Precious Metal BAg-5 HARD-DRAWN
Supply condition
GB BAg45CuZn
Pick when stiffer, springier wire is needed for automatic feeding or preform stamping.
Values for the HARD-DRAWN condition
Other BAg-5 tempers and conditions
BAg-5 is listed in 2 conditions; see the grade overview at BAg-5.
- AS-BRAZED
- HARD-DRAWN
Compare all 2 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
As-brazed joint (fillet/lap joint in service) | Reference condition for design: properties of the solidified filler in a properly gapped 0.05–0.13 mm lap joint. | 170 | 380 | 18 | 98 HB | 22 % IACS |
HARD-DRAWNThis page cold worked, no final anneal | Pick when stiffer, springier wire is needed for automatic feeding or preform stamping. | 400 | 520 | 8 | 155 HB | 21 % IACS |
What is BAg-5 HARD-DRAWN?
BAg-5 HARD-DRAWN is BAg-5 supplied in the HARD-DRAWN condition — pick when stiffer, springier wire is needed for automatic feeding or preform stamping. BAg-5 HARD-DRAWN has a yield strength of 400 MPa (58 ksi) and a tensile strength of 520 MPa (75.4 ksi) — stronger than 96% of precious metal grades. Elongation at break is 8% and the elastic modulus is 85 GPa (12.3 Msi). BAg-5 HARD-DRAWN has a density of 9.1 g/cm³ (0.329 lb/in³), lighter than 89% of precious metal grades. It melts at 675°C (1,247 °F).
Advantages
- Easy to machine — 60/100, better than 97% of precious metal grades
- High strength — 400 MPa (58 ksi), better than 96% of precious metal grades
- Lightweight — 9.1 g/cm³ (0.329 lb/in³), better than 89% of precious metal grades
- Low embodied carbon — 55 kg CO₂/kg, better than 86% of precious metal grades
Limitations
- Limited service temperature — 150°C (302 °F), worse than 100% of precious metal grades
- Limited ductility — 8%, worse than 92% of precious metal grades
- Limited formability — 45/100, worse than 91% 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-5 HARD-DRAWN properties
Typical room-temperature values for BAg-5 HARD-DRAWN; 19 are specific to this condition. Other listed values are BAg-5 reference data and may not represent this condition. Bars are the position among precious metal grades.
Physical3
BAg-5 HARD-DRAWN has a density of 9.1 g/cm³ (0.329 lb/in³), lighter than 89% of precious metal grades. It melts at 675°C (1,247 °F).
Mechanical9
BAg-5 HARD-DRAWN has a yield strength of 400 MPa (58 ksi) and a tensile strength of 520 MPa (75.4 ksi) — stronger than 96% of precious metal grades. Elongation at break is 8% and the elastic modulus is 85 GPa (12.3 Msi).
Thermal6
BAg-5 HARD-DRAWN is rated for continuous service to 150°C (302 °F). It conducts heat at 95 W/m·K (54.9 BTU/hr·ft·°F), better than 51% of precious metal grades. Thermal expansion is 18.5 µm/m·K (10.3 µin/in·°F).
Electrical3
BAg-5 HARD-DRAWN 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-5 HARD-DRAWN takes about 780 MJ of energy and emits 55 kg of CO₂ — less than 86% of precious metal grades. Typical recycled content is 40%.
Manufacturability6
BAg-5 HARD-DRAWN's machinability is good (60/100, better than 97% of precious metal grades); formability fair (45/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with BAg-5 HARD-DRAWN
Is BAg-5 easy to machine?
Rarely machined; the alloy is gummy — use sharp high-rake tools, light feeds and flood coolant, and collect all chips for precious-metal recovery.
Can BAg-5 be welded?
Not a weldable structural alloy — it is itself the filler; braze at 745–845 °C with a white (fluoride/borate) flux, short heating cycles to limit zinc fume loss.
Can BAg-5 be formed, bent or molded?
Readily cold drawn to fine wire and rolled to foil with interstage anneals; preform rings and washers are stamped from strip.
What surface finishes work on BAg-5?
Joints are water-quenched or wire-brushed to remove glassy flux residue; the alloy tarnishes in sulphurous air, so plate or lacquer where appearance matters.
BAg-5 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 |
|---|---|---|
| AgAWS A5.8 BAg-5 | 44 – 46 | 45 |
| Cu | 29 – 31 | 30 |
| Cdcadmium-free grade | ≤ 0.01 | — |
| Other (total)total of all other elements | ≤ 0.15 | — |
| Zn | ≥ 23 (balance) | — |
BAg-5 HARD-DRAWN — frequently asked
What is BAg-5 HARD-DRAWN used for?
BAg-5 HARD-DRAWN is typically used for HVAC refrigeration joints, plumbing fittings and tool brazing. In short: general-purpose 45 % Ag filler; cadmium-free brazing alloy; stocked in seven product forms.
What is the yield strength of BAg-5 HARD-DRAWN?
BAg-5 HARD-DRAWN has a typical yield strength of 400 MPa (58 ksi) and a tensile strength of 520 MPa (75.4 ksi) — stronger than 96% of precious metal grades. Strength varies by condition: see the 2 listed tempers.
Is BAg-5 HARD-DRAWN easy to machine?
Reasonably — machinability is rated good (60/100, better than 97% of precious metal grades). Rarely machined; the alloy is gummy — use sharp high-rake tools, light feeds and flood coolant, and collect all chips for precious-metal recovery.
Can BAg-5 HARD-DRAWN be welded?
Not a weldable structural alloy — it is itself the filler; braze at 745–845 °C with a white (fluoride/borate) flux, short heating cycles to limit zinc fume loss.
What surface finishes work on BAg-5 HARD-DRAWN?
Joints are water-quenched or wire-brushed to remove glassy flux residue; the alloy tarnishes in sulphurous air, so plate or lacquer where appearance matters.
Can BAg-5 HARD-DRAWN be formed, bent or molded?
Readily cold drawn to fine wire and rolled to foil with interstage anneals; preform rings and washers are stamped from strip.
What is the maximum service temperature of BAg-5 HARD-DRAWN?
BAg-5 HARD-DRAWN is rated for continuous use to about 150°C (302 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Sources
- AWS A5.8/A5.8M — Specification for Filler Metals for Brazing and Braze Welding — AWS (2019)
- ASME BPVC Section II Part C, SFA-5.8 — ASME (2023)
- GB/T 10046 — SAC (2018)
- ASM Handbook Vol. 6 — Welding, Brazing and Soldering — ASM International (1993)
- Silver brazing alloy technical data (45% Ag cadmium-free) — Lucas-Milhaupt / Handy & Harman (2022)
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.