Precious Metal BAg15CuZnSn
GB GB/T 10046 BAg15CuZnSn
BAg15CuZnSn is a cadmium-free Ag-Cu-Zn-Sn braze filler to GB/T 10046 with roughly 15 % silver, the tin addition keeping the melting range usable at that low silver level.
Reference datasheet — BAg15CuZnSn 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.
BAg15CuZnSn tempers and conditions
BAg15CuZnSn is supplied in one standard condition, AS-BRAZED.
Supply forms, finishes and certifications
Ways BAg15CuZnSn is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
FCR | Flux-coated rod | Supply form |
RING | Preform ring / washer | Supply form |
ROD-BAREDefault | Bare rod | Supply form |
STRIP | Strip / foil | Supply form |
Wire-Ann | Annealed wire | Supply form |
PASTE | Braze paste | Printing process |
What is BAg15CuZnSn?
BAg15CuZnSn is a cadmium-free Ag-Cu-Zn-Sn braze filler to GB/T 10046 with roughly 15 % silver, the tin addition keeping the melting range usable at that low silver level. It is chosen for cost-sensitive copper, brass and bronze joints and is stocked as bare rod, annealed wire, strip, stamped rings, flux-cored rod and paste; as-brazed metal runs about 420 MPa tensile at 18 % elongation. Low silver means a wide melting range, sluggish capillary flow and poor filling of narrow gaps, and zinc loss rules it out of vacuum brazing. Where better flow or stainless-steel wetting is needed, step up to a 45 % silver grade such as ПСр45 or an AWS BAg-1 type. BAg15CuZnSn has a density of 8.4 g/cm³ (0.303 lb/in³), lighter than 99% of precious metal grades. It melts at 640°C (1,184 °F). BAg15CuZnSn 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 22% and the elastic modulus is 95 GPa (13.8 Msi).
What is BAg15CuZnSn used for?
- refrigeration copper tube brazing
- electrical connector brazing
- general HVAC repair
Advantages
- Lightweight — 8.4 g/cm³ (0.303 lb/in³), better than 99% of precious metal grades
- Low embodied carbon — 20 kg CO₂/kg, better than 99% of precious metal grades
- Easy to machine — 60/100, better than 97% of precious metal grades
Limitations
- Needs corrosion protection — 48/100, worse than 99% of precious metal grades
- Difficult to weld — 10/100, worse than 99% of precious metal grades
- Limited service temperature — 200°C (392 °F), worse than 89% of precious metal grades
- Limited formability — 65/100, worse than 86% of precious metal grades
- Hard to polish — 70/100, worse than 76% of precious metal grades
BAg15CuZnSn properties
Typical room-temperature values; bars are the position among precious metal grades.
Physical3
BAg15CuZnSn has a density of 8.4 g/cm³ (0.303 lb/in³), lighter than 99% of precious metal grades. It melts at 640°C (1,184 °F).
Mechanical10
BAg15CuZnSn 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 22% and the elastic modulus is 95 GPa (13.8 Msi).
Thermal6
BAg15CuZnSn is rated for continuous service to 200°C (392 °F). It conducts heat at 80 W/m·K (46.2 BTU/hr·ft·°F), worse than 54% of precious metal grades. Thermal expansion is 18.5 µm/m·K (10.3 µin/in·°F).
Electrical3
BAg15CuZnSn conducts electricity at 20 % IACS, better than 53% of precious metal grades.
Chemical & Environmental3
Corrosion resistance is fair (48/100), worse than 99% of precious metal grades.
Sustainability4
Producing a kilogram of BAg15CuZnSn takes about 280 MJ of energy and emits 20 kg of CO₂ — less than 99% of precious metal grades. Typical recycled content is 35%.
Manufacturability6
BAg15CuZnSn's machinability is good (60/100, better than 97% of precious metal grades); weldability not recommended (10/100); formability good (65/100).
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. BAg15CuZnSn is highlighted; hover a dot for its name, or open the interactive family chart.
Working with BAg15CuZnSn
Is BAg15CuZnSn easy to machine?
Rarely machined; if preforms must be turned, run low speed with sharp high-positive-rake tools because the alloy smears and drags. Collect all chips and swarf for silver reclamation, since scrap is credited by weight.
Can BAg15CuZnSn be welded?
This is a braze filler, not a fusion welding consumable. When brazing, avoid overheating: excess heat volatilizes zinc and promotes Ag-Cu eutectic segregation, leaving a porous, weak fillet.
Can BAg15CuZnSn be formed, bent or molded?
Continuously cast stock draws to wire and rolls to strip, but work hardening is pronounced; interanneal at 550–600 °C and cool quickly before further reduction.
BAg15CuZnSn 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 |
|---|---|---|
| Agnominal silver content 15% | 14 – 16 | 15 |
| Cu | 41 – 45 | 43 |
| Snlowers liquidus, improves flow, replaces Cd | 2 – 3 | 2.5 |
| Cdcadmium-free grade, Cd controlled as impurity | ≤ 0.01 | — |
| Pbimpurity | ≤ 0.03 | — |
| GB/T 10046 total impurity limit | ≤ 0.15 | — |
| Zn | balance | — |
What surface finishes work on BAg15CuZnSn?
Borax-type flux residue must be removed completely with a hot water or dilute acid wash, otherwise the hygroscopic residue absorbs moisture and corrodes the joint. Fillets can be polished, or nickel/tin plated to mask the color difference against copper and brass.
Equivalent designations
Standards and trade names that resolve to Precious Metal BAg15CuZnSn in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- GB (China)
- GB/T 10046 BAg15CuZnSn
How much does BAg15CuZnSn cost?
BAg15CuZnSn 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.
BAg15CuZnSn — frequently asked
What is BAg15CuZnSn used for?
BAg15CuZnSn is typically used for refrigeration copper tube brazing, electrical connector brazing and general HVAC repair. In short: economy 15 % silver braze; cadmium-free copper brazing; tin-modified melting range.
What is the yield strength of BAg15CuZnSn?
BAg15CuZnSn 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 BAg15CuZnSn easy to machine?
Reasonably — machinability is rated good (60/100, better than 97% of precious metal grades). Rarely machined; if preforms must be turned, run low speed with sharp high-positive-rake tools because the alloy smears and drags. Collect all chips and swarf for silver reclamation, since scrap is credited by weight.
Can BAg15CuZnSn be welded?
Not readily — weldability is rated not recommended (10/100). This is a braze filler, not a fusion welding consumable. When brazing, avoid overheating: excess heat volatilizes zinc and promotes Ag-Cu eutectic segregation, leaving a porous, weak fillet.
What surface finishes work on BAg15CuZnSn?
Borax-type flux residue must be removed completely with a hot water or dilute acid wash, otherwise the hygroscopic residue absorbs moisture and corrodes the joint. Fillets can be polished, or nickel/tin plated to mask the color difference against copper and brass.
Can BAg15CuZnSn be formed, bent or molded?
Continuously cast stock draws to wire and rolls to strip, but work hardening is pronounced; interanneal at 550–600 °C and cool quickly before further reduction.
What is the maximum service temperature of BAg15CuZnSn?
BAg15CuZnSn 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.
How much does BAg15CuZnSn cost?
BAg15CuZnSn 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
- GB/T 10046 (2018)
- AWS A5.8/A5.8M Specification for Filler Metals for Brazing and Braze Welding — AWS (2019)
- ASM Handbook Vol. 6 — Welding, Brazing and Soldering (Silver brazing filler metals) — ASM International (1993)
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.