AWS BVAu-7 (P00507) Vacuum Service Filler Metal
AWS BVAu-7 is a gold-based filler metal for brazing. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. BVAu-7 is the AWS designation for this material. P00507 is the UNS number.
It has a moderately high melting temperature among the gold-based braze fillers in the database.
The graph bars on the material properties cards below compare AWS BVAu-7 to: gold-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
1120 to 1150 °C 2050 to 2110 °F
Latent Heat of Fusion
140 J/g
Melting Completion (Liquidus)
1120 °C 2050 °F
Melting Onset (Solidus)
1100 °C 2020 °F
Specific Heat Capacity
240 J/kg-K 0.056 BTU/lb-°F
Thermal Expansion
13 µm/m-K
Other Material Properties
Density
15 g/cm3 930 lb/ft3
Elastic (Young's, Tensile) Modulus
130 GPa 18 x 106 psi
Poisson's Ratio
0.38
Shear Modulus
45 GPa 6.6 x 106 psi
Tensile Strength: Ultimate (UTS)
200 MPa 29 x 103 psi
Common Calculations
Stiffness to Weight: Axial
4.7 points
Stiffness to Weight: Bending
11 points
Strength to Weight: Axial
3.7 points
Strength to Weight: Bending
5.1 points
Thermal Shock Resistance
8.9 points
Alloy Composition
| Au | 49.5 to 50.5 | |
| Ni | 24.5 to 25.5 | |
| Pd | 23.9 to 26 | |
| Co | 0 to 0.060 | |
| 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
Further Reading
AWS A5.8: Specification for Filler Metals for Brazing and Braze Welding