Copper Alloy CuAg0.07(OF)
EN CuAg0.07(OF)
CuAg0.07(OF) (CR018A) is a medium-silver oxygen-free copper rod grade supplied annealed (M) and in tempers R200 through R360.
Reference datasheet — CuAg0.07(OF) is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the R200 condition
CuAg0.07(OF) tempers and conditions
CuAg0.07(OF) is supplied in 7 conditions, soft to hard. R200 is the default FabDigit quotes; the values on this page are for it.
Compare all 7 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
R200Default annealed, soft | Choose for maximum ductility, deep drawing, bending and forming, and for maximum conductivity after brazing. | 70 | 225 | 45 | 45 HB | 100.5 % IACS |
Thermomechanically controlled processed | Mill stock supplied without specified mechanical properties, for customers who will draw, forge or anneal it themselves. | 70 | 210 | 40 | 42 HB | 100 % IACS |
quarter hard, lightly drawn | Light cold work for straight, dimensionally stable rod that still bends without cracking. | 150 | 240 | 30 | 58 HB | 100 % IACS |
half hard | Best balance of strength and formability for busbar, commutator segments and machined electrical parts. | 200 | 265 | 20 | 80 HB | 99.5 % IACS |
drawn, medium hard | Standard drawn rod temper for machined contacts and screw-machine parts needing straightness and chip control. | 220 | 275 | 15 | 88 HB | 99 % IACS |
hard drawn | Hard-drawn rod/section where strength and softening resistance at 200–300 °C matter most (commutators, contact-wire sections). | 280 | 320 | 8 | 100 HB | 98.5 % IACS |
extra hard / spring drawn wire | Heavily drawn wire and fine sections for windings and springs that must resist stress relaxation after soldering. | 340 | 380 | 3 | 68 HRB | 97.5 % IACS |
What is CuAg0.07(OF)?
CuAg0.07(OF) (CR018A) is a medium-silver oxygen-free copper rod grade supplied annealed (M) and in tempers R200 through R360. It is used where both hydrogen-embrittlement resistance and better thermal softening performance than plain oxygen-free copper are required; annealed properties are 70 MPa yield, 225 MPa tensile, 45 % elongation, 45 HB, 391 W/m·K and 100.5 % IACS, with service to 300 °C and a formability score of 97. Machining rates near 20 % of AISI 1212 and the weld heat-affected zone reverts to annealed strength. CuAg0.04(OF) is the lower-silver alternative for less demanding heat exposure. CuAg0.07(OF) has a density of 8.94 g/cm³ (0.323 lb/in³), heavier than 90% of copper alloy grades. It melts at 1,065°C (1,949 °F). CuAg0.07(OF) 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 120 GPa (17.4 Msi).
What is CuAg0.07(OF) used for?
- vacuum electronic components
- high-reliability brazed conductors
- aerospace electrical parts
Advantages
- Conducts heat well — 391 W/m·K (225.9 BTU/hr·ft·°F), better than 98% of copper alloy grades
- High electrical conductivity — 100.5 % IACS, better than 97% of copper alloy grades
- Forms and bends easily — 97/100, better than 97% of copper alloy grades
- Ductile — tolerates forming and impact — 45%, better than 91% of copper alloy grades
- High service temperature — 300°C (572 °F), better than 85% of copper alloy grades
Limitations
- Difficult to machine — 22/100, worse than 94% of copper alloy grades
- Low strength — 70 MPa (10.2 ksi), worse than 93% of copper alloy grades
CuAg0.07(OF) properties
Typical room-temperature values for CuAg0.07(OF)-R200; bars are the position among copper alloy grades.
Physical3
CuAg0.07(OF) has a density of 8.94 g/cm³ (0.323 lb/in³), heavier than 90% of copper alloy grades. It melts at 1,065°C (1,949 °F).
Mechanical12
CuAg0.07(OF) 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 120 GPa (17.4 Msi).
Thermal6
CuAg0.07(OF) is rated for continuous service to 300°C (572 °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
CuAg0.07(OF) conducts electricity at 100.5 % IACS, better than 97% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (58/100), worse than 76% of copper alloy grades.
Sustainability4
Producing a kilogram of CuAg0.07(OF) takes about 57 MJ of energy and emits 3.9 kg of CO₂ — less than 52% of copper alloy grades. Typical recycled content is 5%.
Manufacturability8
CuAg0.07(OF)'s machinability is poor (22/100, worse than 94% of copper alloy grades); weldability good (60/100); formability excellent (97/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the copper alloy family
Yield strength against density for every copper alloy grade FabDigit runs. CuAg0.07(OF) is highlighted; hover a dot for its name, or open the interactive family chart.
Working with CuAg0.07(OF)
Is CuAg0.07(OF) easy to machine?
Gummy and stringy like pure copper (≈20 % of AISI 1212) — use sharp positive-rake polished tools, high speed, generous feed and flood coolant; cold-worked tempers (R250/R290) chip much better than annealed.
Can CuAg0.07(OF) be welded?
Excellent for GTAW/EBW/laser and resistance welding with no hydrogen embrittlement risk, but the 390 W/m·K conductivity demands high heat input and 200–400 °C preheat on thick sections; the weld/HAZ reverts to annealed strength.
Can CuAg0.07(OF) be formed, bent or molded?
Outstanding cold formability in R200 — deep drawing, heading, bending to 0T; anneal at 400–600 °C between severe steps, and expect a higher recrystallisation temperature than Cu-ETP because of the silver.
CuAg0.07(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 raises softening/recrystallisation temperature ~100 °C | 0.06 – 0.08 | 0.07 |
| 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 | |
| CuCu + Ag ≥ 99.95 %, from Cu-CATH-1 grade cathode | ≥ 99.95 (balance) |
What surface finishes work on CuAg0.07(OF)?
Solders and brazes readily with mild fluxes; electroplate Ni/Ag/Sn for contacts, or passivate/lacquer bright-polished parts since bare copper tarnishes quickly in air.
Surface treatments FabDigit runs on copper alloy parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Equivalent designations
Standards and trade names that resolve to Copper Alloy CuAg0.07(OF) in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- CR018A
How much does CuAg0.07(OF) cost?
CuAg0.07(OF) is a high-cost copper alloy ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
CuAg0.07(OF) — frequently asked
What is CuAg0.07(OF) used for?
CuAg0.07(OF) is typically used for vacuum electronic components, high-reliability brazed conductors and aerospace electrical parts. In short: oxygen-free, hydrogen-embrittlement free; 100.5 % IACS rod grade; higher recrystallisation than Cu-ETP.
What is the yield strength of CuAg0.07(OF)?
CuAg0.07(OF) 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 7 listed tempers.
Is CuAg0.07(OF) easy to machine?
Not especially — machinability is rated poor (22/100, worse than 94% of copper alloy grades). Gummy and stringy like pure copper (≈20 % of AISI 1212) — use sharp positive-rake polished tools, high speed, generous feed and flood coolant; cold-worked tempers (R250/R290) chip much better than annealed.
Can CuAg0.07(OF) be welded?
Yes — weldability is rated good (60/100). Excellent for GTAW/EBW/laser and resistance welding with no hydrogen embrittlement risk, but the 390 W/m·K conductivity demands high heat input and 200–400 °C preheat on thick sections; the weld/HAZ reverts to annealed strength.
What surface finishes work on CuAg0.07(OF)?
Solders and brazes readily with mild fluxes; electroplate Ni/Ag/Sn for contacts, or passivate/lacquer bright-polished parts since bare copper tarnishes quickly in air.
Can CuAg0.07(OF) be formed, bent or molded?
Outstanding cold formability in R200 — deep drawing, heading, bending to 0T; anneal at 400–600 °C between severe steps, and expect a higher recrystallisation temperature than Cu-ETP because of the silver.
What is the maximum service temperature of CuAg0.07(OF)?
CuAg0.07(OF) is rated for continuous use to about 300°C (572 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between CuAg0.07(OF)-R200 and CuAg0.07(OF)-R360?
R200 is the default condition — choose for maximum ductility, deep drawing, bending and forming, and for maximum conductivity after brazing. R360: heavily drawn wire and fine sections for windings and springs that must resist stress relaxation after soldering. Yield strength is 70 MPa in R200 versus 340 MPa in R360.
How much does CuAg0.07(OF) cost?
CuAg0.07(OF) is a high-cost copper alloy ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- EN 1977 — Copper and copper alloys: copper drawing stock (wire rod) — CEN (2013)
- EN 13601 — Copper and copper alloys: copper rod, bar and wire for general electrical purposes — CEN (2021)
- ASTM B152/B187 and CDA alloy sheet C10700 (silver-bearing oxygen-free copper) — ASTM / Copper Development Association (2019)
- ASM Handbook Vol.2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- ASM Handbook Vol.13B — Corrosion: Materials (copper alloys) — ASM International (2005)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.