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

ASTM B466 UNS C70600 Copper Nickel Fittings​

European and American Standards Copper Nickel 90/10 Pipe Fittings

Application

1. Marine & Offshore Systems

   • Shipbuilding: Seawater cooling pipes, ballast water systems, and condenser tubes in vessels.

   • Offshore Platforms: Firewater systems, hydrocarbon cooling lines, and brine transfer pipelines.

2. Desalination & Water Treatment

   • Reverse osmosis (RO) plants for seawater intake/outfall piping, high-pressure pump connections.

   • Brackish water distribution networks resistant to pitting and crevice corrosion.

3. Energy & Petrochemical

   • LNG Facilities: Cryogenic cooling systems and heat exchanger tubing.

   • Oil/Gas: Subsea piping, sour service (H₂S-containing) environments (certified to NACE MR0175).

4. Chemical Processing

   • Acid-resistant fluid transfer (e.g., dilute sulfuric acid, alkaline solutions).

   • Heat recovery systems in corrosive industrial exhausts.

5. Power Generation

   • Condenser tubing in coastal power plants (resists biofouling and saltwater corrosion).

   • Geothermal brine handling systems.

6. HVAC & Industrial Plumbing

   • Seawater-based cooling loops for coastal buildings.

   • Industrial chillers and heat exchangers requiring long-term durability.