Precious Metal BAg-9
UNS P07650 · GB BAg65CuZn
BAg-9 (UNS P07650, BAg65CuZn) is a cadmium-free 65% silver Ag-Cu-Zn brazing filler selected where color match to sterling and corrosion resistance are important.
Reference datasheet — BAg-9 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 ANN condition
BAg-9 tempers and conditions
BAg-9 is supplied in 3 conditions, soft to hard. ANN is the default FabDigit quotes; the values on this page are for it.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
As built (as printed) | Properties of the solidified fillet/joint after brazing at 718–843 °C — use for joint design allowables rather than wire data. | 150 | 340 | 25 | 80 HB | 22 % IACS |
ANNDefault Annealed | Standard stock condition for BAg-9 wire, rod, strip and preforms — soft and ductile for coiling, cutting and preform stamping. | 170 | 380 | 32 | 85 HB | 22 % IACS |
Cold drawn / hard temper wire and strip | Pick for spring-back rings, self-supporting preforms and automatic feeding where stiffer wire is needed; anneals out on heating to brazing temperature. | 520 | 620 | 4 | 155 HB | 21 % IACS |
What is BAg-9?
BAg-9 (UNS P07650, BAg65CuZn) is a cadmium-free 65% silver Ag-Cu-Zn brazing filler selected where color match to sterling and corrosion resistance are important. Typical values are 380 MPa tensile, 170 MPa yield, 32% elongation, 85 HB and 22% IACS, and it is supplied annealed, hard or as-brazed in wire, strip and stamped preform form. Brazing is by torch, induction, furnace or resistance at 718-843 °C. The high silver content makes it the most expensive of the Cu-Zn-bearing grades, and the zinc excludes vacuum brazing, where BAg-8a applies. BAg-9 has a density of 9.8 g/cm³ (0.354 lb/in³), lighter than 75% of precious metal grades. It melts at 671°C (1,240 °F). BAg-9 has a yield strength of 170 MPa (24.7 ksi) and a tensile strength of 380 MPa (55.1 ksi) — weaker than 64% of precious metal grades. Elongation at break is 32% and the elastic modulus is 85 GPa (12.3 Msi).
What is BAg-9 used for?
- jewelry and flatware brazing
- food service equipment
- decorative metalwork
Advantages
- Low embodied carbon — 70 kg CO₂/kg, better than 76% of precious metal grades
- Ductile — tolerates forming and impact — 32%, better than 75% of precious metal grades
Limitations
- Limited service temperature — 200°C (392 °F), worse than 89% of precious metal grades
BAg-9 properties
Typical room-temperature values for BAg-9-ANN; bars are the position among precious metal grades.
Physical3
BAg-9 has a density of 9.8 g/cm³ (0.354 lb/in³), lighter than 75% of precious metal grades. It melts at 671°C (1,240 °F).
Mechanical13
BAg-9 has a yield strength of 170 MPa (24.7 ksi) and a tensile strength of 380 MPa (55.1 ksi) — weaker than 64% of precious metal grades. Elongation at break is 32% and the elastic modulus is 85 GPa (12.3 Msi).
Thermal6
BAg-9 is rated for continuous service to 200°C (392 °F). It conducts heat at 100 W/m·K (57.8 BTU/hr·ft·°F), better than 55% of precious metal grades. Thermal expansion is 19 µm/m·K (10.6 µin/in·°F).
Electrical3
BAg-9 conducts electricity at 22 % IACS, better than 61% of precious metal grades.
Chemical & Environmental3
Corrosion resistance is very good (82/100), better than 53% of precious metal grades.
Sustainability4
Producing a kilogram of BAg-9 takes about 1,100 MJ of energy and emits 70 kg of CO₂ — less than 71% of precious metal grades. Typical recycled content is 60%.
Manufacturability8
BAg-9's machinability is fair (40/100, worse than 60% of precious metal grades); weldability poor (30/100); formability excellent (88/100).
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. BAg-9 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with BAg-9
Is BAg-9 easy to machine?
Rarely machined — gummy and smearing; use sharp, high-rake tools, light feeds and collect all chips for silver recovery.
Can BAg-9 be welded?
Not a structural weld metal; join with torch, induction, furnace or resistance brazing at 718–843 °C with a fast heat-up to limit zinc loss.
Can BAg-9 be formed, bent or molded?
Annealed material draws to fine wire and rolls to thin strip easily; stamped ring/washer preforms are standard, interanneal after heavy reductions.
BAg-9 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 |
|---|---|---|
| AgAWS A5.8 / UNS P07650 | 64 – 66 | 65 |
| Cu | 19 – 21 | 20 |
| Cdcadmium-free classification limit | ≤ 0.01 | |
| Other (total)total of all other elements | ≤ 0.15 | |
| Zn | ≥ 13 (balance) |
What surface finishes work on BAg-9?
Bright, near-sterling-white fillets polish and buff readily; pickle off flux residues immediately, and expect gradual sulfide tarnish in industrial air.
Equivalent designations
Standards and trade names that resolve to Precious Metal BAg-9 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- P07650
- GB (China)
- BAg65CuZn
How much does BAg-9 cost?
BAg-9 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.
BAg-9 — frequently asked
What is BAg-9 used for?
BAg-9 is typically used for jewelry and flatware brazing, food service equipment and decorative metalwork. In short: 65% silver, cadmium-free; near-sterling color match; highly formable filler.
What is the yield strength of BAg-9?
BAg-9 has a typical yield strength of 170 MPa (24.7 ksi) and a tensile strength of 380 MPa (55.1 ksi) — weaker than 64% of precious metal grades. Strength varies by condition: see the 3 listed tempers.
Is BAg-9 easy to machine?
Not especially — machinability is rated fair (40/100, worse than 60% of precious metal grades). Rarely machined — gummy and smearing; use sharp, high-rake tools, light feeds and collect all chips for silver recovery.
Can BAg-9 be welded?
Not readily — weldability is rated poor (30/100). Not a structural weld metal; join with torch, induction, furnace or resistance brazing at 718–843 °C with a fast heat-up to limit zinc loss.
What surface finishes work on BAg-9?
Bright, near-sterling-white fillets polish and buff readily; pickle off flux residues immediately, and expect gradual sulfide tarnish in industrial air.
Can BAg-9 be formed, bent or molded?
Annealed material draws to fine wire and rolls to thin strip easily; stamped ring/washer preforms are standard, interanneal after heavy reductions.
What is the maximum service temperature of BAg-9?
BAg-9 is rated for continuous use to about 200°C (392 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between BAg-9-ANN and BAg-9 Hard?
ANN is the default condition — standard stock condition for BAg-9 wire, rod, strip and preforms — soft and ductile for coiling, cutting and preform stamping. Hard: pick for spring-back rings, self-supporting preforms and automatic feeding where stiffer wire is needed; anneals out on heating to brazing temperature. Yield strength is 170 MPa in ANN versus 520 MPa in Hard.
How much does BAg-9 cost?
BAg-9 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 — AWS (2019)
- GB/T 10046 (2018)
- ASM Handbook Vol. 6 — Welding, Brazing and Soldering — ASM International (1993)
- Silver brazing filler metal datasheets (BAg series) — Lucas-Milhaupt / Handy & Harman (2023)
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.