Copper Alloy C72200-H02
Supply condition
UNS C72200
H02 = half hard
General-purpose cold-rolled temper for sheet parts, ferrules and fittings needing higher yield with some bend capability.
Values for the H02 condition
Other C72200 tempers and conditions
C72200 is listed in 8 conditions; see the grade overview at C72200.
Compare all 8 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
As hot rolled | Mill hot-worked plate, bar or extruded tube shell; lowest strength, used where further forming or full annealing follows. | 140 | 360 | 35 | 74 HB | — |
O61Default Annealed | Standard condition for seawater condenser and heat-exchanger tube, tube-sheet cladding and deep-drawn parts; maximum ductility and best corrosion behaviour. | 150 | 385 | 40 | 78 HB | 5.5 % IACS |
Light drawn | Lightly drawn tube temper giving straighter, stiffer condenser tubing than annealed while keeping enough ductility for roller expansion into tube sheets. | 275 | 415 | 25 | 100 HB | — |
Quarter hard | Mild cold-worked strip/sheet when moderate stiffness is needed but forming and bending are still required. | 340 | 450 | 20 | 115 HB | — |
H02This page Half hard | General-purpose cold-rolled temper for sheet parts, ferrules and fittings needing higher yield with some bend capability. | 415 | 495 | 12 | 140 HB | — |
Full hard | High-strength flat product or drawn rod/tube for pressure and structural marine parts where forming is limited to gentle bends. | 500 | 550 | 8 | 160 HB | — |
Extra hard | Heavily cold-worked strip for flat springs, clips and wear surfaces where only very light forming is done. | 540 | 585 | 5 | 175 HB | — |
Spring hard | Maximum cold-worked strength for corrosion-resistant springs, diaphragms and contacts in marine or chemical atmospheres. | 570 | 620 | 4 | 190 HB | — |
What is C72200-H02?
C72200-H02 is C72200 supplied in the H02 condition — general-purpose cold-rolled temper for sheet parts, ferrules and fittings needing higher yield with some bend capability. C72200-H02 has a yield strength of 415 MPa (60.2 ksi) and a tensile strength of 495 MPa (71.8 ksi) — stronger than 82% of copper alloy grades. Elongation at break is 12% and the elastic modulus is 145 GPa (21 Msi). C72200-H02 has a density of 8.94 g/cm³ (0.323 lb/in³), heavier than 90% of copper alloy grades. It melts at 1,130°C (2,066 °F). O61 is the default condition FabDigit quotes; H02 is available on request or by drawing note.
Advantages
- Good corrosion resistance — 82/100, better than 98% of copper alloy grades
- Stiff — 145 GPa (21 Msi), better than 97% of copper alloy grades
- Readily welded — 80/100, better than 93% of copper alloy grades
- High strength — 415 MPa (60.2 ksi), better than 82% of copper alloy grades
Limitations
- Low electrical conductivity — 5.5 % IACS, worse than 95% of copper alloy grades
- High embodied carbon — 6.2 kg CO₂/kg, worse than 93% of copper alloy grades
- Poor heat conductor — 34 W/m·K (19.6 BTU/hr·ft·°F), worse than 88% of copper alloy grades
C72200-H02 properties
Typical room-temperature values for C72200-H02; 10 are specific to this condition. Other listed values are C72200 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C72200-H02 has a density of 8.94 g/cm³ (0.323 lb/in³), heavier than 90% of copper alloy grades. It melts at 1,130°C (2,066 °F).
Mechanical14
C72200-H02 has a yield strength of 415 MPa (60.2 ksi) and a tensile strength of 495 MPa (71.8 ksi) — stronger than 82% of copper alloy grades. Elongation at break is 12% and the elastic modulus is 145 GPa (21 Msi).
Thermal6
C72200-H02 is rated for continuous service to 250°C (482 °F). It conducts heat at 34 W/m·K (19.6 BTU/hr·ft·°F), worse than 88% of copper alloy grades. Thermal expansion is 15.7 µm/m·K (8.72 µin/in·°F).
Electrical3
C72200-H02 conducts electricity at 5.5 % IACS, worse than 95% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is very good (82/100), better than 98% of copper alloy grades.
Sustainability4
Producing a kilogram of C72200-H02 takes about 92 MJ of energy and emits 6.2 kg of CO₂ — more than 94% of copper alloy grades. Typical recycled content is 30%.
Manufacturability7
C72200-H02's machinability is fair (35/100, better than 51% of copper alloy grades); weldability very good (80/100); formability fair (45/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C72200-H02
Is C72200 easy to machine?
Gummy and work-hardening like all Cu-Ni: rating ≈20 % of AISI 1212 — use sharp positive-rake carbide, heavy positive feed, low-to-moderate speed and flood coolant to avoid rubbing.
Can C72200 be welded?
Readily GTAW/GMAW welded with 70/30 Cu-Ni (ERCuNi) filler; keep interpass low, no preheat, avoid sulphur/lead/oil contamination and use full penetration to prevent crevices.
Can C72200 be formed, bent or molded?
Excellent cold formability in O61 (deep drawing, tube bending, roller expansion); interanneal near 700–800 °C, hot work 850–1000 °C, and never hot work in sulphur-bearing atmospheres.
What surface finishes work on C72200?
Not anodisable; pickle in sulphuric/hydrogen-peroxide type baths, then leave bare for seawater (protective oxide film) or apply tin, nickel or silver plating for electrical/joining surfaces.
C72200 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 |
|---|---|---|
| NiNi + Co | 15 – 18 | 16.5 |
| Crkey addition for impingement resistance | 0.3 – 0.7 | 0.5 |
| Fe | 0.5 – 1 | 0.7 |
| Mn | ≤ 1 | 0.5 |
| Si | ≤ 0.15 | — |
| Ti | ≤ 0.03 | — |
| Zn | ≤ 0.5 | — |
| C | ≤ 0.05 | — |
| S | ≤ 0.02 | — |
| P | ≤ 0.02 | — |
| Pb | ≤ 0.05 | — |
| Curemainder, ~81–84 % | balance | — |
C72200-H02 — frequently asked
What is C72200-H02 used for?
C72200-H02 is typically used for seawater piping, power plant condenser tubes and high-velocity flow components. In short: chromium-strengthened 90/10 Cu-Ni; high-velocity seawater grade; stronger than C70600.
What is the yield strength of C72200-H02?
C72200-H02 has a typical yield strength of 415 MPa (60.2 ksi) and a tensile strength of 495 MPa (71.8 ksi) — stronger than 82% of copper alloy grades. Strength varies by condition: see the 8 listed tempers.
Is C72200-H02 easy to machine?
Not especially — machinability is rated fair (35/100, better than 51% of copper alloy grades). Gummy and work-hardening like all Cu-Ni: rating ≈20 % of AISI 1212 — use sharp positive-rake carbide, heavy positive feed, low-to-moderate speed and flood coolant to avoid rubbing.
Can C72200-H02 be welded?
Yes — weldability is rated very good (80/100). Readily GTAW/GMAW welded with 70/30 Cu-Ni (ERCuNi) filler; keep interpass low, no preheat, avoid sulphur/lead/oil contamination and use full penetration to prevent crevices.
What surface finishes work on C72200-H02?
Not anodisable; pickle in sulphuric/hydrogen-peroxide type baths, then leave bare for seawater (protective oxide film) or apply tin, nickel or silver plating for electrical/joining surfaces.
Can C72200-H02 be formed, bent or molded?
Excellent cold formability in O61 (deep drawing, tube bending, roller expansion); interanneal near 700–800 °C, hot work 850–1000 °C, and never hot work in sulphur-bearing atmospheres.
What is the maximum service temperature of C72200-H02?
C72200-H02 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 C72200-O61 and C72200-H08?
O61 is the default condition — standard condition for seawater condenser and heat-exchanger tube, tube-sheet cladding and deep-drawn parts; maximum ductility and best corrosion behaviour. H08: maximum cold-worked strength for corrosion-resistant springs, diaphragms and contacts in marine or chemical atmospheres. Yield strength is 150 MPa in O61 versus 570 MPa in H08.
Sources
- ASTM B111/B111M — Copper and Copper-Alloy Seamless Condenser Tubes — ASTM International (2021)
- ASTM B466/B466M — Seamless Copper-Nickel Pipe and Tube — ASTM International (2020)
- CDA Alloy Database — C72200 Copper-Nickel-Chromium — Copper Development Association (copper.org) (2023)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- Copper-Nickel Alloys: Properties and Applications in Seawater Systems — Nickel Institute / CDA (2018)
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.