Precious Metal AWS BVPd-1-ANN (Annealed)
Heat-treated state
UNS P03657
Softest supplied wire condition — pick for hand-fed face feeding and for forming rings/preforms.
Values for the ANN condition
Other AWS BVPd-1 tempers and conditions
AWS BVPd-1 is listed in 3 conditions; see the grade overview at AWS BVPd-1.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
ANNThis page Annealed | Softest supplied wire condition — pick for hand-fed face feeding and for forming rings/preforms. | 250 | 600 | 20 | 166 HB | 5 % IACS |
BRDefault As Brazed | Default condition: the solidified filler in a finished vacuum-brazed joint, brazing at 1240–1290 °C. | 380 | 620 | 15 | 190 HB | 5.5 % IACS |
Cold drawn | Stiff drawn wire for automatic wire feeders and self-supporting preform legs; lower ductility. | 900 | 1,000 | 3 | 30 HRC | 4.5 % IACS |
What is AWS BVPd-1-ANN?
AWS BVPd-1-ANN is AWS BVPd-1 heat treated to ANN — softest supplied wire condition — pick for hand-fed face feeding and for forming rings/preforms. AWS BVPd-1-ANN has a yield strength of 250 MPa (36.3 ksi) and a tensile strength of 600 MPa (87 ksi) — stronger than 81% of precious metal grades. Elongation at break is 20% and the elastic modulus is 150 GPa (21.8 Msi). AWS BVPd-1-ANN has a density of 10.6 g/cm³ (0.383 lb/in³), heavier than 57% of precious metal grades. It melts at 1,219°C (2,226 °F). BR is the default condition FabDigit quotes; ANN is available on request or by drawing note.
Advantages
- High service temperature — 800°C (1,472 °F), better than 90% of precious metal grades
- Stiff — 150 GPa (21.8 Msi), better than 87% of precious metal grades
- High strength — 250 MPa (36.3 ksi), better than 81% of precious metal grades
Limitations
- Poor heat conductor — 22 W/m·K (12.7 BTU/hr·ft·°F), worse than 98% of precious metal grades
- Low electrical conductivity — 5 % IACS, worse than 97% of precious metal grades
- Difficult to machine — 30/100, worse than 86% of precious metal grades
- Limited ductility — 20%, worse than 77% of precious metal grades
AWS BVPd-1-ANN properties
Typical room-temperature values for AWS BVPd-1-ANN; 19 are specific to this condition. Other listed values are AWS BVPd-1 reference data and may not represent this condition. Bars are the position among precious metal grades.
Physical3
AWS BVPd-1-ANN has a density of 10.6 g/cm³ (0.383 lb/in³), heavier than 57% of precious metal grades. It melts at 1,219°C (2,226 °F).
Mechanical12
AWS BVPd-1-ANN has a yield strength of 250 MPa (36.3 ksi) and a tensile strength of 600 MPa (87 ksi) — stronger than 81% of precious metal grades. Elongation at break is 20% and the elastic modulus is 150 GPa (21.8 Msi).
Thermal5
AWS BVPd-1-ANN is rated for continuous service to 800°C (1,472 °F). It conducts heat at 22 W/m·K (12.7 BTU/hr·ft·°F), worse than 98% of precious metal grades. Thermal expansion is 12.5 µm/m·K (6.94 µin/in·°F).
Electrical3
AWS BVPd-1-ANN conducts electricity at 5 % IACS, worse than 97% of precious metal grades.
Chemical & Environmental3
Corrosion resistance is very good (78/100), worse than 56% of precious metal grades.
Sustainability3
Producing a kilogram of AWS BVPd-1-ANN takes about 40,000 MJ of energy and emits 2,600 kg of CO₂ — more than 60% of precious metal grades. Typical recycled content is 40%.
Manufacturability2
AWS BVPd-1-ANN's machinability is poor (30/100, worse than 86% of precious metal grades).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with AWS BVPd-1-ANN
Is AWS BVPd-1 easy to machine?
Not a structural machining stock; supplied as wire, foil, preforms or powder — trim with shears/wire cutters and recover all scrap for refining.
Can AWS BVPd-1 be welded?
Used as a filler, not a base metal: braze in vacuum (<10⁻⁴ mbar) or dry hydrogen at 1240–1290 °C with clean, oxide-free, flux-free joints and short dwell to limit cobalt/nickel diffusion.
Can AWS BVPd-1 be formed, bent or molded?
Annealed wire and foil form readily into rings and shims; hard-drawn wire needs an intermediate anneal before tight bends.
What surface finishes work on AWS BVPd-1?
Joints come out bright from vacuum; no plating needed, and the noble Pd-rich fillet takes a good polish, though the cobalt fraction can darken slightly after long high-temperature air exposure.
AWS BVPd-1 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 |
|---|---|---|
| Pdpalladium base of the vacuum-grade filler | 64 – 66 | 65 |
| Other (total)AWS A5.8 vacuum-grade limit on residuals; Zn, Cd, P and other high-vapour-pressure elements are excluded | ≤ 0.15 | — |
| Co | balance | — |
AWS BVPd-1-ANN — frequently asked
What is AWS BVPd-1-ANN used for?
AWS BVPd-1-ANN is typically used for vacuum brazing of contact assemblies, hermetic relay fabrication and aerospace electrical connector brazing. In short: flux-free vacuum brazing filler; joints usable to 800 °C; filler metal, not stock.
What is the yield strength of AWS BVPd-1-ANN?
AWS BVPd-1-ANN has a typical yield strength of 250 MPa (36.3 ksi) and a tensile strength of 600 MPa (87 ksi) — stronger than 81% of precious metal grades. Strength varies by condition: see the 3 listed tempers.
Is AWS BVPd-1-ANN easy to machine?
Not especially — machinability is rated poor (30/100, worse than 86% of precious metal grades). Not a structural machining stock; supplied as wire, foil, preforms or powder — trim with shears/wire cutters and recover all scrap for refining.
Can AWS BVPd-1-ANN be welded?
Used as a filler, not a base metal: braze in vacuum (<10⁻⁴ mbar) or dry hydrogen at 1240–1290 °C with clean, oxide-free, flux-free joints and short dwell to limit cobalt/nickel diffusion.
What surface finishes work on AWS BVPd-1-ANN?
Joints come out bright from vacuum; no plating needed, and the noble Pd-rich fillet takes a good polish, though the cobalt fraction can darken slightly after long high-temperature air exposure.
Can AWS BVPd-1-ANN be formed, bent or molded?
Annealed wire and foil form readily into rings and shims; hard-drawn wire needs an intermediate anneal before tight bends.
What is the maximum service temperature of AWS BVPd-1-ANN?
AWS BVPd-1-ANN is rated for continuous use to about 800°C (1,472 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between AWS BVPd-1-BR and AWS BVPd-1-CD?
BR is the default condition — default condition: the solidified filler in a finished vacuum-brazed joint, brazing at 1240–1290 °C. CD: stiff drawn wire for automatic wire feeders and self-supporting preform legs; lower ductility. Yield strength is 380 MPa in BR versus 900 MPa in CD.
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 (palladium brazing filler metals) — ASM International (1993)
- Wesgo Metals Palco (65Pd-35Co) brazing alloy datasheet — Morgan Advanced Materials (2021)
- Pallabraze / palladium brazing alloy range — Johnson Matthey Metal Joining (2020)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.