 |
| Melting Completion (Liquidus), °C | 770 | |
| 890 |
| Melting Onset (Solidus), °C | 770 | |
| 890 |
| Specific Heat Capacity, J/kg-K | 290 | |
| 180 |
| Thermal Expansion, µm/m-K | 19 | |
| 15 |
Otherwise Unclassified Properties
| Density, g/cm3 | 10 | |
| 17 |
Common Calculations
| Stiffness to Weight: Axial, points | 4.6 | |
| 3.3 |
| Stiffness to Weight: Bending, points | 15 | |
| 9.1 |
| Strength to Weight: Axial, points | 4.2 | |
| 2.4 |
| Strength to Weight: Bending, points | 6.3 | |
| 3.6 |
| Thermal Shock Resistance, points | 6.7 | |
| 7.1 |
Alloy Composition
| Copper (Cu), % | 26.4 to 28.8 | |
| 19.4 to 20.5 |
| Gold (Au), % | 0 | |
| 79.5 to 80.5 |
| Lithium (Li), % | 0.25 to 0.5 | |
| 0 |
| Silver (Ag), % | 71 to 73 | |
| 0 |
| Residuals, % | 0 | |
| 0 to 0.15 |