Precious Metal BAg-13
UNS P07540
BAg-13 (UNS P07540) is a nickel-bearing, cadmium-free silver brazing filler formulated for wetting and corrosion resistance on stainless and other alloy steels, at brazing temperatures above BAg-3.
Reference datasheet — BAg-13 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-13 tempers and conditions
BAg-13 is supplied in one standard condition, AS-BRAZED.
Supply forms, finishes and certifications
Ways BAg-13 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 |
RING | Preform ring / washer | Supply form |
STRIP | Strip / foil / shim | Supply form |
WIREDefault | Bare wire / rod | Supply form |
PASTE | Braze paste | Printing process |
POWDER | Atomised powder | Printing process |
What is BAg-13?
BAg-13 (UNS P07540) is a nickel-bearing, cadmium-free silver brazing filler formulated for wetting and corrosion resistance on stainless and other alloy steels, at brazing temperatures above BAg-3. It is chosen for joints that must resist corrosive service and see higher temperatures than standard Ag-Cu-Zn fillers, and is stocked as wire, flux-coated rod, strip, rings, powder and paste. The as-brazed deposit is about 430 MPa tensile with 22 % elongation and 120 HB. The 857–970 °C brazing range limits it to base metals that tolerate that heat, and the zinc content makes overheating and vacuum brazing problematic — use BAg-13a where zinc must be excluded. BAg-13 has a density of 9.6 g/cm³ (0.347 lb/in³), lighter than 80% of precious metal grades. It melts at 718°C (1,324 °F). BAg-13 has a yield strength of 250 MPa (36.3 ksi) and a tensile strength of 420 MPa (60.9 ksi) — stronger than 81% of precious metal grades. Elongation at break is 24% and the elastic modulus is 90 GPa (13.1 Msi).
What is BAg-13 used for?
- stainless steel food equipment
- chemical processing equipment
- aerospace assemblies
Advantages
- High strength — 250 MPa (36.3 ksi), better than 81% of precious metal grades
- Low embodied carbon — 62 kg CO₂/kg, better than 81% of precious metal grades
Limitations
- Limited formability — 70/100, worse than 78% of precious metal grades
- Hard to polish — 70/100, worse than 76% of precious metal grades
BAg-13 properties
Typical room-temperature values; bars are the position among precious metal grades.
Physical3
BAg-13 has a density of 9.6 g/cm³ (0.347 lb/in³), lighter than 80% of precious metal grades. It melts at 718°C (1,324 °F).
Mechanical8
BAg-13 has a yield strength of 250 MPa (36.3 ksi) and a tensile strength of 420 MPa (60.9 ksi) — stronger than 81% of precious metal grades. Elongation at break is 24% and the elastic modulus is 90 GPa (13.1 Msi).
Thermal6
BAg-13 is rated for continuous service to 400°C (752 °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 µm/m·K (10 µin/in·°F).
Electrical3
BAg-13 conducts electricity at 23 % IACS, better than 63% of precious metal grades.
Chemical & Environmental2
Corrosion resistance is very good (72/100), worse than 66% of precious metal grades.
Sustainability3
Producing a kilogram of BAg-13 takes about 800 MJ of energy and emits 62 kg of CO₂ — less than 83% of precious metal grades. Typical recycled content is 40%.
Manufacturability4
BAg-13's formability very good (70/100).
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-13 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with BAg-13
Is BAg-13 easy to machine?
Not a structural machining stock; the deposited fillet is soft and gummy — use sharp tools and light cuts if a joint must be dressed.
Can BAg-13 be welded?
Not fusion-welded; it is itself a filler — braze at 857–970 °C with an active silver-brazing flux (or in dry H2/vacuum for the flux-free version) and avoid overheating that volatilises zinc.
Can BAg-13 be formed, bent or molded?
Readily drawn to wire, rolled to 0.05 mm strip and stamped into rings; interanneal to avoid edge cracking in heavy reductions.
BAg-13 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 | 53 – 55 | 54 |
| Zn | 4 – 6 | 5 |
| Niwetting/corrosion addition | 0.5 – 1.5 | 1 |
| Cdimpurity limit; alloy is classed cadmium-free | ≤ 0.15 | |
| Others (total)total of other elements | ≤ 0.15 | |
| Curemainder, nominally ~40 % | balance |
What surface finishes work on BAg-13?
Remove all flux residue with hot water or acid pickle to prevent corrosion; the fillet can be polished or nickel/chrome plated, but avoid ammonia-based cleaners.
Equivalent designations
Standards and trade names that resolve to Precious Metal BAg-13 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- P07540
- Also called
- AWS BAg-13
How much does BAg-13 cost?
BAg-13 is a high-cost precious metal ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
BAg-13 — frequently asked
What is BAg-13 used for?
BAg-13 is typically used for stainless steel food equipment, chemical processing equipment and aerospace assemblies. In short: nickel-bearing for stainless wetting; higher braze range than BAg-3; cadmium-free corrosion-resistant filler.
What is the yield strength of BAg-13?
BAg-13 has a typical yield strength of 250 MPa (36.3 ksi) and a tensile strength of 420 MPa (60.9 ksi) — stronger than 81% of precious metal grades.
Is BAg-13 easy to machine?
Not a structural machining stock; the deposited fillet is soft and gummy — use sharp tools and light cuts if a joint must be dressed.
Can BAg-13 be welded?
Not fusion-welded; it is itself a filler — braze at 857–970 °C with an active silver-brazing flux (or in dry H2/vacuum for the flux-free version) and avoid overheating that volatilises zinc.
What surface finishes work on BAg-13?
Remove all flux residue with hot water or acid pickle to prevent corrosion; the fillet can be polished or nickel/chrome plated, but avoid ammonia-based cleaners.
Can BAg-13 be formed, bent or molded?
Readily drawn to wire, rolled to 0.05 mm strip and stamped into rings; interanneal to avoid edge cracking in heavy reductions.
What is the maximum service temperature of BAg-13?
BAg-13 is rated for continuous use to about 400°C (752 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does BAg-13 cost?
BAg-13 is a high-cost precious metal ($$$$), 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)
- GB/T 10046 — (Silver brazing filler metals) (2018)
- Silver brazing alloy datasheets (BAg series, melting ranges and mechanical data) — Lucas-Milhaupt / Handy & Harman (2022)
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.