Precious Metal BAg-1
UNS P07450 · GB BAg45CuZnCd
BAg-1 is a 45 % silver, cadmium-bearing Ag–Cu–Zn–Cd brazing filler (UNS P07450, BAg45CuZnCd) with the lowest melting range of the common BAg alloys.
Reference datasheet — BAg-1 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
BAg-1 tempers and conditions
BAg-1 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 BAg-1 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
FLUX-COATED | Flux-Coated Rod | Supply form |
POWDER-PASTE | Atomized Powder / Braze Paste | Supply form |
STRIP-ANN | Annealed Strip / Preform | Supply form |
WIRE-HD | Bare Drawn Wire / Rod | Supply form |
What is BAg-1?
BAg-1 is a 45 % silver, cadmium-bearing Ag–Cu–Zn–Cd brazing filler (UNS P07450, BAg45CuZnCd) with the lowest melting range of the common BAg alloys. It is chosen for free capillary flow and tolerance of variable joint clearance on steels, stainless, copper alloys and carbide, and is supplied as drawn wire, rolled strip, flux-coated rod, stamped preforms, powder and paste. As-brazed joints give 414 MPa tensile, 200 MPa yield, 21 % elongation, 90 HB and 22 % IACS, with service limited to about 200 °C. Cadmium content bars it from RoHS, food-contact and medical work — substitute BAg-24, BAg-34 or BAg-36. BAg-1 has a density of 9.3 g/cm³ (0.336 lb/in³), lighter than 85% of precious metal grades. It melts at 607°C (1,125 °F). BAg-1 has a yield strength of 200 MPa (29 ksi) and a tensile strength of 414 MPa (60 ksi) — stronger than 51% of precious metal grades. Elongation at break is 21% and the elastic modulus is 83 GPa (12 Msi).
What is BAg-1 used for?
- HVAC/refrigeration copper joints
- carbide tool tip brazing
- electrical contact assembly
- general jobbing brazing
Advantages
- Low embodied carbon — 48 kg CO₂/kg, better than 92% of precious metal grades
Limitations
- Difficult to weld — 15/100, worse than 96% of precious metal grades
- Limited service temperature — 200°C (392 °F), worse than 89% of precious metal grades
- Needs corrosion protection — 65/100, worse than 77% of precious metal grades
- Hard to polish — 70/100, worse than 76% of precious metal grades
BAg-1 properties
Typical room-temperature values for BAg-1-AS-BRAZED; bars are the position among precious metal grades.
Physical3
BAg-1 has a density of 9.3 g/cm³ (0.336 lb/in³), lighter than 85% of precious metal grades. It melts at 607°C (1,125 °F).
Mechanical10
BAg-1 has a yield strength of 200 MPa (29 ksi) and a tensile strength of 414 MPa (60 ksi) — stronger than 51% of precious metal grades. Elongation at break is 21% and the elastic modulus is 83 GPa (12 Msi).
Thermal6
BAg-1 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-1 conducts electricity at 22 % IACS, better than 61% of precious metal grades.
Chemical & Environmental3
Corrosion resistance is good (65/100), worse than 77% of precious metal grades.
Sustainability4
Producing a kilogram of BAg-1 takes about 700 MJ of energy and emits 48 kg of CO₂ — less than 90% of precious metal grades. Typical recycled content is 40%.
Manufacturability7
BAg-1's machinability is fair (40/100, worse than 60% of precious metal grades); weldability poor (15/100); formability very good (75/100).
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-1 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with BAg-1
Is BAg-1 easy to machine?
Not a structural material — supplied as drawn wire, rolled strip or stamped preforms rather than machined; the alloy is soft and gummy if turned.
Can BAg-1 be welded?
Fusion welding is not applicable; the material is itself the joining filler, applied by torch, induction, resistance or furnace brazing at 620–760 °C with an AWS FB3-A (Type 3A) fluoride-boron flux.
Can BAg-1 be formed, bent or molded?
Excellent cold formability in the annealed state — readily drawn, rolled to foil and stamped into rings and washers; anneal between heavy reductions.
BAg-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 |
|---|---|---|
| AgAWS A5.8 / ASTM B260 | 44 – 46 | 45 |
| Cu | 14 – 16 | 15 |
| Znremainder after Ag/Cu/Cd | 14 – 18 | 16 |
| Cdtoxic — fume hazard, RoHS/REACH restricted | 23 – 25 | 24 |
| Other (total)total other elements, max | ≤ 0.15 |
What surface finishes work on BAg-1?
Joints can be polished or plated over; use forced local exhaust because cadmium oxide fume is highly toxic, and avoid the alloy where RoHS/food-contact/medical compliance is required (substitute BAg-24, BAg-34 or BAg-36).
Equivalent designations
Standards and trade names that resolve to Precious Metal BAg-1 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- P07450
- GB (China)
- BAg45CuZnCd
- Also called
- AWS BAg-1
How much does BAg-1 cost?
BAg-1 is a high-cost precious metal ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
BAg-1 — frequently asked
What is BAg-1 used for?
BAg-1 is typically used for HVAC/refrigeration copper joints, carbide tool tip brazing, electrical contact assembly and general jobbing brazing. In short: lowest-melting common BAg; best gap-filling flow; cadmium-bearing, not RoHS.
What is the yield strength of BAg-1?
BAg-1 has a typical yield strength of 200 MPa (29 ksi) and a tensile strength of 414 MPa (60 ksi) — stronger than 51% of precious metal grades.
Is BAg-1 easy to machine?
Not especially — machinability is rated fair (40/100, worse than 60% of precious metal grades). Not a structural material — supplied as drawn wire, rolled strip or stamped preforms rather than machined; the alloy is soft and gummy if turned.
Can BAg-1 be welded?
Not readily — weldability is rated poor (15/100). Fusion welding is not applicable; the material is itself the joining filler, applied by torch, induction, resistance or furnace brazing at 620–760 °C with an AWS FB3-A (Type 3A) fluoride-boron flux.
What surface finishes work on BAg-1?
Joints can be polished or plated over; use forced local exhaust because cadmium oxide fume is highly toxic, and avoid the alloy where RoHS/food-contact/medical compliance is required (substitute BAg-24, BAg-34 or BAg-36).
Can BAg-1 be formed, bent or molded?
Excellent cold formability in the annealed state — readily drawn, rolled to foil and stamped into rings and washers; anneal between heavy reductions.
What is the maximum service temperature of BAg-1?
BAg-1 is rated for continuous use to about 200°C (392 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does BAg-1 cost?
BAg-1 is a high-cost precious metal ($$$$), 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)
- ASTM B260 — Standard Specification for Brazing Filler Metal — ASTM International (2020)
- GB/T 10046 (2018)
- ASM Handbook Vol. 6 — Welding, Brazing, and Soldering — ASM International (1993)
- Easy-Flo 45 / Handy One BAg-1 filler metal data — Lucas-Milhaupt (Handy & Harman) (2021)
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.