Precious Metal BAg-23
UNS P07850
BAg-23 is a high-silver, cadmium-free braze filler (UNS P07850) with a high melting range, intended for demanding high-temperature and corrosion-resistant brazed joints.
Reference datasheet — BAg-23 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-23 tempers and conditions
BAg-23 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-23 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
STRIP-FOIL | Strip / Foil | Supply form |
Wire-Ann | Annealed Wire/Rod | Supply form |
WIRE-HD | Hard Drawn Wire | Supply form |
PASTE | + | Printing process |
POWDER | 100/+325 | Printing process |
What is BAg-23?
BAg-23 is a high-silver, cadmium-free braze filler (UNS P07850) with a high melting range, intended for demanding high-temperature and corrosion-resistant brazed joints. It is used in aerospace and jet engine assemblies where joint integrity must hold to about 450 °C, and is stocked as annealed and hard-drawn wire, strip and foil, powder and paste. As-brazed tensile strength is 340 MPa with 20% elongation. The 971–1038 °C brazing range demands vacuum or very dry hydrogen and rules out temperature-sensitive base metals; BAg-21 is the alternative when a lower brazing temperature is required. BAg-23 has a density of 9.8 g/cm³ (0.354 lb/in³), lighter than 75% of precious metal grades. It melts at 960°C (1,760 °F). BAg-23 has a yield strength of 180 MPa (26.1 ksi) and a tensile strength of 340 MPa (49.3 ksi) — weaker than 59% of precious metal grades. Elongation at break is 20% and the elastic modulus is 85 GPa (12.3 Msi).
What is BAg-23 used for?
- aerospace high-temperature joints
- corrosion-resistant assemblies
- jet engine parts
Limitations
- Low electrical conductivity — 8 % IACS, worse than 86% of precious metal grades
- Poor heat conductor — 45 W/m·K (26 BTU/hr·ft·°F), worse than 82% of precious metal grades
- Limited ductility — 20%, worse than 77% of precious metal grades
- Hard to polish — 70/100, worse than 76% of precious metal grades
BAg-23 properties
Typical room-temperature values for BAg-23-AS-BRAZED; bars are the position among precious metal grades.
Physical3
BAg-23 has a density of 9.8 g/cm³ (0.354 lb/in³), lighter than 75% of precious metal grades. It melts at 960°C (1,760 °F).
Mechanical10
BAg-23 has a yield strength of 180 MPa (26.1 ksi) and a tensile strength of 340 MPa (49.3 ksi) — weaker than 59% of precious metal grades. Elongation at break is 20% and the elastic modulus is 85 GPa (12.3 Msi).
Thermal6
BAg-23 is rated for continuous service to 450°C (842 °F). It conducts heat at 45 W/m·K (26 BTU/hr·ft·°F), worse than 82% of precious metal grades. Thermal expansion is 19.5 µm/m·K (10.8 µin/in·°F).
Electrical3
BAg-23 conducts electricity at 8 % IACS, worse than 86% of precious metal grades.
Chemical & Environmental2
Corrosion resistance is very good (72/100), worse than 66% of precious metal grades.
Sustainability4
Producing a kilogram of BAg-23 takes about 1,350 MJ of energy and emits 115 kg of CO₂ — less than 59% of precious metal grades. Typical recycled content is 35%.
Manufacturability7
BAg-23's machinability is fair (40/100, worse than 60% of precious metal grades); weldability poor (30/100); 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-23 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with BAg-23
Is BAg-23 easy to machine?
Very soft and prone to smearing, so it is generally not machined; shear or stamp it into preplaced rings and shims as required, using sharp positive-rake tooling with ample lubricant.
Can BAg-23 be welded?
This is the filler metal itself. Braze at 971–1038 °C, preferably in vacuum or dry hydrogen with a dew point below -50 °C; brazing in air requires a high-temperature active flux of the AWS FB3-C type.
Can BAg-23 be formed, bent or molded?
Ductility in the annealed condition is good — it draws to 0.3 mm wire and rolls to 0.05 mm foil. Above roughly 50% cold reduction, intermediate anneal at 600–700 °C in a protective atmosphere to prevent manganese oxidation.
BAg-23 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 |
|---|---|---|
| Agrange specified by AWS A5.8 | 84 – 86 | 85 |
| Cdcadmium-free formulation | ≤ 0 | 0 |
| ZnZn-free; suitable for vacuum components | ≤ 0 | 0 |
| Other (total)maximum total of other elements | ≤ 0.15 | |
| Mnbalance is manganese | ≥ 14 (balance) |
What surface finishes work on BAg-23?
Remove flux residue after brazing by hot water or mechanical cleaning. Joints can be polished; long exposure to sulphur-bearing environments darkens the surface, so nickel plate or apply a protective coating where appearance matters.
Equivalent designations
Standards and trade names that resolve to Precious Metal BAg-23 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- P07850
- Also called
- AWS BAg-23
How much does BAg-23 cost?
BAg-23 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-23 — frequently asked
What is BAg-23 used for?
BAg-23 is typically used for aerospace high-temperature joints, corrosion-resistant assemblies and jet engine parts. In short: highest brazing temperature BAg; 450 °C service capability; vacuum-furnace brazing grade.
What is the yield strength of BAg-23?
BAg-23 has a typical yield strength of 180 MPa (26.1 ksi) and a tensile strength of 340 MPa (49.3 ksi) — weaker than 59% of precious metal grades.
Is BAg-23 easy to machine?
Not especially — machinability is rated fair (40/100, worse than 60% of precious metal grades). Very soft and prone to smearing, so it is generally not machined; shear or stamp it into preplaced rings and shims as required, using sharp positive-rake tooling with ample lubricant.
Can BAg-23 be welded?
Not readily — weldability is rated poor (30/100). This is the filler metal itself. Braze at 971–1038 °C, preferably in vacuum or dry hydrogen with a dew point below -50 °C; brazing in air requires a high-temperature active flux of the AWS FB3-C type.
What surface finishes work on BAg-23?
Remove flux residue after brazing by hot water or mechanical cleaning. Joints can be polished; long exposure to sulphur-bearing environments darkens the surface, so nickel plate or apply a protective coating where appearance matters.
Can BAg-23 be formed, bent or molded?
Ductility in the annealed condition is good — it draws to 0.3 mm wire and rolls to 0.05 mm foil. Above roughly 50% cold reduction, intermediate anneal at 600–700 °C in a protective atmosphere to prevent manganese oxidation.
What is the maximum service temperature of BAg-23?
BAg-23 is rated for continuous use to about 450°C (842 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does BAg-23 cost?
BAg-23 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)
- ASM Handbook Vol. 6 — Welding, Brazing and Soldering (Brazing Filler Metals) — ASM International (1993)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys (Precious Metals) — ASM International (1990)
- 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.