Copper Alloy CuAg0.10(OF)-R200
Temper · default condition
EN CuAg0.10(OF)
R200 = r200 / O60
Default stock condition: maximum ductility and conductivity for deep drawing, bending, vacuum-component machining and brazed assemblies.
Values for the R200 condition
Other CuAg0.10(OF) tempers and conditions
CuAg0.10(OF) is listed in 6 conditions; see the grade overview at CuAg0.10(OF).
Compare all 6 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Thermomechanically controlled processed | Billet, cast bar or as-extruded rod bought for further working or remelting; mechanical properties not guaranteed. | 55 | 210 | 40 | 42 HB | 100.5 % IACS |
R200DefaultThis page R200 / O60 | Default stock condition: maximum ductility and conductivity for deep drawing, bending, vacuum-component machining and brazed assemblies. | 70 | 225 | 45 | 45 HB | 101 % IACS |
R240 / H01 | Light cold draw for straight rod/bar that still needs some bending and staking ductility. | 180 | 255 | 20 | 75 HB | 100 % IACS |
R280 / H04 | Standard hard-drawn rod/wire for commutator bars, contacts and conductors that must resist softening near solder/braze heat. | 255 | 300 | 10 | 95 HB | 99 % IACS |
R320 / H06 | Heavily drawn small-section rod/wire where higher yield and straightness matter more than bendability. | 300 | 340 | 5 | 108 HB | 98.5 % IACS |
R360 / H08 | Maximum cold-work condition for fine silver-copper wire (windings, leads) needing high tensile and anti-softening capability. | 345 | 385 | 3 | 68 HRB | 98 % IACS |
What is CuAg0.10(OF)-R200?
CuAg0.10(OF)-R200 is CuAg0.10(OF) in the R200 temper — default stock condition: maximum ductility and conductivity for deep drawing, bending, vacuum-component machining and brazed assemblies. CuAg0.10(OF)-R200 has a yield strength of 70 MPa (10.2 ksi) and a tensile strength of 225 MPa (32.6 ksi) — weaker than 93% of copper alloy grades. Elongation at break is 45% and the elastic modulus is 117 GPa (17 Msi). CuAg0.10(OF)-R200 has a density of 8.94 g/cm³ (0.323 lb/in³), heavier than 90% of copper alloy grades. It melts at 1,075°C (1,967 °F).
Advantages
- Conducts heat well — 391 W/m·K (225.9 BTU/hr·ft·°F), better than 98% of copper alloy grades
- High electrical conductivity — 101 % IACS, better than 98% of copper alloy grades
- High service temperature — 350°C (662 °F), better than 95% of copper alloy grades
- Forms and bends easily — 95/100, better than 94% of copper alloy grades
- Ductile — tolerates forming and impact — 45%, better than 91% of copper alloy grades
Limitations
- Difficult to machine — 20/100, worse than 98% of copper alloy grades
- Low strength — 70 MPa (10.2 ksi), worse than 93% of copper alloy grades
CuAg0.10(OF)-R200 properties
Typical room-temperature values for CuAg0.10(OF)-R200; 15 are specific to this condition. Other listed values are CuAg0.10(OF) reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
CuAg0.10(OF)-R200 has a density of 8.94 g/cm³ (0.323 lb/in³), heavier than 90% of copper alloy grades. It melts at 1,075°C (1,967 °F).
Mechanical13
CuAg0.10(OF)-R200 has a yield strength of 70 MPa (10.2 ksi) and a tensile strength of 225 MPa (32.6 ksi) — weaker than 93% of copper alloy grades. Elongation at break is 45% and the elastic modulus is 117 GPa (17 Msi).
Thermal6
CuAg0.10(OF)-R200 is rated for continuous service to 350°C (662 °F). It conducts heat at 391 W/m·K (225.9 BTU/hr·ft·°F), better than 98% of copper alloy grades. Thermal expansion is 17.7 µm/m·K (9.83 µin/in·°F).
Electrical3
CuAg0.10(OF)-R200 conducts electricity at 101 % IACS, better than 98% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is very good (70/100), better than 76% of copper alloy grades.
Sustainability4
Producing a kilogram of CuAg0.10(OF)-R200 takes about 57 MJ of energy and emits 3.9 kg of CO₂ — less than 52% of copper alloy grades. Typical recycled content is 20%.
Manufacturability8
CuAg0.10(OF)-R200's machinability is poor (20/100, worse than 98% of copper alloy grades); weldability good (65/100); formability excellent (95/100).
Common Calculations5
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with CuAg0.10(OF)-R200
Is CuAg0.10(OF) easy to machine?
Gummy and stringy — use sharp, high-positive-rake polished tools, high speed with light-to-moderate feed and flood emulsion; expect ~20 % of AISI 1212 productivity and prefer a cold-worked temper over the annealed state.
Can CuAg0.10(OF) be welded?
Best joined by electron-beam, laser, TIG/MIG with helium and high preheat (400–600 °C for thick sections) or by brazing; being oxygen-free it will not suffer hydrogen embrittlement, but heat-affected zones lose the cold-work strength.
Can CuAg0.10(OF) be formed, bent or molded?
Excellent cold formability in R200 (deep draw, spin, upset, cold head); interanneal 400–600 °C between heavy reductions, and remember the silver raises the recrystallisation temperature so anneals run hotter/longer than for pure Cu.
What surface finishes work on CuAg0.10(OF)?
Not anodisable — deburr and polish easily to a mirror finish, then electroplate Ni/Ag/Au or apply a benzotriazole/lacquer passivation; vacuum parts are typically vapour-degreased and hydrogen- or vacuum-fired.
CuAg0.10(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 for softening/creep resistance | 0.08 – 0.12 | 0.1 |
| Ooxygen-free, ≤10 ppm | ≤ 0 | 5×10⁻⁴ |
| Pkept low to preserve conductivity | ≤ 3×10⁻⁴ | — |
| Bi | ≤ 5×10⁻⁴ | — |
| Pb | ≤ 5×10⁻⁴ | — |
| S | ≤ 0 | — |
| Te | ≤ 2×10⁻⁴ | — |
| Se | ≤ 2×10⁻⁴ | — |
| Cu (incl. Ag)Cu+Ag ≥ 99.95 %; remainder trace impurities | ≥ 99.95 (balance) | — |
CuAg0.10(OF)-R200 — frequently asked
What is CuAg0.10(OF)-R200 used for?
CuAg0.10(OF)-R200 is typically used for superconducting cable stabilizer, high-temperature electronic connectors and aerospace/vacuum electrical parts. In short: highest softening resistance, 350 °C; oxygen-free vacuum-grade copper; 101 % IACS conductivity.
What is the yield strength of CuAg0.10(OF)-R200?
CuAg0.10(OF)-R200 has a typical yield strength of 70 MPa (10.2 ksi) and a tensile strength of 225 MPa (32.6 ksi) — weaker than 93% of copper alloy grades. Strength varies by condition: see the 6 listed tempers.
Is CuAg0.10(OF)-R200 easy to machine?
Not especially — machinability is rated poor (20/100, worse than 98% of copper alloy grades). Gummy and stringy — use sharp, high-positive-rake polished tools, high speed with light-to-moderate feed and flood emulsion; expect ~20 % of AISI 1212 productivity and prefer a cold-worked temper over the annealed state.
Can CuAg0.10(OF)-R200 be welded?
Yes — weldability is rated good (65/100). Best joined by electron-beam, laser, TIG/MIG with helium and high preheat (400–600 °C for thick sections) or by brazing; being oxygen-free it will not suffer hydrogen embrittlement, but heat-affected zones lose the cold-work strength.
What surface finishes work on CuAg0.10(OF)-R200?
Not anodisable — deburr and polish easily to a mirror finish, then electroplate Ni/Ag/Au or apply a benzotriazole/lacquer passivation; vacuum parts are typically vapour-degreased and hydrogen- or vacuum-fired.
Can CuAg0.10(OF)-R200 be formed, bent or molded?
Excellent cold formability in R200 (deep draw, spin, upset, cold head); interanneal 400–600 °C between heavy reductions, and remember the silver raises the recrystallisation temperature so anneals run hotter/longer than for pure Cu.
What is the maximum service temperature of CuAg0.10(OF)-R200?
CuAg0.10(OF)-R200 is rated for continuous use to about 350°C (662 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between CuAg0.10(OF)-R200 and CuAg0.10(OF)-R360?
R200 is the default condition — default stock condition: maximum ductility and conductivity for deep drawing, bending, vacuum-component machining and brazed assemblies. R360: maximum cold-work condition for fine silver-copper wire (windings, leads) needing high tensile and anti-softening capability. Yield strength is 70 MPa in R200 versus 345 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 1412 — Copper and copper alloys: European numbering system — CEN (2016)
- CDA alloy datasheet C10700 (oxygen-free, silver-bearing copper) — Copper Development Association (2023)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- ASM Handbook Vol. 13B — Corrosion: Materials — 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.