AWS BAg-23 (P07850) Filler Metal
AWS BAg-23 is a silver-based filler metal for brazing. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. BAg-23 is the AWS designation for this material. P07850 is the UNS number.
It has a very high melting temperature among silver-based braze fillers. In addition, it has a moderately high density and a fairly low heat capacity.
The graph bars on the material properties cards below compare AWS BAg-23 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.
Thermal Properties
Brazing Temperature
750 to 1040 °C 1380 to 1900 °F
Latent Heat of Fusion
130 J/g
Melting Completion (Liquidus)
970 °C 1780 °F
Melting Onset (Solidus)
960 °C 1760 °F
Specific Heat Capacity
270 J/kg-K 0.065 BTU/lb-°F
Thermal Expansion
20 µm/m-K
Other Material Properties
Density
10 g/cm3 620 lb/ft3
Elastic (Young's, Tensile) Modulus
90 GPa 13 x 106 psi
Poisson's Ratio
0.36
Shear Modulus
33 GPa 4.8 x 106 psi
Tensile Strength: Ultimate (UTS)
170 MPa 25 x 103 psi
Common Calculations
Stiffness to Weight: Axial
5.0 points
Stiffness to Weight: Bending
15 points
Strength to Weight: Axial
4.7 points
Strength to Weight: Bending
6.8 points
Thermal Shock Resistance
6.8 points
Alloy Composition
| Ag | 84 to 86 | |
| Mn | 13.9 to 16 | |
| 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