Precious Metal BVAg-32
UNS P07547
BVAg-32 is a low-vapor-pressure silver–copper vacuum brazing filler (UNS P07547) that extends the BVAg series composition range toward higher brazing temperatures.
Reference datasheet — BVAg-32 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the AS-BRAZED condition
BVAg-32 tempers and conditions
BVAg-32 is supplied in one standard condition, AS-BRAZED. AS-BRAZED is the default FabDigit quotes; the values on this page are for it.
Supply forms, finishes and certifications
Ways BVAg-32 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
FOIL | Rolled foil / ribbon | Supply form |
Wire-Ann | Annealed wire / rod | Supply form |
PASTE | Braze paste | Printing process |
POWDER | Atomized powder | Printing process |
What is BVAg-32?
BVAg-32 is a low-vapor-pressure silver–copper vacuum brazing filler (UNS P07547) that extends the BVAg series composition range toward higher brazing temperatures. It is used for controlled-atmosphere and vacuum furnace brazing of aerospace and instrumentation assemblies, and is supplied as annealed wire, foil, powder and paste. As-brazed joints show about 400 MPa tensile strength, 230 MPa yield and 18% elongation, with service to roughly 500 °C. The 950–1040 °C braze cycle restricts it to base metals that tolerate that temperature; BVAg-31 brazes lower, at 870–925 °C. BVAg-32 has a density of 10.45 g/cm³ (0.378 lb/in³), heavier than 53% of precious metal grades. It melts at 901°C (1,654 °F). BVAg-32 has a yield strength of 230 MPa (33.4 ksi) and a tensile strength of 400 MPa (58 ksi) — stronger than 70% of precious metal grades. Elongation at break is 18% and the elastic modulus is 100 GPa (14.5 Msi).
What is BVAg-32 used for?
- Vacuum furnace brazing of aerospace assemblies
- Instrumentation and sensor sub-assemblies
- Stainless steel tube-to-fitting joints
- Superalloy engine hardware
- Vacuum feedthrough and housing joints
- Foil preforms for lap-joint brazing
Advantages
- High service temperature — 500°C (932 °F), better than 79% of precious metal grades
Limitations
- Low electrical conductivity — 9 % IACS, worse than 84% of precious metal grades
- Limited ductility — 18%, worse than 83% of precious metal grades
- Limited formability — 70/100, worse than 78% of precious metal grades
BVAg-32 properties
Typical room-temperature values for BVAg-32-AS-BRAZED; bars are the position among precious metal grades.
Physical3
BVAg-32 has a density of 10.45 g/cm³ (0.378 lb/in³), heavier than 53% of precious metal grades. It melts at 901°C (1,654 °F).
Mechanical9
BVAg-32 has a yield strength of 230 MPa (33.4 ksi) and a tensile strength of 400 MPa (58 ksi) — stronger than 70% of precious metal grades. Elongation at break is 18% and the elastic modulus is 100 GPa (14.5 Msi).
Thermal6
BVAg-32 is rated for continuous service to 500°C (932 °F). It conducts heat at 60 W/m·K (34.7 BTU/hr·ft·°F), worse than 72% of precious metal grades. Thermal expansion is 17.5 µm/m·K (9.72 µin/in·°F).
Electrical3
BVAg-32 conducts electricity at 9 % IACS, worse than 84% of precious metal grades.
Chemical & Environmental3
Corrosion resistance is very good (82/100), better than 53% of precious metal grades.
Sustainability3
Producing a kilogram of BVAg-32 takes about 11,000 MJ of energy and emits 900 kg of CO₂ — more than 58% of precious metal grades. Typical recycled content is 40%.
Manufacturability5
BVAg-32's formability very good (70/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the precious metal family
Yield strength against density for every precious metal grade FabDigit runs. BVAg-32 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with BVAg-32
Is BVAg-32 easy to machine?
Rarely machined; foil and preforms are stamped or sheared, and all scrap/swarf must be segregated for precious-metal recovery.
Can BVAg-32 be welded?
Not a structural weld filler — apply by vacuum or dry-hydrogen furnace brazing at 950–1040 °C with joint clearance 0.05–0.10 mm; flux is unnecessary and undesirable in vacuum.
Can BVAg-32 be formed, bent or molded?
Ductile and readily drawn to fine wire or rolled to 25 µm foil with intermediate anneals at 600–700 °C in protective atmosphere.
BVAg-32 chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| Agsilver | 53 – 55 | 54 |
| Pdpalladium raises melting range and high-temperature strength | 24 – 26 | 25 |
| Znvacuum-grade high-vapor-pressure element limit | ≤ 0 | |
| Cdvacuum-grade limit | ≤ 0 | |
| Pvacuum-grade limit | ≤ 0 | |
| Other elements, totalAWS A5.8 residual limit | ≤ 0.15 | |
| Cu | balance |
What surface finishes work on BVAg-32?
Braze fillets are self-bright after vacuum brazing; residues can be removed by light bead blasting or dilute acid pickling that does not attack the Cu-rich phase.
Equivalent designations
Standards and trade names that resolve to Precious Metal BVAg-32 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- P07547
How much does BVAg-32 cost?
BVAg-32 is a high-cost precious metal ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
BVAg-32 — frequently asked
What is BVAg-32 used for?
BVAg-32 is typically used for vacuum furnace brazing of aerospace assemblies, instrumentation and sensor sub-assemblies, stainless steel tube-to-fitting joints, superalloy engine hardware, vacuum feedthrough and housing joints and foil preforms for lap-joint brazing. In short: high-temperature BVAg grade; vacuum, flux-free brazing; tight-clearance joint filler.
What is the yield strength of BVAg-32?
BVAg-32 has a typical yield strength of 230 MPa (33.4 ksi) and a tensile strength of 400 MPa (58 ksi) — stronger than 70% of precious metal grades.
Is BVAg-32 easy to machine?
Rarely machined; foil and preforms are stamped or sheared, and all scrap/swarf must be segregated for precious-metal recovery.
Can BVAg-32 be welded?
Not a structural weld filler — apply by vacuum or dry-hydrogen furnace brazing at 950–1040 °C with joint clearance 0.05–0.10 mm; flux is unnecessary and undesirable in vacuum.
What surface finishes work on BVAg-32?
Braze fillets are self-bright after vacuum brazing; residues can be removed by light bead blasting or dilute acid pickling that does not attack the Cu-rich phase.
Can BVAg-32 be formed, bent or molded?
Ductile and readily drawn to fine wire or rolled to 25 µm foil with intermediate anneals at 600–700 °C in protective atmosphere.
What is the maximum service temperature of BVAg-32?
BVAg-32 is rated for continuous use to about 500°C (932 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does BVAg-32 cost?
BVAg-32 is a high-cost precious metal ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- AWS A5.8/A5.8M — Specification for Filler Metals for Brazing and Braze Welding — American Welding Society (2019)
- ASM Handbook Vol. 6 — Welding, Brazing, and Soldering (Silver and palladium braze filler metals) — ASM International (1993)
- Silver-palladium-copper vacuum braze alloy datasheets (Palcusil-type 54Ag-25Pd-21Cu) — Precious-metal braze producers (2023)
- UNS P07547 alloy designation, Metals & Alloys in the Unified Numbering System — SAE/ASTM (2017)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.