Copper Alloy Cu-DHP-H08
Supply condition
UNS C12200 · EN CW024A · GB TP2
H08 = spring hard
Pick for flat springs, contact fingers and gaskets needing maximum as-rolled strength; expect very low bend ductility.
Values for the H08 condition
Other Cu-DHP tempers and conditions
Cu-DHP is listed in 9 conditions; see the grade overview at Cu-DHP.
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 |
H08This page 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-H08?
Cu-DHP-H08 is Cu-DHP supplied in the H08 condition — pick for flat springs, contact fingers and gaskets needing maximum as-rolled strength; expect very low bend ductility. Cu-DHP-H08 has a yield strength of 340 MPa (49.3 ksi) and a tensile strength of 370 MPa (53.7 ksi) — stronger than 71% of copper alloy grades. Elongation at break is 4% and the elastic modulus is 117 GPa (17 Msi). Cu-DHP-H08 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). H58 is the default condition FabDigit quotes; H08 is available on request or by drawing note.
Advantages
- Conducts heat well — 331 W/m·K (191.2 BTU/hr·ft·°F), better than 85% of copper alloy grades
- High electrical conductivity — 80 % IACS, better than 84% of copper alloy grades
- Readily welded — 60/100, better than 76% of copper alloy grades
Limitations
- Limited service temperature — 100°C (212 °F), worse than 100% of copper alloy grades
- Limited ductility — 4%, worse than 96% of copper alloy grades
Cu-DHP-H08 properties
Typical room-temperature values for Cu-DHP-H08; 19 are specific to this condition. Other listed values are Cu-DHP reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
Cu-DHP-H08 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-H08 has a yield strength of 340 MPa (49.3 ksi) and a tensile strength of 370 MPa (53.7 ksi) — stronger than 71% of copper alloy grades. Elongation at break is 4% and the elastic modulus is 117 GPa (17 Msi).
Thermal6
Cu-DHP-H08 is rated for continuous service to 100°C (212 °F). It conducts heat at 331 W/m·K (191.2 BTU/hr·ft·°F), better than 85% of copper alloy grades. Thermal expansion is 17.6 µm/m·K (9.78 µin/in·°F).
Electrical3
Cu-DHP-H08 conducts electricity at 80 % IACS, better than 84% 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-H08 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-H08's machinability is fair (35/100, better than 51% of copper alloy grades); weldability good (60/100); formability fair (45/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with Cu-DHP-H08
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.
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.
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) | — |
Cu-DHP-H08 — frequently asked
What is Cu-DHP-H08 used for?
Cu-DHP-H08 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-H08?
Cu-DHP-H08 has a typical yield strength of 340 MPa (49.3 ksi) and a tensile strength of 370 MPa (53.7 ksi) — stronger than 71% of copper alloy grades. Strength varies by condition: see the 9 listed tempers.
Is Cu-DHP-H08 easy to machine?
Not especially — machinability is rated fair (35/100, better than 51% 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-H08 be welded?
Yes — weldability is rated good (60/100). 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-H08?
Not anodizable; finish by mechanical polishing, chemical brightening, tin/nickel/chrome plating, or clear lacquer to delay tarnish and patina.
Can Cu-DHP-H08 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-H08?
Cu-DHP-H08 is rated for continuous use to about 100°C (212 °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.
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. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.