AWS BAg-20 vs. AWS BAg-18
Both AWS BAg-20 and AWS BAg-18 are otherwise unclassified metals. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 60% of their average alloy composition in common.
For each property being compared, the top bar is AWS BAg-20 and the bottom bar is AWS BAg-18.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 93 | |
| 82 |
| Poisson's Ratio | 0.32 | |
| 0.36 |
| Shear Modulus, GPa | 35 | |
| 30 |
| Tensile Strength: Ultimate (UTS), MPa | 160 | |
| 170 |
Thermal Properties
| Brazing Temperature, °C | 770 to 900 | |
| 720 to 980 |
| Latent Heat of Fusion, J/g | 150 | |
| 130 |
| Melting Completion (Liquidus), °C | 770 | |
| 720 |
| Melting Onset (Solidus), °C | 680 | |
| 600 |
| Specific Heat Capacity, J/kg-K | 340 | |
| 280 |
| Thermal Expansion, µm/m-K | 21 | |
| 19 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.6 | |
| 9.7 |
| Embodied Carbon, kg CO2/kg material | 30 | |
| 59 |
| Embodied Energy, MJ/kg | 480 | |
| 930 |
Common Calculations
| Stiffness to Weight: Axial, points | 6.0 | |
| 4.7 |
| Stiffness to Weight: Bending, points | 17 | |
| 15 |
| Strength to Weight: Axial, points | 5.1 | |
| 4.9 |
| Strength to Weight: Bending, points | 7.6 | |
| 7.0 |
| Thermal Shock Resistance, points | 5.9 | |
| 7.7 |
Alloy Composition
| Copper (Cu), % | 37 to 39 | |
| 28.4 to 31.5 |
| Silver (Ag), % | 29 to 31 | |
| 59 to 61 |
| Tin (Sn), % | 0 | |
| 9.5 to 10.5 |
| Zinc (Zn), % | 30 to 34 | |
| 0 |
| Residuals, % | 0 | |
| 0 to 0.15 |