Precious Metal Ag134
EN L-Ag34Sn · GB BAg34CuZnSn
EN ISO 17672 Ag134 (L-Ag34Sn, BAg34CuZnSn) is a cadmium-free mid-silver Ag-Cu-Zn-Sn brazing filler functionally comparable to AWS BAg-7.
Reference datasheet — Ag134 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 R condition
Ag134 tempers and conditions
Ag134 is supplied in 4 conditions, soft to hard. R is the default FabDigit quotes; the values on this page are for it.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
As built (as printed) | Reference this condition for design checks on real joints: typical lap-shear strength and service temperature for steel or copper joints with a 0.05–0.15 mm brazing gap. | 180 | 350 | 22 | 90 HB | 15 % IACS |
Strip / foil, annealed | Use annealed strip or foil for stamped shims, rings and furnace-brazing interlayers, where 32% elongation eases forming and close contact but yield drops to 200 MPa. | 200 | 380 | 32 | 90 HB | 17 % IACS |
RDefault Bare rod / straight length | Choose the most widely stocked form, bright straight lengths of Ø1.5–3.0 mm × 500 mm, for manual flame brazing with a separately applied borax-fluoride flux. | 250 | 420 | 28 | 100 HB | 16 % IACS |
Hard-drawn wire | Choose spooled hard-drawn wire for automatic wire-feed induction or robotic brazing; cold work raises stiffness and feed stability but cuts elongation to 8%. | 430 | 520 | 8 | 138 HB | 15.5 % IACS |
Supply forms, finishes and certifications
Ways Ag134 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
PWD | Atomized powder / brazing paste | Supply form |
R-FC | Flux-coated rod | Supply form |
PRE | Ring / stamped preform | Surface finish |
What is Ag134?
EN ISO 17672 Ag134 (L-Ag34Sn, BAg34CuZnSn) is a cadmium-free mid-silver Ag-Cu-Zn-Sn brazing filler functionally comparable to AWS BAg-7. It brazes free-flowing at 730–800 °C with borax-fluoride flux and joint gaps of 0.05–0.15 mm, and is stocked as rod, flux-coated rod, annealed strip, hard-drawn wire, preforms and powder; as-brazed deposits show 420 MPa tensile strength, 250 MPa yield and 28 % elongation. Service is limited to 200 °C, and the zinc content excludes vacuum furnace brazing and calls for fume extraction. Ag145 raises deposit strength and lowers brazing temperature at higher silver cost. Ag134 has a density of 8.8 g/cm³ (0.318 lb/in³), lighter than 94% of precious metal grades. It melts at 630°C (1,166 °F). Ag134 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 28% and the elastic modulus is 85 GPa (12.3 Msi).
What is Ag134 used for?
- copper/brass pipe joints
- refrigeration components
- electrical/electronics brazing
- sheet-metal duct fittings
Advantages
- Low embodied carbon — 40 kg CO₂/kg, better than 96% of precious metal grades
- Lightweight — 8.8 g/cm³ (0.318 lb/in³), better than 94% of precious metal grades
- Easy to machine — 55/100, 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 — 55/100, worse than 94% of precious metal grades
- Hard to polish — 60/100, worse than 92% of precious metal grades
- Limited service temperature — 200°C (392 °F), worse than 89% of precious metal grades
- Limited formability — 70/100, worse than 78% of precious metal grades
Ag134 properties
Typical room-temperature values for Ag134-R; bars are the position among precious metal grades.
Physical3
Ag134 has a density of 8.8 g/cm³ (0.318 lb/in³), lighter than 94% of precious metal grades. It melts at 630°C (1,166 °F).
Mechanical13
Ag134 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 28% and the elastic modulus is 85 GPa (12.3 Msi).
Thermal6
Ag134 is rated for continuous service to 200°C (392 °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
Ag134 conducts electricity at 16 % IACS, worse than 60% of precious metal grades.
Chemical & Environmental3
Corrosion resistance is good (55/100), worse than 94% of precious metal grades.
Sustainability4
Producing a kilogram of Ag134 takes about 550 MJ of energy and emits 40 kg of CO₂ — less than 94% of precious metal grades. Typical recycled content is 40%.
Manufacturability8
Ag134's machinability is good (55/100, better than 86% of precious metal grades); weldability poor (30/100); 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. Ag134 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with Ag134
Is Ag134 easy to machine?
The filler itself is rarely machined; rod is soft and grabs the tool, so use sharp edges with large positive rake and low speed. Dress excess braze metal by filing or grinding rather than turning.
Can Ag134 be welded?
Not a fusion-weld material. Used as a braze filler at 730–800 °C with FH10 / AWS Type 3A borax-fluoride flux and a joint gap of 0.05–0.15 mm; the zinc content makes it unsuitable for vacuum furnace brazing, and local extraction is needed to control zinc fume.
Can Ag134 be formed, bent or molded?
Ductile in the annealed condition: it draws to 0.3 mm diameter wire, rolls to 0.1 mm strip and stamps into preform rings, with intermediate annealing at about 600 °C.
Ag134 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 |
|---|---|---|
| Agnominal 34% silver | 33 – 35 | 34 |
| Cu | 34 – 37 | 36 |
| Snreplaces cadmium; lowers liquidus and improves wetting | 2 – 3 | 2.5 |
| Cdcadmium-free grade, Cd ≤ 0.010% (RoHS/EU limit) | ≤ 0.01 | 0 |
| Pbimpurity limit | ≤ 0.03 | — |
| EN ISO 17672 total impurity limit | ≤ 0.15 | — |
| Znbalance, about 27-28% | balance | — |
What surface finishes work on Ag134?
Remove residual flux after brazing with hot water or an acid pickle, as fluoride-bearing residues are corrosive. Joints can be polished, nickel plated or silver plated to prevent sulphide tarnish; anodizing is not applicable.
Equivalent designations
Standards and trade names that resolve to Precious Metal Ag134 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- L-Ag34Sn
- GB (China)
- BAg34CuZnSn
How much does Ag134 cost?
Ag134 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.
Ag134 — frequently asked
What is Ag134 used for?
Ag134 is typically used for copper/brass pipe joints, refrigeration components, electrical/electronics brazing and sheet-metal duct fittings. In short: cadmium-free BAg-7 equivalent; most ductile deposit, 28 %; balanced cost and flow.
What is the yield strength of Ag134?
Ag134 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. Strength varies by condition: see the 4 listed tempers.
Is Ag134 easy to machine?
Reasonably — machinability is rated good (55/100, better than 86% of precious metal grades). The filler itself is rarely machined; rod is soft and grabs the tool, so use sharp edges with large positive rake and low speed. Dress excess braze metal by filing or grinding rather than turning.
Can Ag134 be welded?
Not readily — weldability is rated poor (30/100). Not a fusion-weld material. Used as a braze filler at 730–800 °C with FH10 / AWS Type 3A borax-fluoride flux and a joint gap of 0.05–0.15 mm; the zinc content makes it unsuitable for vacuum furnace brazing, and local extraction is needed to control zinc fume.
What surface finishes work on Ag134?
Remove residual flux after brazing with hot water or an acid pickle, as fluoride-bearing residues are corrosive. Joints can be polished, nickel plated or silver plated to prevent sulphide tarnish; anodizing is not applicable.
Can Ag134 be formed, bent or molded?
Ductile in the annealed condition: it draws to 0.3 mm diameter wire, rolls to 0.1 mm strip and stamps into preform rings, with intermediate annealing at about 600 °C.
What is the maximum service temperature of Ag134?
Ag134 is rated for continuous use to about 200°C (392 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between Ag134-R and Ag134 W-HD?
R is the default condition — choose the most widely stocked form, bright straight lengths of Ø1.5–3.0 mm × 500 mm, for manual flame brazing with a separately applied borax-fluoride flux. W-HD: choose spooled hard-drawn wire for automatic wire-feed induction or robotic brazing; cold work raises stiffness and feed stability but cuts elongation to 8%. Yield strength is 250 MPa in R versus 430 MPa in W-HD.
How much does Ag134 cost?
Ag134 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
- EN ISO 17672 Brazing — Filler metals (Ag134) — ISO/CEN (2016)
- AWS A5.8/A5.8M Specification for Filler Metals for Brazing and Braze Welding — AWS (2019)
- GB/T 10046 — SAC (2018)
- ASM Handbook Vol. 6 — Welding, Brazing and Soldering (Silver brazing filler metals) — ASM International (1993)
- Cadmium-free silver brazing alloy datasheets (Ag34Sn class) — Umicore / Lucas-Milhaupt / (2023)
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.