Precious Metal Ag145
EN L-Ag45Sn · GB BAg45CuZnSn
EN ISO 17672 Ag145 (L-Ag45Sn, BAg45CuZnSn) is a cadmium-free Ag-Cu-Zn-Sn brazing filler that replaces AWS BAg-1 where cadmium is restricted under RoHS and REACH.
Reference datasheet — Ag145 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.
Ag145 tempers and conditions
Ag145 is supplied in 2 conditions, soft to hard.
Compare all 2 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
As-brazed joint (steel lap joint) | Property set for the finished joint rather than the filler wire — use for joint strength sizing. | 200 | 350 | 25 | 90 HB | 20 % IACS |
Annealed | Choose when the filler must be bent, coiled tightly or formed into shapes at the bench. | 220 | 400 | 30 | 85 HB | 21 % IACS |
Supply forms, finishes and certifications
Ways Ag145 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 | Flux-coated rod | Supply form |
RING | Preform ring / washer | Supply form |
RODDefault | Bare rod / wire, as-drawn | Supply form |
STRIP | Rolled strip / foil | Supply form |
PASTE | Atomised powder in flux/binder paste | Printing process |
What is Ag145?
EN ISO 17672 Ag145 (L-Ag45Sn, BAg45CuZnSn) is a cadmium-free Ag-Cu-Zn-Sn brazing filler that replaces AWS BAg-1 where cadmium is restricted under RoHS and REACH. It is widely stocked in Europe as rod, flux-coated rod, wire, strip, rings and paste, brazes at 670–690 °C and gives deposits of 450 MPa tensile strength, 340 MPa yield and 20 % elongation. The zinc content requires fast heating and fume extraction and rules out vacuum furnace brazing. Ag134 or Ag130 lower the silver cost where a higher brazing temperature is acceptable. Ag145 has a density of 9.1 g/cm³ (0.329 lb/in³), lighter than 89% of precious metal grades. It melts at 640°C (1,184 °F). Ag145 has a yield strength of 340 MPa (49.3 ksi) and a tensile strength of 450 MPa (65.3 ksi) — stronger than 94% of precious metal grades. Elongation at break is 20% and the elastic modulus is 85 GPa (12.3 Msi).
What is Ag145 used for?
- HVAC and refrigeration copper tube joints
- plumbing fittings
- electrical contact brazing
- general steel/copper fabrication brazing
Advantages
- High strength — 340 MPa (49.3 ksi), better than 94% of precious metal grades
- Lightweight — 9.1 g/cm³ (0.329 lb/in³), better than 89% of precious metal grades
- Low embodied carbon — 52 kg CO₂/kg, better than 89% of precious metal grades
Limitations
- 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
- Needs corrosion protection — 60/100, worse than 88% of precious metal grades
- Difficult to weld — 20/100, worse than 86% of precious metal grades
- Limited ductility — 20%, worse than 77% of precious metal grades
Ag145 properties
Typical room-temperature values; bars are the position among precious metal grades.
Physical3
Ag145 has a density of 9.1 g/cm³ (0.329 lb/in³), lighter than 89% of precious metal grades. It melts at 640°C (1,184 °F).
Mechanical10
Ag145 has a yield strength of 340 MPa (49.3 ksi) and a tensile strength of 450 MPa (65.3 ksi) — stronger than 94% of precious metal grades. Elongation at break is 20% and the elastic modulus is 85 GPa (12.3 Msi).
Thermal6
Ag145 is rated for continuous service to 200°C (392 °F). It conducts heat at 100 W/m·K (57.8 BTU/hr·ft·°F), better than 55% of precious metal grades. Thermal expansion is 18.5 µm/m·K (10.3 µin/in·°F).
Electrical3
Ag145 conducts electricity at 20 % IACS, better than 53% of precious metal grades.
Chemical & Environmental3
Corrosion resistance is good (60/100), worse than 88% of precious metal grades.
Sustainability4
Producing a kilogram of Ag145 takes about 710 MJ of energy and emits 52 kg of CO₂ — less than 88% of precious metal grades. Typical recycled content is 35%.
Manufacturability7
Ag145's machinability is fair (45/100, better than 59% of precious metal grades); weldability poor (20/100); formability very good (80/100).
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. Ag145 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with Ag145
Is Ag145 easy to machine?
Soft and gummy — turned or slit only for preform production; use sharp tools and light feeds, though the alloy is normally supplied ready-formed.
Can Ag145 be welded?
Not welded; it is applied by torch, induction, furnace (with flux or in controlled atmosphere) or resistance brazing at 670–690 °C with fast heating to limit zinc loss.
Can Ag145 be formed, bent or molded?
Readily drawn to fine wire, rolled to 0.05 mm strip and blanked into rings; interanneal at about 550–600 °C when heavy cold work is applied.
Ag145 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 defines the grade | 44 – 46 | 45 |
| Cu | 26 – 28 | 27 |
| Sncadmium replacement, lowers melting range | 2.5 – 3.5 | 2.5 |
| Cdcadmium-free grade, RoHS/REACH limit | ≤ 0.01 | — |
| Pb | ≤ 0.03 | — |
| other impurities (total)per EN ISO 17672 impurity limits | ≤ 0.15 | — |
| Zn | balance | — |
What surface finishes work on Ag145?
Remove corrosive flux residues with hot water or 10 % citric/sulphuric pickle immediately after brazing; the light-coloured fillet can be wire-brushed or polished and takes electroplating.
Equivalent designations
Standards and trade names that resolve to Precious Metal Ag145 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- L-Ag45Sn
- GB (China)
- BAg45CuZnSn
How much does Ag145 cost?
Ag145 is a high-cost precious metal ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Ag145 — frequently asked
What is Ag145 used for?
Ag145 is typically used for HVAC and refrigeration copper tube joints, plumbing fittings, electrical contact brazing and general steel/copper fabrication brazing. In short: cadmium-free BAg-1 substitute; lowest brazing temperature here; highest-strength deposit in family.
What is the yield strength of Ag145?
Ag145 has a typical yield strength of 340 MPa (49.3 ksi) and a tensile strength of 450 MPa (65.3 ksi) — stronger than 94% of precious metal grades. Strength varies by condition: see the 2 listed tempers.
Is Ag145 easy to machine?
Reasonably — machinability is rated fair (45/100, better than 59% of precious metal grades). Soft and gummy — turned or slit only for preform production; use sharp tools and light feeds, though the alloy is normally supplied ready-formed.
Can Ag145 be welded?
Not readily — weldability is rated poor (20/100). Not welded; it is applied by torch, induction, furnace (with flux or in controlled atmosphere) or resistance brazing at 670–690 °C with fast heating to limit zinc loss.
What surface finishes work on Ag145?
Remove corrosive flux residues with hot water or 10 % citric/sulphuric pickle immediately after brazing; the light-coloured fillet can be wire-brushed or polished and takes electroplating.
Can Ag145 be formed, bent or molded?
Readily drawn to fine wire, rolled to 0.05 mm strip and blanked into rings; interanneal at about 550–600 °C when heavy cold work is applied.
What is the maximum service temperature of Ag145?
Ag145 is rated for continuous use to about 200°C (392 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does Ag145 cost?
Ag145 is a high-cost precious metal ($$$$), 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 (Ag145) — ISO/CEN (2016)
- AWS A5.8/A5.8M Specification for Filler Metals for Brazing and Braze Welding — AWS (2019)
- ASM Handbook Vol.6 — Welding, Brazing and Soldering — ASM International (1993)
- Silver brazing alloy (45 % Ag cadmium-free) technical data — Johnson Matthey / Umicore / Lucas-Milhaupt (2023)
- GB/T 10046 — SAC (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.