Precious Metal BAg-22
UNS P07490
BAg-22 is a manganese-bearing, cadmium-free silver braze filler (UNS P07490) in the AWS BAg family, formulated to flow and wet much like cadmium-containing tin-bronze fillers.
Reference datasheet — BAg-22 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.
BAg-22 tempers and conditions
BAg-22 is supplied in one standard condition, AS-BRAZED.
Supply forms, finishes and certifications
Ways BAg-22 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
FC-ROD | Flux-coated rod | Supply form |
STRIP | Strip / Preform | Supply form |
WIREDefault | Wire / Rod | Supply form |
PASTE | Powder plus flux and organic binder in syringe or cartridge | Printing process |
POWDER | Atomized powder (typ. −100/+325 mesh) for paste and tape | Printing process |
What is BAg-22?
BAg-22 is a manganese-bearing, cadmium-free silver braze filler (UNS P07490) in the AWS BAg family, formulated to flow and wet much like cadmium-containing tin-bronze fillers. It is chosen where cadmium emissions are unacceptable but comparable capillary behaviour is still needed, and is available as wire, strip, powder, paste and flux-coated rod. As-brazed tensile strength is 480 MPa with 20% elongation. Manganese oxidizes readily, so fluoride-bearing flux or a reducing atmosphere is required, and the 700–845 °C range limits use on temperature-sensitive base metals; BAg-24 is the nearest drop-in alternative for lower-temperature work. BAg-22 has a density of 9 g/cm³ (0.325 lb/in³), lighter than 92% of precious metal grades. It melts at 680°C (1,256 °F). BAg-22 has a yield strength of 340 MPa (49.3 ksi) and a tensile strength of 480 MPa (69.6 ksi) — stronger than 94% of precious metal grades. Elongation at break is 20% and the elastic modulus is 90 GPa (13.1 Msi).
What is BAg-22 used for?
- general fabrication brazing
- HVAC components
- cadmium-restricted manufacturing environments
Advantages
- High strength — 340 MPa (49.3 ksi), better than 94% of precious metal grades
- Lightweight — 9 g/cm³ (0.325 lb/in³), better than 92% of precious metal grades
- Low embodied carbon — 55 kg CO₂/kg, better than 86% of precious metal grades
Limitations
- Needs corrosion protection — 55/100, worse than 94% of precious metal grades
- Poor heat conductor — 50 W/m·K (28.9 BTU/hr·ft·°F), worse than 79% of precious metal grades
- Low electrical conductivity — 10 % IACS, worse than 79% of precious metal grades
- Limited ductility — 20%, worse than 77% of precious metal grades
BAg-22 properties
Typical room-temperature values; bars are the position among precious metal grades.
Physical3
BAg-22 has a density of 9 g/cm³ (0.325 lb/in³), lighter than 92% of precious metal grades. It melts at 680°C (1,256 °F).
Mechanical9
BAg-22 has a yield strength of 340 MPa (49.3 ksi) and a tensile strength of 480 MPa (69.6 ksi) — stronger than 94% of precious metal grades. Elongation at break is 20% and the elastic modulus is 90 GPa (13.1 Msi).
Thermal6
BAg-22 is rated for continuous service to 400°C (752 °F). It conducts heat at 50 W/m·K (28.9 BTU/hr·ft·°F), worse than 79% of precious metal grades. Thermal expansion is 18.5 µm/m·K (10.3 µin/in·°F).
Electrical3
BAg-22 conducts electricity at 10 % IACS, worse than 79% of precious metal grades.
Chemical & Environmental2
Corrosion resistance is good (55/100), worse than 94% of precious metal grades.
Sustainability3
Producing a kilogram of BAg-22 takes about 800 MJ of energy and emits 55 kg of CO₂ — less than 83% of precious metal grades. Typical recycled content is 40%.
Manufacturability1
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-22 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with BAg-22
Is BAg-22 easy to machine?
Filler metal is not a structural machining stock; brazed fillets are soft-to-medium and can be ground or lightly machined with sharp carbide tooling.
Can BAg-22 be welded?
Applied by torch, induction, furnace or resistance brazing at 700–845 °C; keep time above liquidus short and use fluoride-bearing (AWS FB3-C/D) flux or reducing atmosphere to control Mn oxidation.
Can BAg-22 be formed, bent or molded?
Supplied as drawn wire, rolled strip and stamped preforms; the alloy is ductile enough for cold rolling and preform blanking with intermediate anneals.
BAg-22 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 | 48 – 50 | 49 |
| Cu | 15 – 17 | 16 |
| Mnimproves wetting of carbide and stainless | 7 – 8 | 7.5 |
| Niimproves joint ductility and erosion resistance | 4 – 5 | 4.5 |
| Cdcadmium-free grade | ≤ 0.01 | 0 |
| Others (total) | ≤ 0.15 | |
| Zn | ≥ 21 (balance) |
What surface finishes work on BAg-22?
Remove residual flux with hot water or acid rinse to avoid corrosive residues; fillets can be polished or plated, but the Mn/Zn-bearing surface tarnishes in sulphide atmospheres.
Equivalent designations
Standards and trade names that resolve to Precious Metal BAg-22 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- P07490
- Also called
- AWS BAg-22
How much does BAg-22 cost?
BAg-22 is a high-cost precious metal ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
BAg-22 — frequently asked
What is BAg-22 used for?
BAg-22 is typically used for general fabrication brazing, HVAC components and cadmium-restricted manufacturing environments. In short: cadmium-free tin-bronze substitute; strongest low-temperature BAg option; wide product form availability.
What is the yield strength of BAg-22?
BAg-22 has a typical yield strength of 340 MPa (49.3 ksi) and a tensile strength of 480 MPa (69.6 ksi) — stronger than 94% of precious metal grades.
Is BAg-22 easy to machine?
Filler metal is not a structural machining stock; brazed fillets are soft-to-medium and can be ground or lightly machined with sharp carbide tooling.
Can BAg-22 be welded?
Applied by torch, induction, furnace or resistance brazing at 700–845 °C; keep time above liquidus short and use fluoride-bearing (AWS FB3-C/D) flux or reducing atmosphere to control Mn oxidation.
What surface finishes work on BAg-22?
Remove residual flux with hot water or acid rinse to avoid corrosive residues; fillets can be polished or plated, but the Mn/Zn-bearing surface tarnishes in sulphide atmospheres.
Can BAg-22 be formed, bent or molded?
Supplied as drawn wire, rolled strip and stamped preforms; the alloy is ductile enough for cold rolling and preform blanking with intermediate anneals.
What is the maximum service temperature of BAg-22?
BAg-22 is rated for continuous use to about 400°C (752 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does BAg-22 cost?
BAg-22 is a high-cost precious metal ($$$$), 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)
- ASTM B260 Standard Specification for Brazing Filler Metal — ASTM International (2022)
- Brazing Handbook, 5th ed. — American Welding Society (2007)
- ASM Handbook Vol.6 — Welding, Brazing and Soldering — ASM International (1993)
- Silver brazing alloy datasheets (BAg series) — 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.