AWS BAg-28 vs. AWS BAg-20
Both AWS BAg-28 and AWS BAg-20 are otherwise unclassified metals. Both are furnished in the as-fabricated (no temper or treatment) condition. They have 88% of their average alloy composition in common.
For each property being compared, the top bar is AWS BAg-28 and the bottom bar is AWS BAg-20.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 88 | |
| 93 |
| Poisson's Ratio | 0.33 | |
| 0.32 |
| Shear Modulus, GPa | 33 | |
| 35 |
| Tensile Strength: Ultimate (UTS), MPa | 150 | |
| 160 |
Thermal Properties
| Brazing Temperature, °C | 680 to 840 | |
| 770 to 900 |
| Latent Heat of Fusion, J/g | 140 | |
| 150 |
| Melting Completion (Liquidus), °C | 710 | |
| 770 |
| Melting Onset (Solidus), °C | 650 | |
| 680 |
| Specific Heat Capacity, J/kg-K | 320 | |
| 340 |
| Thermal Expansion, µm/m-K | 21 | |
| 21 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.9 | |
| 8.6 |
| Embodied Carbon, kg CO2/kg material | 40 | |
| 30 |
| Embodied Energy, MJ/kg | 630 | |
| 480 |
Common Calculations
| Stiffness to Weight: Axial, points | 5.6 | |
| 6.0 |
| Stiffness to Weight: Bending, points | 17 | |
| 17 |
| Strength to Weight: Axial, points | 4.7 | |
| 5.1 |
| Strength to Weight: Bending, points | 7.1 | |
| 7.6 |
| Thermal Shock Resistance, points | 5.8 | |
| 5.9 |
Alloy Composition
| Copper (Cu), % | 29 to 31 | |
| 37 to 39 |
| Silver (Ag), % | 39 to 41 | |
| 29 to 31 |
| Tin (Sn), % | 1.5 to 2.5 | |
| 0 |
| Zinc (Zn), % | 26 to 30 | |
| 30 to 34 |
| Residuals, % | 0 | |
| 0 to 0.15 |