ASTM B466 UNS C70600 Copper Nickel Reducer CuNi 90/10 Buttweld Fittings
ASTM B446 / ASME SB466 UNS C70600 , CuNi 90/10 Nickel Alloy Steel Butt Weld Reducer
ASTM B466 C70600 copper-nickel fittings (e.g., reducers) are seamless 90-10 Cu-Ni alloy components designed for demanding marine and industrial applications, composed primarily of copper (88.6–90.5%), nickel (9–11%), and iron (1–1.8%). Renowned for exceptional seawater corrosion resistance, biofouling inhibition, and mechanical strength (tensile: 290–380 MPa), these fittings are widely used in shipboard piping, desalination plants, and offshore oil/gas systems.
Equivalent Grades of ASTM B466 UNS C70600 Copper Nickel Reducer
| STANDARD | WERKSTOFF NR. | UNS |
| Cu-Ni 90/10 | 2.0872 | C70600 |
| EUROPE | DIMENSIONAL STANDARD AND SPECIFICATIONS | DIN28011 / DIN86087 / DIN86088 / DIN86089 / DIN86090 |
| EEMUA 146 | ||
| STF 330430 / C113 | ||
| MATERIAL STANDARD | 2.0872 / 2.1972 | |
| UNS7060X | ||
| CW352H | ||
| CN102 | ||
| U.S.A | DIMENSIONAL STANDARD AND SPECIFICATIONS | ANSI B16.9 |
| MATERIAL GRADE | UNS C70600 / C70610 / C70620 | |
| DELIVERY CONDITION | O / O60 |
ASTM B466 UNS C70600 Copper Nickel Fittings
| Elbows | Long Turn, Double Sweep |
| Long Radius 90° | Reducers |
| Long Radius 45° | Concentric |
| Short Radius 90° | Eccentric |
| Long Radius Reducing 90° | Sleeves, Class 200 and 50 |
| 180° Long Radius Return Bends | 45° Laterals |
| Tees | Caps |
| Straight | ASME Flanged and Dished Heads |
| Reducing | Lap-Joint Stub Ends |
| Long Turn, Single Sweep | Collar |
European and American Standards Copper Nickel 90/10 Pipe Fittings
| BUTT WELD FITTINGS 90/10 | EEMUA | DIN | ANSI |
| ELBOWS LONG RADIUS | 146 SECTION 1 | DIN 86090 | B 16.9 |
| ELBOWS SHORT RADIUS | B 16.28 | ||
| EQUAL TEES | 146 SECTION 1 | DIN 86088 | B 16.9 |
| REDUCING TEES | 146 SECTION 1 | DIN 86088 | B 16.9 |
| CONCENTRIC REDUCERS | 146 SECTION 1 | DIN 86089 | B 16.9 |
| ECCENTRIC REDUCERS | 146 SECTION 1 | DIN 86089 | B 16.9 |
| EQUAL SADDLES | 146 SECTION 1 | DIN 86087 | |
| REDUCING SADDLES | 146 SECTION 1 | DIN 86087 | |
| END CAPS | 146 SECTION 1 | DIN 28011 | B 16.9 |
Application
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Marine & Offshore Systems
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Shipbuilding: Seawater cooling pipes, ballast water systems, and condenser tubes in vessels.
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Offshore Platforms: Firewater systems, hydrocarbon cooling lines, and brine transfer pipelines.
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Desalination & Water Treatment
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Reverse osmosis (RO) plants for seawater intake/outfall piping, high-pressure pump connections.
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Brackish water distribution networks resistant to pitting and crevice corrosion.
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Energy & Petrochemical
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LNG Facilities: Cryogenic cooling systems and heat exchanger tubing.
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Oil/Gas: Subsea piping, sour service (H₂S-containing) environments (certified to NACE MR0175).
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Chemical Processing
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Acid-resistant fluid transfer (e.g., dilute sulfuric acid, alkaline solutions).
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Heat recovery systems in corrosive industrial exhausts.
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Power Generation
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Condenser tubing in coastal power plants (resists biofouling and saltwater corrosion).
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Geothermal brine handling systems.
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HVAC & Industrial Plumbing
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Seawater-based cooling loops for coastal buildings.
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Industrial chillers and heat exchangers requiring long-term durability.
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