C70600 Copper

Grade Designation & Standards

Standard Grade: C70600 (Cu-Ni Alloy, equivalent to Chinese grade BFe10-1-1)

International Equivalents:

• UNS: C70600 (ASTM B111M, B122)

• EN: CW354H (DIN 17663)

Applicable Standards:

• GB/T 5231-2012 (Wrought Copper Alloys)

• ASTM B111M, B122, B151M, B466M

C70600 Copper Nickel Product Features

1. Exceptional Corrosion Resistance: Resists seawater, weak acids, saline solutions, and high-temperature oxidation (corrosion rate ≤0.003 mm/a); anti-biofouling in marine environments.

2. Mechanical Excellence: Combines high plasticity (soft-state elongation ≥28%) and strength (hard-state tensile strength ≥550 MPa), suitable for high-load applications.

3. Machinability: Supports cold/hot working, welding (TIG/MIG), and stamping; surface finish up to Ra 0.1μm.

4. Temperature Adaptability: Operates reliably from -100°C to 371°C with no low-temperature embrittlement.

Common Product Forms & Dimensions

C70600 Chemical Composition

UNS C70600 Material Properties

Physical Properties

Mechanical Properties

Core Advantages

1. Industry-Leading Corrosion Resistance: Resists stress corrosion cracking and high-temperature dezincification, ideal for harsh environments (seawater, chemical media).

2. High Machining Flexibility: Compatible with stamping, welding, and forging for diverse industrial needs.

3. Cost-Efficiency: Lower cost than high-nickel alloys (e.g., C71500) with performance close to BFe30-1-1.

Product Applications

1. Marine Engineering: Seawater desalination evaporator tubes, ship condensers, offshore platform components.

2. Chemical Equipment: Petrochemical coolers, reactors, heat exchanger sleeves.

3. Power Industry: Power plant steam turbine condensers, nuclear cooling systems.

4. Aerospace: Hydraulic system pipelines, engine components.

Processing Guidelines

1. Welding: Prefer TIG or laser welding; interpass temperature ≤100°C to avoid hot cracking.

2. Annealing: Post-cold working, anneal at 650-750°C to relieve stress; hot working temperature: 900-960°C.

3. Environmental Requirements: Welding humidity <90%; preheat to 15°C if ambient temperature is <0°C.

FAQs

1. Q: How does C70600 differ from BFe30-1-1?

A: C70600 has lower Ni content (9-11% vs. 30%), slightly lower strength but higher plasticity, similar corrosion resistance, and lower cost.

2. Q: Is it suitable for strong acid environments?

A: Suitable for weak acids and seawater but avoid strong oxidizing acids (e.g., concentrated nitric acid).

3. Q: Post-weld heat treatment for tubes?

A: Recommend low-temperature annealing (250-300°C) to eliminate residual stress.

Standard References

• Chemical Composition: ASTM B111M, GB/T 5231-2012.

• Mechanical Testing: GB/T 8890-2007, ASTM B122.

• Processing: ISO 426-2, AMS 4590 (Aerospace Standard).

Note: Data consolidated from industrial standards and technical documents. Actual parameters may vary slightly due to manufacturing processes. Refer to supplier test reports for precise specifications.