Precious Metal BAg-33
UNS P07252
BAg-33 (UNS P07252) is a low-silver brazing filler metal in the AWS BAg family, with nickel and manganese additions that improve wetting on stainless steel compared with BAg-26 and BAg-27.
Reference datasheet — BAg-33 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-33 tempers and conditions
BAg-33 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-33 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
FLUX-COATED | Flux-coated rod | Supply form |
POWDER-PASTE | Powder / paste | Supply form |
PREFORM | Rings, washers and formed shapes | Supply form |
STRIP | Strip / foil | Supply form |
Wire-Ann | Wire / rod, annealed (soft) filler stock | Supply form |
WIRE-HD | Wire, hard drawn | Supply form |
What is BAg-33?
BAg-33 (UNS P07252) is a low-silver brazing filler metal in the AWS BAg family, with nickel and manganese additions that improve wetting on stainless steel compared with BAg-26 and BAg-27. It is used to keep silver content and cost down on stainless assemblies and is stocked as annealed and hard-drawn wire, strip, preforms, flux-coated rod and powder paste. Typical values are 240 MPa yield, 400 MPa tensile, 22 % elongation, 105 HB and service to 250 °C. The data on file describes the alloy as cadmium-free while the brazing procedure specifies cadmium fume control, so confirm composition on the certificate and exhaust the work area. BAg-33 has a density of 9.3 g/cm³ (0.336 lb/in³), lighter than 85% of precious metal grades. It melts at 607°C (1,125 °F). BAg-33 has a yield strength of 240 MPa (34.8 ksi) and a tensile strength of 400 MPa (58 ksi) — stronger than 73% of precious metal grades. Elongation at break is 22% and the elastic modulus is 85 GPa (12.3 Msi).
What is BAg-33 used for?
- Stainless steel fabrication
- Stainless tube and fitting joints
- General brazing under cadmium restrictions
- Flux-coated rod repair brazing
- Stamped ring and shim preforms
- Paste-dispensed production brazing
Advantages
- Low embodied carbon — 35 kg CO₂/kg, better than 97% of precious metal grades
Limitations
- Needs corrosion protection — 52/100, worse than 99% of precious metal grades
- Limited formability — 70/100, worse than 78% of precious metal grades
- Hard to polish — 70/100, worse than 76% of precious metal grades
BAg-33 properties
Typical room-temperature values for BAg-33-AS-BRAZED; bars are the position among precious metal grades.
Physical3
BAg-33 has a density of 9.3 g/cm³ (0.336 lb/in³), lighter than 85% of precious metal grades. It melts at 607°C (1,125 °F).
Mechanical9
BAg-33 has a yield strength of 240 MPa (34.8 ksi) and a tensile strength of 400 MPa (58 ksi) — stronger than 73% of precious metal grades. Elongation at break is 22% and the elastic modulus is 85 GPa (12.3 Msi).
Thermal6
BAg-33 is rated for continuous service to 250°C (482 °F). It conducts heat at 80 W/m·K (46.2 BTU/hr·ft·°F), worse than 54% of precious metal grades. Thermal expansion is 18.5 µm/m·K (10.3 µin/in·°F).
Electrical3
BAg-33 conducts electricity at 19 % IACS, worse than 51% of precious metal grades.
Chemical & Environmental3
Corrosion resistance is fair (52/100), worse than 99% of precious metal grades.
Sustainability3
Producing a kilogram of BAg-33 takes about 420 MJ of energy and emits 35 kg of CO₂ — less than 98% of precious metal grades. Typical recycled content is 40%.
Manufacturability6
BAg-33's machinability is fair (45/100, better than 59% of precious metal grades); 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-33 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with BAg-33
Is BAg-33 easy to machine?
Rarely machined; the deposit is soft and gummy — use sharp tools, and always capture dust/fume because of cadmium toxicity.
Can BAg-33 be welded?
This is a filler metal, not a weldable structural alloy; braze at 682–760 °C with a fast-heating torch/induction cycle, an active fluoride-bearing flux, and forced local exhaust to control cadmium fume — never fusion-weld over the deposit.
Can BAg-33 be formed, bent or molded?
Readily drawn to fine wire, rolled to strip and stamped into rings/washers; interstage anneals restore ductility after heavy cold reduction.
BAg-33 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 |
|---|---|---|
| Agsilver content fixes the 25 % class (UNS P07252) | 24 – 26 | 25 |
| Cu | 29 – 31 | 30 |
| Cdcadmium lowers the melting range and improves flow; toxic fume — RoHS/REACH restricted | 16.5 – 18.5 | 17.5 |
| Others (total)AWS A5.8 limit on total other elements | ≤ 0.15 | |
| Zn | balance |
What surface finishes work on BAg-33?
Clean flux residue with hot water or 5–10 % citric/sulfuric pickle immediately after brazing; the joint takes plating and polishing well but darkens in sulfur-bearing atmospheres.
Equivalent designations
Standards and trade names that resolve to Precious Metal BAg-33 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- P07252
- Also called
- AWS BAg-33
How much does BAg-33 cost?
BAg-33 is a high-cost precious metal ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
BAg-33 — frequently asked
What is BAg-33 used for?
BAg-33 is typically used for stainless steel fabrication, stainless tube and fitting joints, general brazing under cadmium restrictions, flux-coated rod repair brazing, stamped ring and shim preforms and paste-dispensed production brazing. In short: low-silver stainless wetting; cost-reduced BAg-26/27 alternative; low brazing temperature range.
What is the yield strength of BAg-33?
BAg-33 has a typical yield strength of 240 MPa (34.8 ksi) and a tensile strength of 400 MPa (58 ksi) — stronger than 73% of precious metal grades.
Is BAg-33 easy to machine?
Reasonably — machinability is rated fair (45/100, better than 59% of precious metal grades). Rarely machined; the deposit is soft and gummy — use sharp tools, and always capture dust/fume because of cadmium toxicity.
Can BAg-33 be welded?
This is a filler metal, not a weldable structural alloy; braze at 682–760 °C with a fast-heating torch/induction cycle, an active fluoride-bearing flux, and forced local exhaust to control cadmium fume — never fusion-weld over the deposit.
What surface finishes work on BAg-33?
Clean flux residue with hot water or 5–10 % citric/sulfuric pickle immediately after brazing; the joint takes plating and polishing well but darkens in sulfur-bearing atmospheres.
Can BAg-33 be formed, bent or molded?
Readily drawn to fine wire, rolled to strip and stamped into rings/washers; interstage anneals restore ductility after heavy cold reduction.
What is the maximum service temperature of BAg-33?
BAg-33 is rated for continuous use to about 250°C (482 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does BAg-33 cost?
BAg-33 is a high-cost precious metal ($$$$), 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)
- GB/T 10046 — SAC / (2018)
- ASM Handbook Vol. 6 — Welding, Brazing and Soldering (brazing filler metal data) — ASM International (1993)
- AWS Brazing Handbook, 5th ed. — American Welding Society (2007)
- UNS Metals & Alloys in the Unified Numbering System (P07252) — SAE/ASTM (2017)
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.