AWS BAg-3 (P07501) Filler Metal
AWS BAg-3 is a silver-based filler metal for brazing. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. BAg-3 is the AWS designation for this material. P07501 is the UNS number.
It has a moderately low melting temperature among the silver-based braze fillers in the database.
The graph bars on the material properties cards below compare AWS BAg-3 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
80 GPa 12 x 106 psi
Poisson's Ratio
0.33
Shear Modulus
30 GPa 4.4 x 106 psi
Tensile Strength: Ultimate (UTS)
170 MPa 25 x 103 psi
Thermal Properties
Brazing Temperature
690 to 900 °C 1270 to 1650 °F
Latent Heat of Fusion
120 J/g
Melting Completion (Liquidus)
690 °C 1270 °F
Melting Onset (Solidus)
630 °C 1170 °F
Specific Heat Capacity
290 J/kg-K 0.069 BTU/lb-°F
Thermal Expansion
22 µm/m-K
Otherwise Unclassified Properties
Density
9.3 g/cm3 580 lb/ft3
Embodied Carbon
49 kg CO2/kg material
Embodied Energy
770 MJ/kg 330 x 103 BTU/lb
Common Calculations
Stiffness to Weight: Axial
4.8 points
Stiffness to Weight: Bending
15 points
Strength to Weight: Axial
5.1 points
Strength to Weight: Bending
7.3 points
Thermal Shock Resistance
6.9 points
Alloy Composition
| Ag | 49 to 51 | |
| Cd | 15 to 17 | |
| Zn | 13.5 to 17.5 | |
| Cu | 14.5 to 16.5 | |
| Ni | 2.5 to 3.5 | |
| 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