Corrosion Resistant Copper Nickel Bar C70600 Round Rod High Strength for Marine Use

Corrosion Resistant Copper Nickel Bar C70600 Round Rod High Strength for Marine Use

1. Product Description

The Copper Nickel Bar C70600 (CuNi 90/10) is a high-performance round rod engineered for demanding marine and industrial environments. This alloy consists of approximately 90% copper and 10% nickel, with small additions of iron and manganese to enhance its mechanical properties and corrosion resistance. The material is manufactured through hot rolling or cold drawing processes, followed by precision machining to achieve tight dimensional tolerances and a smooth surface finish. Our C70600 round bars are widely recognized for their exceptional durability, reliability, and long service life in seawater and other aggressive media. Each batch undergoes strict quality inspection to ensure compliance with ASTM B151 standards, making it the preferred choice for engineers and procurement specialists worldwide.

2. Key Technical Parameters

3. Applications

This copper nickel round bar is extensively used in industries where resistance to seawater corrosion and biofouling is critical. Primary applications include:

• Marine hardware and shipbuilding components (propeller shafts, rudder stocks, pump shafts)

• Heat exchanger and condenser tubesheets

• Offshore oil and gas platform equipment

• Petrochemical processing plants

• Valve stems, fittings, and fasteners

• Desalination plants

• Marine exhaust systems

• Hydraulic and pneumatic systems

4. Product Advantages

• Outstanding Corrosion Resistance: Exceptional resistance to seawater, brackish water, and various acids, with a corrosion rate below 0.025mm/year in marine environments.

• Excellent Anti-Biofouling Properties: Copper content naturally inhibits marine organism attachment, reducing maintenance costs and downtime.

• High Strength and Ductility: Balanced mechanical properties provide reliable performance under high pressure and thermal stress conditions.

• Excellent Fabricability: Suitable for hot forging, machining, welding, and brazing without significant loss of properties.

• Long Service Life: Proven track record of 20+ years in marine applications with minimal degradation.

• Cost-Effective: Competitive pricing compared to nickel-based superalloys while delivering comparable corrosion performance in seawater.

5. Key Functions

• Provides structural integrity in corrosive environments

• Resists pitting, crevice corrosion, and stress corrosion cracking

• Prevents marine organism settlement on equipment surfaces

• Maintains mechanical stability under temperature fluctuations (-200°C to 300°C)

• Offers reliable thermal and electrical conductivity for specialized applications

6. Usage Instructions

• Storage: Store in a dry, well-ventilated indoor area, away from acidic or alkaline substances. Keep off ground using wooden pallets to prevent moisture contact.

• Handling: Use appropriate lifting equipment for heavy bars. Avoid dropping or striking to prevent surface damage.

• Machining: Use carbide-tipped tools with proper cooling lubricants. Recommended cutting speed: 60-90 m/min for turning operations.

• Welding: TIG or MIG welding is recommended with matching filler material ERCuNi. Preheating is generally not required.

• Cleaning: Clean with mild soap and water after machining. For heavy oxidation, use a pickling solution followed by thorough rinsing.

• Inspection: Visual inspection should be performed before installation. Check for surface defects, cracks, or dimensional deviations.

7. Precautions

• Avoid prolonged contact with strong oxidizing acids (e.g., nitric acid) which may cause rapid corrosion.

• Do not use in environments containing ammonia or ammonium compounds above 50°C.

• For high-temperature applications exceeding 300°C, consult our technical team for performance data.

• Ensure proper grounding when used in electrical systems to prevent galvanic corrosion when joined with dissimilar metals.

• Wear protective gloves and safety glasses during machining operations.

8. Shipping Information

• Lead Time: 15-30 working days after order confirmation and deposit receipt.

• Shipping Methods: By sea freight (FOB Shanghai), air freight, or international courier based on order quantity and urgency.

• Packaging: Standard export seaworthy packing with wooden crates or steel frames, protected with anti-rust paper and plastic wrapping.

• Documents Provided: Commercial invoice, packing list, bill of lading, certificate of origin, material test certificate (MTC), and inspection report.

​9. Payment Terms

• Payment must be completed within the agreed timeframe to avoid shipment delays.

• All bank charges outside China are to be borne by the buyer.

10. Packaging Details

Each copper nickel round bar is individually protected to prevent scratches and corrosion during transit:

• Inner Protection: Anti-rust oil coating + VCI paper wrapping

• Intermediate Layer: Bubble film or foam padding for shock absorption

• Outer Packaging: Steel-framed wooden crates or sturdy plywood boxes, strapped with steel bands

• Marking: Clear labels indicating material grade, size, heat number, and gross/net weight on each package

• Custom Packaging: Available upon request (e.g., plastic caps on ends, bundled with nylon straps)

11. After-Sales Policy (Return, Exchange & Warranty)

• Quality Guarantee: All products are backed by a 12-month warranty against manufacturing defects from the date of delivery.

• Return Conditions: Returns are accepted within 30 days of receipt if the products are unused, in original packaging, and accompanied by a valid inspection report showing non-conformance to agreed specifications.

• Exchange Policy: Free replacement will be provided for any products that fail to meet the contracted dimensions, material grade, or mechanical properties, subject to third-party testing verification.

• Return Shipping: If the return is due to our quality issue, we will bear all return shipping costs. If the return is due to buyer's change of mind, the buyer covers shipping and a 20% restocking fee applies.

• Claim Process: Notify our sales team within 7 days of discovering any discrepancy. Provide photos, inspection records, and heat number for traceability.

• Technical Support: Our engineering team is available for installation guidance and material selection consultation via email or video call.