Precious Metal BAg-35
UNS P07351
Modern cadmium-free Ag-Cu-Zn-based filler developed as a drop-in flow/wetting replacement for the older cadmium-bearing BAg-2 class alloy, eliminating cadmium fume hazard in general fabrication brazing.
Reference datasheet — BAg-35 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-35 tempers and conditions
BAg-35 is supplied in one standard condition, AS-BRAZED.
Supply forms, finishes and certifications
Ways BAg-35 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
ANN-RODDefault | Annealed bare rod / wire | Supply form |
FLUX-COAT | Flux-coated rod | Supply form |
HD-WIRE | Hard-drawn wire | Supply form |
STRIP | Rolled strip / foil and stamped preforms | Supply form |
PASTE | Brazing paste | Printing process |
What is BAg-35?
Modern cadmium-free Ag-Cu-Zn-based filler developed as a drop-in flow/wetting replacement for the older cadmium-bearing BAg-2 class alloy, eliminating cadmium fume hazard in general fabrication brazing. BAg-35 has a density of 9 g/cm³ (0.325 lb/in³), lighter than 92% of precious metal grades. It melts at 685°C (1,265 °F). BAg-35 has a yield strength of 240 MPa (34.8 ksi) and a tensile strength of 420 MPa (60.9 ksi) — stronger than 73% of precious metal grades. Elongation at break is 28% and the elastic modulus is 87 GPa (12.6 Msi).
What is BAg-35 used for?
- general steel and copper alloy brazing
- HVAC/refrigeration repair
- replacement for cadmium-bearing fillers
Advantages
- Low embodied carbon — 42 kg CO₂/kg, better than 94% of precious metal grades
- Lightweight — 9 g/cm³ (0.325 lb/in³), better than 92% of precious metal grades
- Easy to machine — 55/100, better than 86% of precious metal grades
Limitations
- Difficult to weld — 20/100, worse than 86% of precious metal grades
- 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-35 properties
Typical room-temperature values; bars are the position among precious metal grades.
Physical3
BAg-35 has a density of 9 g/cm³ (0.325 lb/in³), lighter than 92% of precious metal grades. It melts at 685°C (1,265 °F).
Mechanical15
BAg-35 has a yield strength of 240 MPa (34.8 ksi) and a tensile strength of 420 MPa (60.9 ksi) — stronger than 73% of precious metal grades. Elongation at break is 28% and the elastic modulus is 87 GPa (12.6 Msi).
Thermal6
BAg-35 is rated for continuous service to 370°C (698 °F). It conducts heat at 90 W/m·K (52 BTU/hr·ft·°F), worse than 51% of precious metal grades. Thermal expansion is 19 µm/m·K (10.6 µin/in·°F).
Electrical3
BAg-35 conducts electricity at 21 % IACS, better than 57% of precious metal grades.
Chemical & Environmental3
Corrosion resistance is good (62/100), worse than 83% of precious metal grades.
Sustainability4
Producing a kilogram of BAg-35 takes about 570 MJ of energy and emits 42 kg of CO₂ — less than 93% of precious metal grades. Typical recycled content is 45%.
Manufacturability8
BAg-35's machinability is good (55/100, better than 86% of precious metal grades); weldability poor (20/100); formability excellent (85/100).
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-35 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with BAg-35
Is BAg-35 easy to machine?
Rarely machined; the alloy is soft and gummy — use sharp tooling and light cuts, or buy preforms instead.
Can BAg-35 be welded?
Not a fusion-weld material; it is the filler itself — braze at 760–870 °C with FB3-A (white) flux and heat the base metal, not the rod.
Can BAg-35 be formed, bent or molded?
Excellent hot and cold workability: continuously cast then drawn to wire, rolled to strip and stamped into rings, shims and washers with interanneals.
BAg-35 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 per AWS A5.8 / UNS P07351 | 34 – 36 | 35 |
| Cu | 31 – 33 | 32 |
| Cdcadmium-free grade; residual only | ≤ 0.01 | 0 |
| Pbimpurity limit | ≤ 0.03 | |
| Other (total)sum of unspecified elements | ≤ 0.15 | |
| Zn | balance |
What surface finishes work on BAg-35?
Joints are used as-brazed after full flux-residue removal (hot water/citric or mechanical); fillets can be polished or subsequently nickel/tin plated.
Equivalent designations
Standards and trade names that resolve to Precious Metal BAg-35 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- P07351
How much does BAg-35 cost?
BAg-35 is a high-cost precious metal ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
BAg-35 — frequently asked
What is BAg-35 used for?
BAg-35 is typically used for general steel and copper alloy brazing, HVAC/refrigeration repair and replacement for cadmium-bearing fillers. In short: cadmium-free BAg-2 replacement; general-purpose silver filler; excellent wire and strip formability.
What is the yield strength of BAg-35?
BAg-35 has a typical yield strength of 240 MPa (34.8 ksi) and a tensile strength of 420 MPa (60.9 ksi) — stronger than 73% of precious metal grades.
Is BAg-35 easy to machine?
Reasonably — machinability is rated good (55/100, better than 86% of precious metal grades). Rarely machined; the alloy is soft and gummy — use sharp tooling and light cuts, or buy preforms instead.
Can BAg-35 be welded?
Not readily — weldability is rated poor (20/100). Not a fusion-weld material; it is the filler itself — braze at 760–870 °C with FB3-A (white) flux and heat the base metal, not the rod.
What surface finishes work on BAg-35?
Joints are used as-brazed after full flux-residue removal (hot water/citric or mechanical); fillets can be polished or subsequently nickel/tin plated.
Can BAg-35 be formed, bent or molded?
Excellent hot and cold workability: continuously cast then drawn to wire, rolled to strip and stamped into rings, shims and washers with interanneals.
What is the maximum service temperature of BAg-35?
BAg-35 is rated for continuous use to about 370°C (698 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does BAg-35 cost?
BAg-35 is a high-cost precious metal ($$$$), 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)
- Brazing Handbook, 5th ed. — American Welding Society (2007)
- ASM Handbook Vol. 6 — Welding, Brazing and Soldering — ASM International (1993)
- Silver brazing alloy datasheets (Silver-flo / Braze series) — Johnson Matthey / Lucas-Milhaupt (2022)
- 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.