Precious Metal PSr45 AS-BRAZED
Heat-treated state
GOST PSr45 (ПСр45)
Design values for the finished joint rather than for bulk filler wire.
Values for the AS-BRAZED condition
What is PSr45 AS-BRAZED?
PSr45 AS-BRAZED is PSr45 heat treated to AS-BRAZED — design values for the finished joint rather than for bulk filler wire. PSr45 AS-BRAZED has a yield strength of 200 MPa (29 ksi) and a tensile strength of 350 MPa (50.8 ksi) — stronger than 51% of precious metal grades. Elongation at break is 15% and the elastic modulus is 83 GPa (12 Msi). PSr45 AS-BRAZED has a density of 9.1 g/cm³ (0.329 lb/in³), lighter than 89% of precious metal grades. It melts at 660°C (1,220 °F).
Advantages
- Lightweight — 9.1 g/cm³ (0.329 lb/in³), better than 89% of precious metal grades
- Low embodied carbon — 58 kg CO₂/kg, better than 83% of precious metal grades
Limitations
- Limited service temperature — 200°C (392 °F), worse than 89% of precious metal grades
- Limited ductility — 15%, worse than 86% of precious metal grades
- 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
PSr45 AS-BRAZED properties
Typical room-temperature values for PSr45 AS-BRAZED; 4 are specific to this condition. Other listed values are PSr45 reference data and may not represent this condition. Bars are the position among precious metal grades.
Physical3
PSr45 AS-BRAZED has a density of 9.1 g/cm³ (0.329 lb/in³), lighter than 89% of precious metal grades. It melts at 660°C (1,220 °F).
Mechanical9
PSr45 AS-BRAZED has a yield strength of 200 MPa (29 ksi) and a tensile strength of 350 MPa (50.8 ksi) — stronger than 51% of precious metal grades. Elongation at break is 15% and the elastic modulus is 83 GPa (12 Msi).
Thermal6
PSr45 AS-BRAZED is rated for continuous service to 200°C (392 °F). It conducts heat at 110 W/m·K (63.6 BTU/hr·ft·°F), better than 60% of precious metal grades. Thermal expansion is 19 µm/m·K (10.6 µin/in·°F).
Electrical3
PSr45 AS-BRAZED 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 PSr45 AS-BRAZED takes about 705 MJ of energy and emits 58 kg of CO₂ — less than 89% of precious metal grades. Typical recycled content is 45%.
Manufacturability7
PSr45 AS-BRAZED's machinability is fair (45/100, better than 59% of precious metal grades); weldability poor (20/100); formability very good (80/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with PSr45 AS-BRAZED
Is PSr45 easy to machine?
Rarely machined; soft and gummy — use sharp positive-rake tools, high speed, light feed, avoid smearing.
Can PSr45 be welded?
Not a structural weld alloy; joined by brazing itself — keep torch heat off the filler, heat the base metal and let it melt the rod.
Can PSr45 be formed, bent or molded?
Annealed material draws to fine wire and rolls to foil readily; interstage anneal at ~600 °C after ~50 % reduction.
What surface finishes work on PSr45?
Braze with a boron/fluoride flux (FB3-A / ПВ209 class), remove flux residue in hot water or acid; joint can be polished or plated (Ni/Sn) to reduce tarnish.
PSr45 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 |
|---|---|---|
| Ag45 ± 0.5 % per GOST 19738 | 44.5 – 45.5 | 45 |
| Cu30 ± 0.5 % | 29.5 – 30.5 | 30 |
| Pbimpurity limit | ≤ 0.01 | — |
| Biimpurity limit | ≤ 0.01 | — |
| Feimpurity limit | ≤ 0.1 | — |
| Cdcadmium-free grade | ≤ 0.01 | — |
| Znbalance, nominally ~25 % | balance | — |
PSr45 AS-BRAZED — frequently asked
What is PSr45 AS-BRAZED used for?
PSr45 AS-BRAZED is typically used for copper and brass pipe brazing, general fabrication brazing and HVAC service brazing. In short: GOST workhorse silver braze; AWS BAg-1 role; balanced cost and flow.
What is the yield strength of PSr45 AS-BRAZED?
PSr45 AS-BRAZED has a typical yield strength of 200 MPa (29 ksi) and a tensile strength of 350 MPa (50.8 ksi) — stronger than 51% of precious metal grades.
Is PSr45 AS-BRAZED easy to machine?
Reasonably — machinability is rated fair (45/100, better than 59% of precious metal grades). Rarely machined; soft and gummy — use sharp positive-rake tools, high speed, light feed, avoid smearing.
Can PSr45 AS-BRAZED be welded?
Not readily — weldability is rated poor (20/100). Not a structural weld alloy; joined by brazing itself — keep torch heat off the filler, heat the base metal and let it melt the rod.
What surface finishes work on PSr45 AS-BRAZED?
Braze with a boron/fluoride flux (FB3-A / ПВ209 class), remove flux residue in hot water or acid; joint can be polished or plated (Ni/Sn) to reduce tarnish.
Can PSr45 AS-BRAZED be formed, bent or molded?
Annealed material draws to fine wire and rolls to foil readily; interstage anneal at ~600 °C after ~50 % reduction.
What is the maximum service temperature of PSr45 AS-BRAZED?
PSr45 AS-BRAZED 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
- GOST 19738-74 Silver brazing alloys — grades and composition — Gosstandart (1974)
- AWS A5.8/A5.8M Specification for Filler Metals for Brazing (BAg-5 comparison) — AWS (2019)
- ASM Handbook Vol. 6 — Welding, Brazing and Soldering — ASM International (1993)
- 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.