Copper Alloy Cu-DHP
UNS C12200 · EN CW024A · GB TP2
Phosphorus-deoxidized copper with residual phosphorus content, the most widely used copper tube/sheet grade for plumbing, refrigeration and brazed piping due to excellent formability and brazeability.
Reference datasheet — Cu-DHP 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 H58 condition
Cu-DHP tempers and conditions
Cu-DHP is supplied in 9 conditions, soft to hard. H58 is the default FabDigit quotes; the values on this page are for it.
Compare all 9 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Soft annealed | Pick for refrigeration/ACR coils, LP gas and instrument tubing that must be hand-bent or expanded. | 65 | 230 | 45 | 40 HB | 85 % IACS |
Light annealed | Pick when full softness is not needed but easy bending is: slightly stiffer than O60 coil tube. | 90 | 240 | 40 | 45 HB | 85 % IACS |
Light drawn | Pick when tube must be machine-bent yet hold shape — common for medical gas and half-hard straight lengths. | 180 | 255 | 30 | 60 HB | 83 % IACS |
Quarter hard | Pick for deep-drawn or heavily formed sheet parts that need slightly more stiffness than annealed. | 190 | 250 | 25 | 60 HB | 83 % IACS |
H58Default Drawn, general purpose | Default stock condition: straight-length water, HVAC and brazed process tube where rigidity and pressure rating matter. | 220 | 275 | 20 | 70 HB | 82 % IACS |
Half hard | Pick as general-purpose sheet temper for roofing, gaskets, bus straps and moderately formed panels. | 250 | 290 | 14 | 80 HB | 82 % IACS |
Full hard | Pick for flat parts needing stiffness and flatness with only mild bending, e.g. clamps and terminals. | 300 | 330 | 8 | 90 HB | 81 % IACS |
Hard drawn | Pick for maximum strength and pressure rating in small-diameter tube or drawn rod, accepting low ductility. | 340 | 380 | 8 | 95 HB | 81 % IACS |
Spring hard | Pick for flat springs, contact fingers and gaskets needing maximum as-rolled strength; expect very low bend ductility. | 340 | 370 | 4 | 100 HB | 80 % IACS |
What is Cu-DHP?
Phosphorus-deoxidized copper with residual phosphorus content, the most widely used copper tube/sheet grade for plumbing, refrigeration and brazed piping due to excellent formability and brazeability. Cu-DHP 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). Cu-DHP has a yield strength of 220 MPa (31.9 ksi) and a tensile strength of 275 MPa (39.9 ksi) — weaker than 51% of copper alloy grades. Elongation at break is 20% and the elastic modulus is 117 GPa (17 Msi).
What is Cu-DHP used for?
- plumbing tube
- refrigeration/AC piping
- brazed pipe fittings
- roofing sheet
Advantages
- Conducts heat well — 339 W/m·K (195.9 BTU/hr·ft·°F), better than 86% of copper alloy grades
- High electrical conductivity — 82 % IACS, better than 85% of copper alloy grades
- Readily welded — 70/100, better than 85% of copper alloy grades
- Forms and bends easily — 85/100, better than 85% of copper alloy grades
Limitations
- Limited service temperature — 150°C (302 °F), worse than 96% of copper alloy grades
- Difficult to machine — 25/100, worse than 86% of copper alloy grades
Cu-DHP properties
Typical room-temperature values for Cu-DHP-H58; bars are the position among copper alloy grades.
Physical3
Cu-DHP 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-DHP has a yield strength of 220 MPa (31.9 ksi) and a tensile strength of 275 MPa (39.9 ksi) — weaker than 51% of copper alloy grades. Elongation at break is 20% and the elastic modulus is 117 GPa (17 Msi).
Thermal6
Cu-DHP is rated for continuous service to 150°C (302 °F). It conducts heat at 339 W/m·K (195.9 BTU/hr·ft·°F), better than 86% of copper alloy grades. Thermal expansion is 17.6 µm/m·K (9.78 µin/in·°F).
Electrical3
Cu-DHP conducts electricity at 82 % IACS, better than 85% 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 Cu-DHP takes about 57 MJ of energy and emits 3.6 kg of CO₂ — less than 52% of copper alloy grades. Typical recycled content is 35%.
Manufacturability7
Cu-DHP's machinability is poor (25/100, worse than 86% of copper alloy grades); weldability very good (70/100); formability excellent (85/100).
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. Cu-DHP is highlighted; hover a dot for its name, or open the interactive family chart.
Working with Cu-DHP
Is Cu-DHP easy to machine?
Gummy and low-rated (~20 % of AISI 1212): use sharp positive-rake tools, high speed, generous soluble-oil coolant, and prefer cold-worked temper over annealed to avoid smearing.
Can Cu-DHP be welded?
Free of hydrogen embrittlement thanks to P deoxidation — GTAW/oxy-fuel and especially capillary brazing with BCuP filler work well; preheat 200–400 °C on heavy sections to counter high thermal conductivity.
Can Cu-DHP be formed, bent or molded?
Excellent cold formability in O temper (bending, expanding, flaring, deep drawing); interstage anneal at 400–600 °C after heavy reductions, and note hard tempers soften above ~200 °C.
Cu-DHP 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 deoxidizer; raises softening resistance, lowers conductivity | 0.02 – 0.04 | 0.03 |
| CuCu incl. Ag ≥ 99.90 % (ASTM B75/B88 C12200, EN Cu-DHP CW024A, GB/T TP2) | ≥ 99.9 (balance) |
What surface finishes work on Cu-DHP?
Not anodizable; finish by mechanical polishing, chemical brightening, tin/nickel/chrome plating, or clear lacquer to delay tarnish and patina.
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 Cu-DHP in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
How much does Cu-DHP cost?
Cu-DHP 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.
Cu-DHP — frequently asked
What is Cu-DHP used for?
Cu-DHP is typically used for plumbing tube, refrigeration/AC piping, brazed pipe fittings and roofing sheet. In short: most-used copper tube grade; brazes without hydrogen embrittlement; lower conductivity than ETP.
What is the yield strength of Cu-DHP?
Cu-DHP has a typical yield strength of 220 MPa (31.9 ksi) and a tensile strength of 275 MPa (39.9 ksi) — weaker than 51% of copper alloy grades. Strength varies by condition: see the 9 listed tempers.
Is Cu-DHP easy to machine?
Not especially — machinability is rated poor (25/100, worse than 86% of copper alloy grades). Gummy and low-rated (~20 % of AISI 1212): use sharp positive-rake tools, high speed, generous soluble-oil coolant, and prefer cold-worked temper over annealed to avoid smearing.
Can Cu-DHP be welded?
Yes — weldability is rated very good (70/100). Free of hydrogen embrittlement thanks to P deoxidation — GTAW/oxy-fuel and especially capillary brazing with BCuP filler work well; preheat 200–400 °C on heavy sections to counter high thermal conductivity.
What surface finishes work on Cu-DHP?
Not anodizable; finish by mechanical polishing, chemical brightening, tin/nickel/chrome plating, or clear lacquer to delay tarnish and patina.
Can Cu-DHP be formed, bent or molded?
Excellent cold formability in O temper (bending, expanding, flaring, deep drawing); interstage anneal at 400–600 °C after heavy reductions, and note hard tempers soften above ~200 °C.
What is the maximum service temperature of Cu-DHP?
Cu-DHP 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-DHP-H58 and Cu-DHP-O60?
H58 is the default condition — default stock condition: straight-length water, HVAC and brazed process tube where rigidity and pressure rating matter. O60: pick for refrigeration/ACR coils, LP gas and instrument tubing that must be hand-bent or expanded. Yield strength is 220 MPa in H58 versus 65 MPa in O60.
How much does Cu-DHP cost?
Cu-DHP 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
- ASTM B88 / B75 / B280 — seamless copper water, tube and ACR tube — ASTM (2022)
- EN 1057 — Copper and copper alloys, seamless round tubes for water and gas — CEN (2010)
- EN 1652 / EN 13348 (Cu-DHP CW024A) — CEN (2019)
- GB/T 18033 / GB/T 1527 — TP2 — SAC (2017)
- C12200 alloy datasheet — Copper Development Association (copper.org) (2023)
- ASM Handbook Vol.2 — Properties of Nonferrous Alloys — ASM International (1990)
- Copper tube and strip property sheets — KME / Wieland / Mueller (2023)
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.