Below is detailed technical information about C71000 copper-nickel alloy and a comparison with other copper-nickel alloys (such as C70400 and C70600):
Basic Information
Common name: Copper Nickel 10 (CuNi10), a member of the corrosion-resistant copper-nickel alloy family.
Standards: ASTM B111 (Seamless Copper Alloy Tubes for Condensers and Heat Exchangers), ASTM B466 (Copper-nickel Alloy Plate/Strip).
International Similar Designations:
DIN: CuNi10Fe1.6Mn
EN: CW352H (EN 12449). Chemical Composition (ASTM B111 Standard)
Performance Characteristics
Corrosion Resistance
Seawater Environments: Its seawater corrosion resistance lies between that of C70400 (CuNi5) and C70600 (CuNi10Fe1.6), but its resistance to high-velocity fluid erosion is significantly superior to that of C70400 (due to the addition of Fe).
Acid Resistance: Its corrosion resistance to dilute sulfuric acid and chloride solutions is superior to that of pure copper, but weaker than that of C70600 (due to its slightly lower Ni content).
Biofouling Resistance: Suitable for preventing algae and shellfish from attaching in marine environments.
Mechanical Properties
Tensile Strength: 310-380 MPa (similar to C70600, but higher than the 275-345 MPa of C70400).
Yield Strength: 120-200 MPa (comparable to C70600). Elongation: 25-35% (plasticity lower than C70400's 35-45%).
Hardness: HB 90-130 (higher than C70400's HB 80-110).
Workability
Cold Working: Requires higher power, suitable for rolling and drawing (annealed state is preferred).
Hot Working: Recommended temperature 800-950°C, avoid overheating (to prevent grain coarsening).
Weldability: Preheating (150-250°C) is required, TIG welding (ERCuNi wire) is recommended.
Typical Applications
Marine Engineering: Ship condenser tubes, desalination preheaters, medium-speed seawater pumps and valves.
Energy Industry: Geothermal heat exchangers, nuclear power cooling water pipes (requires radiation-resistant coating).
Chemical Equipment: Dilute sulfuric acid pipelines, valves for salt spray environments.
Surface treatment: pickling, passivation, polishing (to reduce the risk of biofouling).
why choose us
Professional copper pipe supplier
As a professional enterprise dedicated to global copper product trade since 2008, GNEE Metal Group deeply recognizes the quality and responsibility embodied in the ASTM B111 standard. This standard not only specifies chemical composition and mechanical properties but also represents a comprehensive quality commitment spanning manufacturing processes to testing and verification. GNEE solemnly assures global customers that every ASTM B111-standard condenser tube and copper alloy tubing we supply will strictly adhere to its requirements for seamless manufacturing, annealing treatment, eddy current testing, and various mechanical performance tests.
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