Copper Alloy CuAg0.10P-R290
Supply condition
EN CuAg0.10P
Pick for commutator bars, rotor bars and welding fixtures where hard-drawn strength plus resistance to softening during brazing is required.
Values for the R290 condition
Other CuAg0.10P tempers and conditions
CuAg0.10P is listed in 6 conditions; see the grade overview at CuAg0.10P.
Compare all 6 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Thermomechanically controlled processed | Pick for the cast feedstock form supplied to rolling/extrusion mills, not for finished parts. | 60 | 200 | 40 | 42 HB | 100 % IACS |
annealed / soft, ≥200 MPa tensile | Pick when maximum conductivity, bendability and deep-forming ductility matter more than strength. | 75 | 225 | 45 | 45 HB | 100 % IACS |
R240Default half hard, ≥240 MPa tensile | Default stock condition for rod, bar and profile: balanced strength, machinability and enough ductility for moderate bending. | 200 | 265 | 25 | 68 HB | 99 % IACS |
drawn, ≥250 MPa tensile | Pick for drawn rod/profile needing slightly higher proof stress than R240 with usable ductility. | 220 | 275 | 18 | 78 HB | 98 % IACS |
R290This page ≥290 MPa tensile | Pick for commutator bars, rotor bars and welding fixtures where hard-drawn strength plus resistance to softening during brazing is required. | 285 | 320 | 9 | 98 HB | 97 % IACS |
≥360 MPa tensile | Pick for heavily drawn wire and thin profiles needing maximum tensile strength and spring-back. | 350 | 385 | 3 | 112 HB | 96 % IACS |
What is CuAg0.10P-R290?
CuAg0.10P-R290 is CuAg0.10P supplied in the R290 condition — pick for commutator bars, rotor bars and welding fixtures where hard-drawn strength plus resistance to softening during brazing is required. CuAg0.10P-R290 has a yield strength of 285 MPa (41.3 ksi) and a tensile strength of 320 MPa (46.4 ksi) — stronger than 60% of copper alloy grades. Elongation at break is 9% and the elastic modulus is 120 GPa (17.4 Msi). CuAg0.10P-R290 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). R240 is the default condition FabDigit quotes; R290 is available on request or by drawing note.
Advantages
- Readily welded — 85/100, better than 95% of copper alloy grades
- High electrical conductivity — 97 % IACS, better than 92% of copper alloy grades
- Conducts heat well — 380 W/m·K (219.6 BTU/hr·ft·°F), better than 91% of copper alloy grades
Limitations
- Limited ductility — 9%, worse than 79% of copper alloy grades
CuAg0.10P-R290 properties
Typical room-temperature values for CuAg0.10P-R290; 15 are specific to this condition. Other listed values are CuAg0.10P reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
CuAg0.10P-R290 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
CuAg0.10P-R290 has a yield strength of 285 MPa (41.3 ksi) and a tensile strength of 320 MPa (46.4 ksi) — stronger than 60% of copper alloy grades. Elongation at break is 9% and the elastic modulus is 120 GPa (17.4 Msi).
Thermal6
CuAg0.10P-R290 is rated for continuous service to 250°C (482 °F). It conducts heat at 380 W/m·K (219.6 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
CuAg0.10P-R290 conducts electricity at 97 % IACS, better than 92% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (58/100), worse than 76% of copper alloy grades.
Sustainability4
Producing a kilogram of CuAg0.10P-R290 takes about 58 MJ of energy and emits 3.8 kg of CO₂ — more than 61% of copper alloy grades. Typical recycled content is 25%.
Manufacturability8
CuAg0.10P-R290's machinability is poor (30/100, worse than 67% of copper alloy grades); weldability excellent (85/100); formability fair (45/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with CuAg0.10P-R290
Is CuAg0.10P easy to machine?
Gummy and low-rated (~20 % of AISI 1212): use sharp positive-rake polished tools, high speed, low feed and generous soluble-oil coolant to avoid built-up edge.
Can CuAg0.10P be welded?
Excellent for GTAW/GMAW, resistance and induction welding — low residual P means no hydrogen embrittlement; preheat 150–400 °C on thick sections because of high heat conduction.
Can CuAg0.10P be formed, bent or molded?
Very ductile in R200; cold heads, bends and deep-draws readily, with interstage anneals at 400–550 °C (silver keeps annealing needs above plain copper).
What surface finishes work on CuAg0.10P?
Not anodisable; solders and brazes exceptionally well, takes electroplated tin/silver/nickel readily, and polishes to a bright finish that requires lacquer or passivation to stop tarnish.
CuAg0.10P 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 | 0.08 – 0.12 | 0.1 |
| Plow-residual phosphorus deoxidation (DLP-type) | 0 – 0.01 | 0 |
| Oresidual after deoxidation | ≤ 0 | — |
| Bi | ≤ 5×10⁻⁴ | — |
| Pb | ≤ 0.01 | — |
| CuCu + Ag ≥ 99.90 % (excluding P) | balance | — |
CuAg0.10P-R290 — frequently asked
What is CuAg0.10P-R290 used for?
CuAg0.10P-R290 is typically used for high-temperature brazed conductors, welded busbar assemblies and commutator risers. In short: best weldability of the series; highest-silver deoxidized copper; 99 % IACS after brazing.
What is the yield strength of CuAg0.10P-R290?
CuAg0.10P-R290 has a typical yield strength of 285 MPa (41.3 ksi) and a tensile strength of 320 MPa (46.4 ksi) — stronger than 60% of copper alloy grades. Strength varies by condition: see the 6 listed tempers.
Is CuAg0.10P-R290 easy to machine?
Not especially — machinability is rated poor (30/100, worse than 67% of copper alloy grades). Gummy and low-rated (~20 % of AISI 1212): use sharp positive-rake polished tools, high speed, low feed and generous soluble-oil coolant to avoid built-up edge.
Can CuAg0.10P-R290 be welded?
Yes — weldability is rated excellent (85/100). Excellent for GTAW/GMAW, resistance and induction welding — low residual P means no hydrogen embrittlement; preheat 150–400 °C on thick sections because of high heat conduction.
What surface finishes work on CuAg0.10P-R290?
Not anodisable; solders and brazes exceptionally well, takes electroplated tin/silver/nickel readily, and polishes to a bright finish that requires lacquer or passivation to stop tarnish.
Can CuAg0.10P-R290 be formed, bent or molded?
Very ductile in R200; cold heads, bends and deep-draws readily, with interstage anneals at 400–550 °C (silver keeps annealing needs above plain copper).
What is the maximum service temperature of CuAg0.10P-R290?
CuAg0.10P-R290 is rated for continuous use to about 250°C (482 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between CuAg0.10P-R240 and CuAg0.10P-R360?
R240 is the default condition — default stock condition for rod, bar and profile: balanced strength, machinability and enough ductility for moderate bending. R360: pick for heavily drawn wire and thin profiles needing maximum tensile strength and spring-back. Yield strength is 200 MPa in R240 versus 350 MPa in R360.
Sources
- EN 13601 — Copper and copper alloys: rod, bar and wire for electrical purposes — CEN (2021)
- EN 1976 / EN 1978 — Cast unwrought copper products (CR designations) — CEN (2012)
- EN 1412 — Copper and copper alloys: European numbering system — CEN (2016)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- Copper Development Association alloy datasheets (silver-bearing / DLP coppers) — CDA (copper.org) (2023)
- (SMM) / copper price quotations — SMM (2026)
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.