AWS BAg-7 (P07563) Filler Metal
AWS BAg-7 is a silver-based filler metal for brazing. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. BAg-7 is the AWS designation for this material. P07563 is the UNS number.
It has a moderately low tensile strength and a moderately low melting temperature among silver-based braze fillers.
The graph bars on the material properties cards below compare AWS BAg-7 to: silver-based braze fillers (top), all alloys in the same category (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.
Mechanical Properties
Elastic (Young's, Tensile) Modulus
83 GPa 12 x 106 psi
Poisson's Ratio
0.34
Shear Modulus
31 GPa 4.5 x 106 psi
Tensile Strength: Ultimate (UTS)
150 MPa 22 x 103 psi
Thermal Properties
Brazing Temperature
650 to 900 °C 1210 to 1650 °F
Latent Heat of Fusion
130 J/g
Melting Completion (Liquidus)
650 °C 1210 °F
Melting Onset (Solidus)
620 °C 1140 °F
Specific Heat Capacity
290 J/kg-K 0.070 BTU/lb-°F
Thermal Expansion
20 µm/m-K
Otherwise Unclassified Properties
Density
9.3 g/cm3 580 lb/ft3
Embodied Carbon
55 kg CO2/kg material
Embodied Energy
860 MJ/kg 370 x 103 BTU/lb
Common Calculations
Stiffness to Weight: Axial
4.9 points
Stiffness to Weight: Bending
16 points
Strength to Weight: Axial
4.5 points
Strength to Weight: Bending
6.7 points
Thermal Shock Resistance
6.4 points
Alloy Composition
| Ag | 55 to 57 | |
| Cu | 21 to 23 | |
| Zn | 15 to 19 | |
| Sn | 4.5 to 5.5 | |
| res. | 0 to 0.15 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
AWS A5.8: Specification for Filler Metals for Brazing and Braze Welding
CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015