AWS BAg-21 vs. AWS BAg-9
Both AWS BAg-21 and AWS BAg-9 are otherwise unclassified metals. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 83% of their average alloy composition in common.
For each property being compared, the top bar is AWS BAg-21 and the bottom bar is AWS BAg-9.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 85 | |
| 82 |
| Poisson's Ratio | 0.36 | |
| 0.35 |
| Shear Modulus, GPa | 31 | |
| 31 |
| Tensile Strength: Ultimate (UTS), MPa | 150 | |
| 140 |
Thermal Properties
| Brazing Temperature, °C | 700 to 900 | |
| 720 to 840 |
| Latent Heat of Fusion, J/g | 140 | |
| 130 |
| Melting Completion (Liquidus), °C | 800 | |
| 720 |
| Melting Onset (Solidus), °C | 690 | |
| 670 |
| Specific Heat Capacity, J/kg-K | 280 | |
| 290 |
| Thermal Expansion, µm/m-K | 19 | |
| 20 |
Otherwise Unclassified Properties
| Density, g/cm3 | 9.8 | |
| 9.6 |
| Embodied Energy, MJ/kg | 970 | |
| 980 |
Common Calculations
| Stiffness to Weight: Axial, points | 4.8 | |
| 4.8 |
| Stiffness to Weight: Bending, points | 15 | |
| 15 |
| Strength to Weight: Axial, points | 4.2 | |
| 4.1 |
| Strength to Weight: Bending, points | 6.4 | |
| 6.3 |
| Thermal Shock Resistance, points | 6.6 | |
| 6.0 |
Alloy Composition
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| Copper (Cu), % | 27.5 to 29.5 | |
| 19 to 21 |
| Nickel (Ni), % | 2.0 to 3.0 | |
| 0 |
| Silver (Ag), % | 62 to 64 | |
| 64 to 66 |
| Tin (Sn), % | 5.0 to 7.0 | |
| 0 |
| Zinc (Zn), % | 0 | |
| 13 to 17 |
| Residuals, % | 0 to 0.15 | |
| 0 to 0.15 |