Copper Alloy Cu-DLP-R290
Supply condition
UNS C12000 · EN CW023A
R290 = hard, Rm ≥ 290 MPa
Hard-drawn tube/sheet for rigid pressure lines, busbar-type stiffness and press-fit parts; little further forming possible.
Values for the R290 condition
Other Cu-DLP tempers and conditions
Cu-DLP is listed in 12 conditions; see the grade overview at Cu-DLP.
Compare all 12 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Thermomechanically controlled processed | Hot-worked/extruded stock supplied without a guaranteed strength level; for re-drawing, forging or remelt-free stock. | 70 | 215 | 45 | 45 HB | 93 % IACS |
Annealed (soft), Rm ≥ 200 MPa | Fully soft strip/sheet for deep drawing, spinning and tight bending where maximum ductility is needed. | 70 | 220 | 48 | 45 HB | 93 % IACS |
Hardness-specified soft temper, 40–65 HV | Ordered to a Vickers hardness band instead of tensile strength; soft equivalent of R200 for pressing/drawing lines. | 70 | 220 | 45 | 47 HB | 92 % IACS |
R220Default Annealed / soft, Rm ≥ 220 MPa | Standard soft condition for heat-exchanger and plumbing tube and general sheet — bends and expands easily and brazes without embrittlement. | 100 | 235 | 42 | 52 HB | 92 % IACS |
Hardness-specified temper, 55–80 HV | Hardness-controlled equivalent of R220 for tube and strip bought on hardness specification. | 110 | 240 | 38 | 62 HB | 92 % IACS |
Half hard tube, Rm ≥ 250 MPa | Half-hard drawn tube for pressure lines that must still take moderate bending on site. | 190 | 275 | 30 | 85 HB | 91 % IACS |
Quarter hard, Rm ≥ 240 MPa | Lightly cold-worked strip/sheet balancing modest strength with retained bending ability. | 200 | 265 | 14 | 80 HB | 91 % IACS |
Hardness-specified temper, 75–100 HV | Quarter/half-hard hardness band matching R240–R250 for stamped and formed components. | 200 | 270 | 14 | 84 HB | 91 % IACS |
R290This page Hard, Rm ≥ 290 MPa | Hard-drawn tube/sheet for rigid pressure lines, busbar-type stiffness and press-fit parts; little further forming possible. | 280 | 320 | 6 | 95 HB | 90 % IACS |
Hardness-specified hard temper, 90–110 HV | Hard hardness band equivalent to R290 where the customer's incoming check is a hardness test. | 280 | 320 | 6 | 95 HB | 90 % IACS |
Extra hard / hard drawn, Rm ≥ 360 MPa | Highest cold-worked strength level for thin strip and small-diameter drawn tube/rod where stiffness and wear resistance dominate. | 340 | 380 | 4 | 110 HB | 89 % IACS |
Hardness-specified extra-hard temper, ≥110 HV | Extra-hard hardness band corresponding to R360 strip and drawn wire/rod. | 340 | 380 | 4 | 110 HB | 89 % IACS |
What is Cu-DLP-R290?
Cu-DLP-R290 is Cu-DLP supplied in the R290 condition — hard-drawn tube/sheet for rigid pressure lines, busbar-type stiffness and press-fit parts; little further forming possible. Cu-DLP-R290 has a yield strength of 280 MPa (40.6 ksi) and a tensile strength of 320 MPa (46.4 ksi) — stronger than 59% of copper alloy grades. Elongation at break is 6% and the elastic modulus is 117 GPa (17 Msi). Cu-DLP-R290 has a density of 8.94 g/cm³ (0.323 lb/in³), heavier than 90% of copper alloy grades. It melts at 1,083°C (1,981 °F). R220 is the default condition FabDigit quotes; R290 is available on request or by drawing note.
Advantages
- Polishes to a fine finish — 85/100, better than 92% of copper alloy grades
- High electrical conductivity — 90 % IACS, better than 87% of copper alloy grades
- Conducts heat well — 340 W/m·K (196.4 BTU/hr·ft·°F), better than 86% of copper alloy grades
- Readily welded — 70/100, better than 85% of copper alloy grades
Limitations
- Limited service temperature — 150°C (302 °F), worse than 96% of copper alloy grades
- Limited ductility — 6%, worse than 89% of copper alloy grades
Cu-DLP-R290 properties
Typical room-temperature values for Cu-DLP-R290; 13 are specific to this condition. Other listed values are Cu-DLP reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
Cu-DLP-R290 has a density of 8.94 g/cm³ (0.323 lb/in³), heavier than 90% of copper alloy grades. It melts at 1,083°C (1,981 °F).
Mechanical11
Cu-DLP-R290 has a yield strength of 280 MPa (40.6 ksi) and a tensile strength of 320 MPa (46.4 ksi) — stronger than 59% of copper alloy grades. Elongation at break is 6% and the elastic modulus is 117 GPa (17 Msi).
Thermal6
Cu-DLP-R290 is rated for continuous service to 150°C (302 °F). It conducts heat at 340 W/m·K (196.4 BTU/hr·ft·°F), better than 86% of copper alloy grades. Thermal expansion is 17.7 µm/m·K (9.83 µin/in·°F).
Electrical3
Cu-DLP-R290 conducts electricity at 90 % IACS, better than 87% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (62/100), worse than 57% of copper alloy grades.
Sustainability4
Producing a kilogram of Cu-DLP-R290 takes about 55 MJ of energy and emits 3.6 kg of CO₂ — less than 72% of copper alloy grades. Typical recycled content is 35%.
Manufacturability8
Cu-DLP-R290's machinability is fair (45/100, better than 64% of copper alloy grades); weldability very good (70/100); formability fair (45/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with Cu-DLP-R290
Is Cu-DLP easy to machine?
Gummy and low-rated (~20 % of AISI 1212): use sharp high-rake tools, high speed, generous cutting fluid, and avoid dwell to prevent built-up edge.
Can Cu-DLP be welded?
Readily TIG/MIG welded with Cu-Si or deoxidised Cu filler; large preheat needed because of the high thermal conductivity — low P content means no hydrogen embrittlement risk on brazing.
Can Cu-DLP be formed, bent or molded?
Excellent cold formability in R200/R220 — deep drawing, spinning, tube expansion and tight bends; interanneal at 400–600 °C after heavy reductions.
What surface finishes work on Cu-DLP?
Not anodisable; polishes to a bright finish and is easily tin, nickel or silver plated — protect with lacquer or benzotriazole to delay tarnishing.
Cu-DLP 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 |
|---|---|---|
| Presidual deoxidising phosphorus — low band gives the high conductivity vs Cu-DHP | 0.01 | 0.01 |
| Agcounted as copper | — | — |
| Bi | ≤ 5×10⁻⁴ | — |
| Pb | ≤ 0.01 | — |
| CuCu + Ag ≥ 99.90 % including P (EN 1976 / EN 13599 family) | ≥ 99.9 (balance) | — |
Cu-DLP-R290 — frequently asked
What is Cu-DLP-R290 used for?
Cu-DLP-R290 is typically used for refrigeration tubing, heat exchanger tube, electrical conductors and brazed assemblies. In short: higher conductivity than Cu-DHP; brazeable without hydrogen embrittlement; excellent cold formability.
What is the yield strength of Cu-DLP-R290?
Cu-DLP-R290 has a typical yield strength of 280 MPa (40.6 ksi) and a tensile strength of 320 MPa (46.4 ksi) — stronger than 59% of copper alloy grades. Strength varies by condition: see the 12 listed tempers.
Is Cu-DLP-R290 easy to machine?
Reasonably — machinability is rated fair (45/100, better than 64% of copper alloy grades). Gummy and low-rated (~20 % of AISI 1212): use sharp high-rake tools, high speed, generous cutting fluid, and avoid dwell to prevent built-up edge.
Can Cu-DLP-R290 be welded?
Yes — weldability is rated very good (70/100). Readily TIG/MIG welded with Cu-Si or deoxidised Cu filler; large preheat needed because of the high thermal conductivity — low P content means no hydrogen embrittlement risk on brazing.
What surface finishes work on Cu-DLP-R290?
Not anodisable; polishes to a bright finish and is easily tin, nickel or silver plated — protect with lacquer or benzotriazole to delay tarnishing.
Can Cu-DLP-R290 be formed, bent or molded?
Excellent cold formability in R200/R220 — deep drawing, spinning, tube expansion and tight bends; interanneal at 400–600 °C after heavy reductions.
What is the maximum service temperature of Cu-DLP-R290?
Cu-DLP-R290 is rated for continuous use to about 150°C (302 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between Cu-DLP-R220 and Cu-DLP-R360?
R220 is the default condition — standard soft condition for heat-exchanger and plumbing tube and general sheet — bends and expands easily and brazes without embrittlement. R360: highest cold-worked strength level for thin strip and small-diameter drawn tube/rod where stiffness and wear resistance dominate. Yield strength is 100 MPa in R220 versus 340 MPa in R360.
Sources
- EN 1652 — Copper and copper alloys: plate, sheet, strip and circles for general purposes — CEN (1997)
- EN 1057 — Seamless round copper tubes for water and gas — CEN (2010)
- EN 13601 — Copper rod, bar and wire for general electrical purposes — CEN (2021)
- EN 1976 — Cast unwrought copper products (Cu-DLP designation CW023A) — CEN (2012)
- GB/T 5231 — (TP1 equivalent) — SAC (2022)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- CDA / copper.org alloy data for phosphorus-deoxidised coppers (C12000) — Copper Development Association (2023)
- Wieland / KME Cu-DLP (CW023A) product data — Wieland-Werke AG; KME (2022)
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.