Precious Metal BAg-24 AS-BRAZED
Heat-treated state
UNS P07505
Reference condition for joint design values; strength is governed by joint clearance, base metal and diffusion.
Values for the AS-BRAZED condition
What is BAg-24 AS-BRAZED?
BAg-24 AS-BRAZED is BAg-24 heat treated to AS-BRAZED — reference condition for joint design values; strength is governed by joint clearance, base metal and diffusion. BAg-24 AS-BRAZED has a yield strength of 250 MPa (36.3 ksi) and a tensile strength of 340 MPa (49.3 ksi) — stronger than 81% of precious metal grades. Elongation at break is 28% and the elastic modulus is 85 GPa (12.3 Msi). BAg-24 AS-BRAZED has a density of 9.3 g/cm³ (0.336 lb/in³), lighter than 85% of precious metal grades. It melts at 660°C (1,220 °F).
Advantages
- Low embodied carbon — 55 kg CO₂/kg, better than 86% of precious metal grades
- High strength — 250 MPa (36.3 ksi), better than 81% of precious metal grades
Limitations
- Needs corrosion protection — 62/100, worse than 83% of precious metal grades
- Hard to polish — 70/100, worse than 76% of precious metal grades
BAg-24 AS-BRAZED properties
Typical room-temperature values for BAg-24 AS-BRAZED; 3 are specific to this condition. Other listed values are BAg-24 reference data and may not represent this condition. Bars are the position among precious metal grades.
Physical3
BAg-24 AS-BRAZED has a density of 9.3 g/cm³ (0.336 lb/in³), lighter than 85% of precious metal grades. It melts at 660°C (1,220 °F).
Mechanical10
BAg-24 AS-BRAZED has a yield strength of 250 MPa (36.3 ksi) and a tensile strength of 340 MPa (49.3 ksi) — stronger than 81% of precious metal grades. Elongation at break is 28% and the elastic modulus is 85 GPa (12.3 Msi).
Thermal6
BAg-24 AS-BRAZED is rated for continuous service to 300°C (572 °F). It conducts heat at 90 W/m·K (52 BTU/hr·ft·°F), worse than 51% of precious metal grades. Thermal expansion is 18.5 µm/m·K (10.3 µin/in·°F).
Electrical3
BAg-24 AS-BRAZED conducts electricity at 22 % IACS, better than 61% of precious metal grades.
Chemical & Environmental2
Corrosion resistance is good (62/100), worse than 83% of precious metal grades.
Sustainability3
Producing a kilogram of BAg-24 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%.
Manufacturability5
BAg-24 AS-BRAZED's machinability is fair (45/100, better than 59% of precious metal grades); formability very good (75/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with BAg-24 AS-BRAZED
Is BAg-24 easy to machine?
Rarely machined — the alloy is soft and gummy; supply as drawn wire, rolled strip or stamped preforms instead of machined shapes.
Can BAg-24 be welded?
Not a structural weld filler; braze at 707–843 °C with a boron-modified fluoride flux (AWS FB3-A/C) or in inert gas, and heat quickly to limit zinc loss and Ni-rich sludge.
Can BAg-24 be formed, bent or molded?
Very ductile in the annealed state — draws to fine wire, rolls to foil and stamps into rings/washers with interanneals; work-hardens moderately.
What surface finishes work on BAg-24?
Wash off corrosive flux residue with hot water or acid pickle; the joint fillet takes light polishing and will tarnish in sulfur-bearing air, so plate or lacquer for decorative use.
BAg-24 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 |
|---|---|---|
| Ag | 49 – 51 | 50 |
| Cu | 19 – 21 | 20 |
| Niimproves wetting on stainless and cemented carbide | 1.5 – 2.5 | 2 |
| Cdcadmium-free limit | ≤ 0 | |
| Other elements, totalAWS A5.8 residual limit | ≤ 0.15 | |
| Znbalance in AWS A5.8 | ≥ 26 (balance) |
BAg-24 AS-BRAZED — frequently asked
What is BAg-24 AS-BRAZED used for?
BAg-24 AS-BRAZED is typically used for refrigeration/AC tubing, instrument brazing and cadmium-restricted general fabrication. In short: cadmium-free BAg-1a replacement; most ductile BAg filler; low brazing temperature range.
What is the yield strength of BAg-24 AS-BRAZED?
BAg-24 AS-BRAZED has a typical yield strength of 250 MPa (36.3 ksi) and a tensile strength of 340 MPa (49.3 ksi) — stronger than 81% of precious metal grades.
Is BAg-24 AS-BRAZED easy to machine?
Reasonably — machinability is rated fair (45/100, better than 59% of precious metal grades). Rarely machined — the alloy is soft and gummy; supply as drawn wire, rolled strip or stamped preforms instead of machined shapes.
Can BAg-24 AS-BRAZED be welded?
Not a structural weld filler; braze at 707–843 °C with a boron-modified fluoride flux (AWS FB3-A/C) or in inert gas, and heat quickly to limit zinc loss and Ni-rich sludge.
What surface finishes work on BAg-24 AS-BRAZED?
Wash off corrosive flux residue with hot water or acid pickle; the joint fillet takes light polishing and will tarnish in sulfur-bearing air, so plate or lacquer for decorative use.
Can BAg-24 AS-BRAZED be formed, bent or molded?
Very ductile in the annealed state — draws to fine wire, rolls to foil and stamps into rings/washers with interanneals; work-hardens moderately.
What is the maximum service temperature of BAg-24 AS-BRAZED?
BAg-24 AS-BRAZED is rated for continuous use to about 300°C (572 °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)
- GB/T 10046 (2018)
- ASM Handbook Vol. 6 — Welding, Brazing, and Soldering — ASM International (1993)
- AWS Brazing Handbook, 5th ed. — American Welding Society (2007)
- Cadmium-free silver brazing alloy (50 % Ag, Ni-bearing) datasheet — Lucas-Milhaupt / Handy & Harman (2022)
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.