AWS BAg-7 vs. AWS BAg-20
Both AWS BAg-7 and AWS BAg-20 are otherwise unclassified metals. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 69% of their average alloy composition in common.
For each property being compared, the top bar is AWS BAg-7 and the bottom bar is AWS BAg-20.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 83 | |
| 93 |
| Poisson's Ratio | 0.34 | |
| 0.32 |
| Shear Modulus, GPa | 31 | |
| 35 |
| Tensile Strength: Ultimate (UTS), MPa | 150 | |
| 160 |
Thermal Properties
| Brazing Temperature, °C | 650 to 900 | |
| 770 to 900 |
| Latent Heat of Fusion, J/g | 130 | |
| 150 |
| Melting Completion (Liquidus), °C | 650 | |
| 770 |
| Melting Onset (Solidus), °C | 620 | |
| 680 |
| Specific Heat Capacity, J/kg-K | 290 | |
| 340 |
| Thermal Expansion, µm/m-K | 20 | |
| 21 |
Otherwise Unclassified Properties
| Density, g/cm3 | 9.3 | |
| 8.6 |
| Embodied Carbon, kg CO2/kg material | 55 | |
| 30 |
| Embodied Energy, MJ/kg | 860 | |
| 480 |
Common Calculations
| Stiffness to Weight: Axial, points | 4.9 | |
| 6.0 |
| Stiffness to Weight: Bending, points | 16 | |
| 17 |
| Strength to Weight: Axial, points | 4.5 | |
| 5.1 |
| Strength to Weight: Bending, points | 6.7 | |
| 7.6 |
| Thermal Shock Resistance, points | 6.4 | |
| 5.9 |
Alloy Composition
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| Copper (Cu), % | 21 to 23 | |
| 37 to 39 |
| Silver (Ag), % | 55 to 57 | |
| 29 to 31 |
| Tin (Sn), % | 4.5 to 5.5 | |
| 0 |
| Zinc (Zn), % | 15 to 19 | |
| 30 to 34 |
| Residuals, % | 0 to 0.15 | |
| 0 to 0.15 |