Precious Metal BAg-22 AS-BRAZED
Heat-treated state
UNS P07490
Property set for the solidified fillet/joint after brazing at 700–845 °C.
Values for the AS-BRAZED condition
What is BAg-22 AS-BRAZED?
BAg-22 AS-BRAZED is BAg-22 heat treated to AS-BRAZED — property set for the solidified fillet/joint after brazing at 700–845 °C. BAg-22 AS-BRAZED has a yield strength of 340 MPa (49.3 ksi) and a tensile strength of 450 MPa (65.3 ksi) — stronger than 94% of precious metal grades. Elongation at break is 15% and the elastic modulus is 90 GPa (13.1 Msi). BAg-22 AS-BRAZED 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).
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
- Limited ductility — 15%, worse than 86% 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
BAg-22 AS-BRAZED properties
Typical room-temperature values for BAg-22 AS-BRAZED; 5 are specific to this condition. Other listed values are BAg-22 reference data and may not represent this condition. Bars are the position among precious metal grades.
Physical3
BAg-22 AS-BRAZED 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 AS-BRAZED has a yield strength of 340 MPa (49.3 ksi) and a tensile strength of 450 MPa (65.3 ksi) — stronger than 94% of precious metal grades. Elongation at break is 15% and the elastic modulus is 90 GPa (13.1 Msi).
Thermal6
BAg-22 AS-BRAZED 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 AS-BRAZED 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 AS-BRAZED 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
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with BAg-22 AS-BRAZED
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.
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.
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) |
BAg-22 AS-BRAZED — frequently asked
What is BAg-22 AS-BRAZED used for?
BAg-22 AS-BRAZED 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 AS-BRAZED?
BAg-22 AS-BRAZED has a typical yield strength of 340 MPa (49.3 ksi) and a tensile strength of 450 MPa (65.3 ksi) — stronger than 94% of precious metal grades.
Is BAg-22 AS-BRAZED 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 AS-BRAZED 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 AS-BRAZED?
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 AS-BRAZED 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 AS-BRAZED?
BAg-22 AS-BRAZED 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.
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. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.