AWS BVAg-6b (P07507) Vacuum Service Filler Metal
AWS BVAg-6b is a silver-based filler metal for brazing. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. BVAg-6b is the AWS designation for this material. P07507 is the UNS number.
It has a moderately high tensile strength and a moderately high melting temperature among silver-based braze fillers.
The graph bars on the material properties cards below compare AWS BVAg-6b 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
93 GPa 14 x 106 psi
Poisson's Ratio
0.35
Shear Modulus
35 GPa 5.0 x 106 psi
Tensile Strength: Ultimate (UTS)
180 MPa 26 x 103 psi
Thermal Properties
Brazing Temperature
870 to 980 °C 1600 to 1800 °F
Latent Heat of Fusion
160 J/g
Melting Completion (Liquidus)
870 °C 1600 °F
Melting Onset (Solidus)
780 °C 1430 °F
Specific Heat Capacity
310 J/kg-K 0.074 BTU/lb-°F
Thermal Expansion
19 µm/m-K
Otherwise Unclassified Properties
Density
9.7 g/cm3 610 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
5.3 points
Stiffness to Weight: Bending
16 points
Strength to Weight: Axial
5.1 points
Strength to Weight: Bending
7.3 points
Thermal Shock Resistance
7.4 points
Alloy Composition
| Ag | 49 to 51 | |
| Cu | 49 to 51 | |
| C | 0 to 0.0050 | |
| P | 0 to 0.0020 | |
| Pb | 0 to 0.0020 | |
| Zn | 0 to 0.0010 | |
| Cd | 0 to 0.0010 |
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