Precious Metal Ag145-ANN (Annealed)
Heat-treated state
EN L-Ag45Sn · GB BAg45CuZnSn
Choose when the filler must be bent, coiled tightly or formed into shapes at the bench.
Values for the ANN condition
Other Ag145 tempers and conditions
Ag145 is listed in 2 conditions; see the grade overview at Ag145.
- AS-BRAZED
- ANN
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 |
ANNThis page Annealed | Choose when the filler must be bent, coiled tightly or formed into shapes at the bench. | 220 | 400 | 30 | 85 HB | 21 % IACS |
What is Ag145-ANN?
Ag145-ANN is Ag145 heat treated to ANN — choose when the filler must be bent, coiled tightly or formed into shapes at the bench. Ag145-ANN has a yield strength of 220 MPa (31.9 ksi) and a tensile strength of 400 MPa (58 ksi) — stronger than 67% of precious metal grades. Elongation at break is 30% and the elastic modulus is 85 GPa (12.3 Msi). Ag145-ANN 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).
Advantages
- 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
Ag145-ANN properties
Typical room-temperature values for Ag145-ANN; 19 are specific to this condition. Other listed values are Ag145 reference data and may not represent this condition. Bars are the position among precious metal grades.
Physical3
Ag145-ANN 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-ANN has a yield strength of 220 MPa (31.9 ksi) and a tensile strength of 400 MPa (58 ksi) — stronger than 67% of precious metal grades. Elongation at break is 30% and the elastic modulus is 85 GPa (12.3 Msi).
Thermal6
Ag145-ANN 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-ANN conducts electricity at 21 % IACS, better than 57% 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-ANN 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-ANN's machinability is fair (40/100, worse than 60% of precious metal grades); weldability poor (20/100); formability excellent (88/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with Ag145-ANN
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.
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.
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 | — |
Ag145-ANN — frequently asked
What is Ag145-ANN used for?
Ag145-ANN 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-ANN?
Ag145-ANN has a typical yield strength of 220 MPa (31.9 ksi) and a tensile strength of 400 MPa (58 ksi) — stronger than 67% of precious metal grades. Strength varies by condition: see the 2 listed tempers.
Is Ag145-ANN easy to machine?
Not especially — machinability is rated fair (40/100, worse than 60% 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-ANN 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-ANN?
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-ANN 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-ANN?
Ag145-ANN 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.
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. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.