Copper Alloy CuAg0.04(OF)-R360
Supply condition
EN CuAg0.04(OF)
R360 = hard drawn wire
Heavily drawn fine wire for windings and braids needing high tensile and softening resistance after enamelling.
Values for the R360 condition
Other CuAg0.04(OF) tempers and conditions
CuAg0.04(OF) is listed in 7 conditions; see the grade overview at CuAg0.04(OF).
Compare all 7 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
R200Default annealed, soft rod & wire | Pick for maximum conductivity, deep drawing, bending, cold heading and vacuum-brazed assemblies. | 70 | 225 | 45 | 45 HB | 101 % IACS |
Thermomechanically controlled processed | Cheapest mill condition for stock that will be redrawn, forged or fully annealed by the user. | 80 | 220 | 40 | 50 HB | 100.5 % IACS |
light cold worked / quarter hard | Straight, stiffer rod that still bends and rivets; used for busbar links and machined contacts. | 180 | 260 | 25 | 72 HB | 100 % IACS |
Half hard drawn rod/profile | Common stocked drawn temper: good balance of strength, straightness and machining behaviour. | 200 | 270 | 15 | 80 HB | 99.5 % IACS |
hard drawn | Hard-drawn condition for commutator bars, rotor bars and contacts that must resist softening after soldering. | 270 | 320 | 8 | 95 HB | 98.5 % IACS |
extra hard drawn | Highest strength rod/section where stiffness and creep/softening resistance outrank formability. | 300 | 345 | 5 | 105 HB | 98 % IACS |
R360This page Hard drawn wire | Heavily drawn fine wire for windings and braids needing high tensile and softening resistance after enamelling. | 340 | 385 | 2.5 | 115 HB | 97.5 % IACS |
What is CuAg0.04(OF)-R360?
CuAg0.04(OF)-R360 is CuAg0.04(OF) supplied in the R360 condition — heavily drawn fine wire for windings and braids needing high tensile and softening resistance after enamelling. CuAg0.04(OF)-R360 has a yield strength of 340 MPa (49.3 ksi) and a tensile strength of 385 MPa (55.8 ksi) — stronger than 71% of copper alloy grades. Elongation at break is 2.5% and the elastic modulus is 120 GPa (17.4 Msi). CuAg0.04(OF)-R360 has a density of 8.93 g/cm³ (0.323 lb/in³), heavier than 82% of copper alloy grades. It melts at 1,083°C (1,981 °F). R200 is the default condition FabDigit quotes; R360 is available on request or by drawing note.
Advantages
- High electrical conductivity — 97.5 % IACS, better than 93% of copper alloy grades
- Conducts heat well — 379 W/m·K (219 BTU/hr·ft·°F), better than 91% of copper alloy grades
- Readily welded — 65/100, better than 80% of copper alloy grades
Limitations
- Limited ductility — 2.5%, worse than 97% of copper alloy grades
CuAg0.04(OF)-R360 properties
Typical room-temperature values for CuAg0.04(OF)-R360; 20 are specific to this condition. Other listed values are CuAg0.04(OF) reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
CuAg0.04(OF)-R360 has a density of 8.93 g/cm³ (0.323 lb/in³), heavier than 82% of copper alloy grades. It melts at 1,083°C (1,981 °F).
Mechanical13
CuAg0.04(OF)-R360 has a yield strength of 340 MPa (49.3 ksi) and a tensile strength of 385 MPa (55.8 ksi) — stronger than 71% of copper alloy grades. Elongation at break is 2.5% and the elastic modulus is 120 GPa (17.4 Msi).
Thermal6
CuAg0.04(OF)-R360 is rated for continuous service to 200°C (392 °F). It conducts heat at 379 W/m·K (219 BTU/hr·ft·°F), better than 91% of copper alloy grades. Thermal expansion is 17.7 µm/m·K (9.83 µin/in·°F).
Electrical3
CuAg0.04(OF)-R360 conducts electricity at 97.5 % IACS, better than 93% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (62/100), worse than 57% of copper alloy grades.
Sustainability4
Producing a kilogram of CuAg0.04(OF)-R360 takes about 60 MJ of energy and emits 4.2 kg of CO₂ — more than 69% of copper alloy grades. Typical recycled content is 8%.
Manufacturability8
CuAg0.04(OF)-R360's machinability is poor (32/100, worse than 57% of copper alloy grades); weldability good (65/100); formability poor (25/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with CuAg0.04(OF)-R360
Is CuAg0.04(OF) easy to machine?
Gummy, long-chipping: use sharp positive-rake carbide or PCD tools, high speed (200–400 m/min), light feeds with generous flood coolant; expect ~20 % of AISI 1212 productivity — switch to C14500/C14700 if heavy turning is needed.
Can CuAg0.04(OF) be welded?
TIG/MIG, EB and laser welding are all practical with no hydrogen-embrittlement risk; preheat 200–400 °C on thick sections to overcome the huge thermal conductivity, keep interpass low and avoid oxidising flames.
Can CuAg0.04(OF) be formed, bent or molded?
Excellent cold formability in R200 — deep draws, cold heading and tight bends; interstage anneal 400–600 °C, and remember silver only raises the softening point, it does not prevent recrystallisation above ~450 °C.
What surface finishes work on CuAg0.04(OF)?
Not anodisable; bright-dip, mechanically polish or electropolish, then tin/silver/nickel plate or lacquer to control tarnish; ideal substrate for hydrogen or vacuum brazing because there are no oxide inclusions.
CuAg0.04(OF) 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 addition raises softening/recrystallisation temperature | 0.03 – 0.05 | 0.04 |
| Ooxygen-free, ≤10 ppm | ≤ 0 | 5×10⁻⁴ |
| Pkept low to protect conductivity | ≤ 3×10⁻⁴ | — |
| Bi | ≤ 5×10⁻⁴ | — |
| Pb | ≤ 5×10⁻⁴ | — |
| S | ≤ 0 | — |
| Te | ≤ 2×10⁻⁴ | — |
| Se | ≤ 2×10⁻⁴ | — |
| Cu+Agminimum Cu+Ag per EN 1977 / EN 13601 | ≥ 99.95 | 99.97 |
| Cu | balance | — |
CuAg0.04(OF)-R360 — frequently asked
What is CuAg0.04(OF)-R360 used for?
CuAg0.04(OF)-R360 is typically used for electronic lead-frame stock, vacuum-brazed assemblies and high-temperature electronic conductors. In short: oxygen-free with silver; 101 % IACS conductivity; vacuum-braze compatible.
What is the yield strength of CuAg0.04(OF)-R360?
CuAg0.04(OF)-R360 has a typical yield strength of 340 MPa (49.3 ksi) and a tensile strength of 385 MPa (55.8 ksi) — stronger than 71% of copper alloy grades. Strength varies by condition: see the 7 listed tempers.
Is CuAg0.04(OF)-R360 easy to machine?
Not especially — machinability is rated poor (32/100, worse than 57% of copper alloy grades). Gummy, long-chipping: use sharp positive-rake carbide or PCD tools, high speed (200–400 m/min), light feeds with generous flood coolant; expect ~20 % of AISI 1212 productivity — switch to C14500/C14700 if heavy turning is needed.
Can CuAg0.04(OF)-R360 be welded?
Yes — weldability is rated good (65/100). TIG/MIG, EB and laser welding are all practical with no hydrogen-embrittlement risk; preheat 200–400 °C on thick sections to overcome the huge thermal conductivity, keep interpass low and avoid oxidising flames.
What surface finishes work on CuAg0.04(OF)-R360?
Not anodisable; bright-dip, mechanically polish or electropolish, then tin/silver/nickel plate or lacquer to control tarnish; ideal substrate for hydrogen or vacuum brazing because there are no oxide inclusions.
Can CuAg0.04(OF)-R360 be formed, bent or molded?
Excellent cold formability in R200 — deep draws, cold heading and tight bends; interstage anneal 400–600 °C, and remember silver only raises the softening point, it does not prevent recrystallisation above ~450 °C.
What is the maximum service temperature of CuAg0.04(OF)-R360?
CuAg0.04(OF)-R360 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 CuAg0.04(OF)-R200 and CuAg0.04(OF)-R360?
R200 is the default condition — pick for maximum conductivity, deep drawing, bending, cold heading and vacuum-brazed assemblies. R360: heavily drawn fine wire for windings and braids needing high tensile and softening resistance after enamelling. Yield strength is 70 MPa in R200 versus 340 MPa in R360.
Sources
- EN 1977 — Copper and copper alloys: copper drawing stock (wire rod) — CEN (2013)
- EN 13601 — Copper rod, bar and wire for general electrical purposes — CEN (2021)
- EN 13602 — Drawn round copper wire for electrical conductors — CEN (2013)
- ASTM B152/B152M and B187 — Copper (incl. C10500 silver-bearing oxygen-free) — ASTM (2019)
- CDA alloy datasheet C10500 (OFS, silver-bearing oxygen-free copper) — Copper Development Association (2023)
- ASM Handbook Vol.2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- ASM Handbook Vol.13B — Corrosion: Materials (copper) — ASM International (2005)
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.