Copper Alloy CuAg0.04(OF)
EN CuAg0.04(OF)
CuAg0.04(OF) (CR017A) is an oxygen-free copper with a 0.04 % silver addition, offered annealed (M) and in R200 to R360 tempers.
Reference datasheet — CuAg0.04(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
CuAg0.04(OF) tempers and conditions
CuAg0.04(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 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 |
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)?
CuAg0.04(OF) (CR017A) is an oxygen-free copper with a 0.04 % silver addition, offered annealed (M) and in R200 to R360 tempers. It combines freedom from hydrogen embrittlement with better resistance to thermal softening than plain oxygen-free copper, which suits electronic and vacuum-brazed rod work; the annealed condition gives 70 MPa yield, 225 MPa tensile, 45 % elongation, 45 HB, 391 W/m·K and 101 % IACS, with service to 300 °C and a formability score of 98. Weldability rates 70 and machining productivity is poor. Step up to CuAg0.10(OF) when softening resistance to 350 °C is required. CuAg0.04(OF) 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). CuAg0.04(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 118 GPa (17.1 Msi).
What is CuAg0.04(OF) used for?
- electronic lead-frame stock
- vacuum-brazed assemblies
- high-temperature electronic conductors
Advantages
- Forms and bends easily — 98/100, better than 99% of copper alloy grades
- 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
- 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
- Low strength — 70 MPa (10.2 ksi), worse than 93% of copper alloy grades
- Difficult to machine — 25/100, worse than 86% of copper alloy grades
CuAg0.04(OF) properties
Typical room-temperature values for CuAg0.04(OF)-R200; bars are the position among copper alloy grades.
Physical3
CuAg0.04(OF) 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) 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 118 GPa (17.1 Msi).
Thermal6
CuAg0.04(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
CuAg0.04(OF) conducts electricity at 101 % IACS, better than 98% 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) 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)'s machinability is poor (25/100, worse than 86% of copper alloy grades); weldability very good (70/100); formability excellent (98/100).
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. CuAg0.04(OF) is highlighted; hover a dot for its name, or open the interactive family chart.
Working with CuAg0.04(OF)
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.
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 |
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.
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 CuAg0.04(OF) in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- CR017A
How much does CuAg0.04(OF) cost?
CuAg0.04(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.
CuAg0.04(OF) — frequently asked
What is CuAg0.04(OF) used for?
CuAg0.04(OF) 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)?
CuAg0.04(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 CuAg0.04(OF) easy to machine?
Not especially — machinability is rated poor (25/100, worse than 86% 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) be welded?
Yes — weldability is rated very good (70/100). 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)?
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) 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)?
CuAg0.04(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 CuAg0.04(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.
How much does CuAg0.04(OF) cost?
CuAg0.04(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 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; 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.