Precious Metal
Precious Metal BAg-2
Properties, tempers, machining, finishes and uses — values shown for the WIRE condition.
BAg-2 is a 35 % silver cadmium-bearing Ag–Cu–Zn–Cd brazing filler (UNS P07350, BAg35CuZnCd) with a broad melting range that suits both gap-filling and free-flowing capillary joints.
Reference datasheet — BAg-2 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.
What is BAg-2?
BAg-2 is a 35 % silver cadmium-bearing Ag–Cu–Zn–Cd brazing filler (UNS P07350, BAg35CuZnCd) with a broad melting range that suits both gap-filling and free-flowing capillary joints. It is the general-purpose workhorse of the cadmium BAg group, supplied as wire, rod, flux-coated rod, strip, foil, preforms, powder and paste. As-brazed joints reach 430 MPa tensile with 28 % elongation, and the alloy has a formability score of 90 for preform production. Lower silver content makes it cheaper than BAg-1a, but the wide melting range needs careful heating control and the cadmium excludes RoHS, potable-water and food-contact use. BAg-2 has a density of 9.4 g/cm³ (0.34 lb/in³), lighter than 82% of precious metal grades. It melts at 607°C (1,125 °F). BAg-2 has a yield strength of 200 MPa (29 ksi) and a tensile strength of 430 MPa (62.4 ksi) — stronger than 50% of precious metal grades. Elongation at break is 28% and the elastic modulus is 83 GPa (12 Msi).
What is BAg-2 used for?
- general fabrication brazing
- steel and copper alloy joints
- tool and die brazing
- plumbing fittings
Advantages
- Easy to machine — 55/100, better than 86% of precious metal grades
- Low embodied carbon — 55 kg CO₂/kg, better than 86% of precious metal grades
Limitations
- Limited service temperature — 200°C (392 °F), worse than 89% of precious metal grades
- Needs corrosion protection — 58/100, worse than 89% of precious metal grades
- Hard to polish — 70/100, worse than 77% of precious metal grades
BAg-2 properties
Typical room-temperature values for BAg-2-WIRE (default stock form for automated feeding, hand-fed torch brazing and for cutting into rings; annealed for easy forming), compiled from standards, handbooks and producer data. Each bar shows where the value sits among the precious metal grades in FabDigit's library — further right is higher. Other conditions have their own pages: see tempers.
Physical3
BAg-2 has a density of 9.4 g/cm³ (0.34 lb/in³), lighter than 82% of precious metal grades. It melts at 607°C (1,125 °F).
Mechanical9
BAg-2 has a yield strength of 200 MPa (29 ksi) and a tensile strength of 430 MPa (62.4 ksi) — stronger than 50% of precious metal grades. Elongation at break is 28% and the elastic modulus is 83 GPa (12 Msi).
Thermal5
BAg-2 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 19.5 µm/m·K (10.8 µin/in·°F).
Electrical3
BAg-2 conducts electricity at 21 % IACS, better than 56% of precious metal grades.
Chemical & Environmental3
Corrosion resistance is good (58/100), worse than 89% of precious metal grades.
Sustainability3
Producing a kilogram of BAg-2 takes about 620 MJ of energy and emits 55 kg of CO₂ — less than 91% of precious metal grades. Typical recycled content is 45%.
Manufacturability5
BAg-2's machinability is good (55/100, better than 86% of precious metal grades); formability excellent (90/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
BAg-2 tempers and conditions
BAg-2 is supplied in 9 conditions, each with its own property set. Open one for its full datasheet. WIRE is what FabDigit quotes unless the drawing says otherwise.
8 further conditions are listed below with a summary only.
| Condition | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
WIREDefault bare drawn wire, annealed | Default stock form for automated feeding, hand-fed torch brazing and for cutting into rings; annealed for easy forming. | — | 430 | 28 | 90 HV | — |
straight bare lengths (typ. 1.5–3.0 mm × 500 mm) | Pick for manual torch brazing where a stiff, hand-held filler is preferred over coil wire. | — | 430 | 26 | 92 HV | — |
rod with white/black brazing flux coating | Choose for field/torch work on steel, stainless and copper where separate flux application is inconvenient. | — | 430 | 26 | — | — |
rolled flat stock | For stamping preforms, shim-type placement between mating faces and reel-fed automatic brazing. | — | 440 | 24 | 95 HV | — |
thin rolled sheet (typ. 0.05–0.20 mm) | Use for furnace/vacuum-style sandwich joints where an exact, pre-placed filler volume is needed. | — | 450 | 20 | — | — |
stamped rings, washers, discs and shaped blanks | Best for high-volume induction or furnace brazing with repeatable filler metering and no operator variation. | — | 430 | 25 | — | — |
atomised, for paste blending and screen printing | Feedstock for paste manufacture and dispensed/printed filler placement on complex geometry. | — | — | — | — | — |
powder + flux + binder in syringe or cartridge | Choose for robotic dispensing, small parts and automated assembly lines needing filler and flux in one step. | — | — | — | — | — |
solidified fillet in a lap/capillary joint | Reference condition for joint design: strength governed by overlap area, not by the bulk filler properties. | — | — | — | 95 HV | — |
Working with BAg-2
Is BAg-2 easy to machine?
Soft and gummy — machine only for preform trimming with sharp, high-rake tools; avoid generating fine dust because of cadmium toxicity.
Can BAg-2 be welded?
Not a structural weld filler; it is applied by brazing. Use an AWS FB3-A white flux or an inert/reducing furnace atmosphere, and do not braze in vacuum furnaces because of cadmium volatilisation.
Can BAg-2 be formed, bent or molded?
Excellent cold formability — readily drawn to fine wire, rolled to 0.05 mm foil and stamped into rings and preforms.
Strength versus weight in the precious metal family
Yield strength against density for every precious metal grade FabDigit runs. BAg-2 is highlighted; hover a dot for its name, or open the interactive family chart.
BAg-2 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 BAg-2 / UNS P07350 | 34 – 36 | 35 |
| Cu | 25 – 27 | 26 |
| Cdtoxic — fume hazard, RoHS restricted | 17 – 19 | 18 |
| Other (total)total of all other elements | ≤ 0.15 | — |
| Znremainder, nominally 19–23% | balance | — |
What surface finishes work on BAg-2?
Fillets can be polished bright; remove corrosive flux residue with hot water/acid pickle; brazed assemblies can be plated if the Zn/Cd surface is properly cleaned.
Equivalent designations
Standards and trade names that resolve to Precious Metal BAg-2 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- P07350
- GB (China)
- BAg35CuZnCd
- Also called
- AWS BAg-2
How much does BAg-2 cost?
BAg-2 is a high-cost precious metal ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
BAg-2 — frequently asked
What is BAg-2 used for?
BAg-2 is typically used for general fabrication brazing, steel and copper alloy joints, tool and die brazing and plumbing fittings. In short: widest melting range BAg; economical 35 % silver; good gap-filling ability.
What is the yield strength of BAg-2?
BAg-2 has a typical yield strength of 200 MPa (29 ksi) and a tensile strength of 430 MPa (62.4 ksi) — stronger than 50% of precious metal grades. Strength varies by condition: see the 9 listed tempers.
Is BAg-2 easy to machine?
Reasonably — machinability is rated good (55/100, better than 86% of precious metal grades). Soft and gummy — machine only for preform trimming with sharp, high-rake tools; avoid generating fine dust because of cadmium toxicity.
Can BAg-2 be welded?
Not a structural weld filler; it is applied by brazing. Use an AWS FB3-A white flux or an inert/reducing furnace atmosphere, and do not braze in vacuum furnaces because of cadmium volatilisation.
What surface finishes work on BAg-2?
Fillets can be polished bright; remove corrosive flux residue with hot water/acid pickle; brazed assemblies can be plated if the Zn/Cd surface is properly cleaned.
Can BAg-2 be formed, bent or molded?
Excellent cold formability — readily drawn to fine wire, rolled to 0.05 mm foil and stamped into rings and preforms.
What is the maximum service temperature of BAg-2?
BAg-2 is rated for continuous use to about 200°C (392 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does BAg-2 cost?
BAg-2 is a high-cost precious metal ($$$$), 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 A5.8M/A5.8 Specification for Filler Metals for Brazing and Braze Welding — American Welding Society (2019)
- ASM Handbook Vol. 6 — Welding, Brazing and Soldering — ASM International (1993)
- Brazing Handbook, 5th ed. — American Welding Society (2007)
- Silver brazing alloy datasheets (35% Ag Cd-bearing grades) — Lucas-Milhaupt / Handy & Harman (2022)
- GB/T 10046 (2018)
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.