Copper Nickel 90/10 Marine Elbow

Copper Nickel 90/10 Marine Elbow

Our copper nickel 90/10 marine elbow (UNS C70600) is purpose-built for seawater piping, shipbuilding and offshore platforms where resistance to seawater corrosion and biofouling is essential to long-term reliability. The 90/10 copper-nickel alloy combines excellent corrosion resistance in both flowing and stagnant seawater with natural resistance to marine organism attachment, which reduces blockages, maintenance and total cost of ownership.

Manufactured to ASTM B466 and ASME B16.9 dimensional requirements, these butt weld elbows deliver leak-free performance in cooling water systems, ballast lines, firefighting circuits and heat exchanger service. We supply with full material traceability and can arrange classification-society certification for marine projects. Our experience in marine-grade alloys ensures consistent composition and dependable mechanical properties on every batch.

We source 90/10 copper-nickel from mills with full composition certification and verify each batch by positive material identification before fabrication. Forming and welding are carried out under controlled conditions to preserve the alloy's seawater-corrosion and biofouling resistance. Finished fittings are dimensionally inspected and documented to deliver complete traceability from raw material to final product.

Specifications

Key Features & Advantages

• Natural resistance to seawater corrosion and marine biofouling extends service intervals.
• Excellent resistance to stress corrosion cracking, pitting and crevice attack in saline service.
• Good thermal conductivity makes it well suited for heat exchanger and condenser duties.
• Low magnetic permeability is preferred for sensitive marine and naval applications.
• Available with mill test certificates and classification society approval on request.
• Consistent alloy composition verified by positive material identification (PMI).
• Supplied in seamless and welded construction to match system pressure requirements.

  

  

  

  

  

Applications

These elbows are widely used across demanding industries, including:

• Ship seawater cooling and ballast systems
• Offshore platform firefighting and deluge lines
• Coastal desalination and power plant cooling
• Heat exchangers and condensers
• Marine and naval piping systems

Frequently Asked Questions

Q: Why choose copper nickel for marine piping?

A: Copper nickel 90/10 resists seawater corrosion and inhibits the attachment of marine organisms, which reduces blockages and maintenance costs in ship and offshore systems.

Q: What is the difference between 90/10 and 70/30 copper nickel?

A: 90/10 (C70600) offers excellent seawater resistance at a more economical cost, while 70/30 (C71500) provides higher strength and is often preferred for higher-velocity or more aggressive seawater service.

Q: Do you supply classification-society-certified marine elbows?

A: Yes, we can arrange DNV, ABS and LR certification for shipbuilding and offshore projects upon request.

Q: Is copper nickel suitable for firefighting systems?

A: Yes, copper nickel is widely specified for seawater firefighting and sprinkler systems because of its corrosion resistance and reliable long-term performance.

Q: What lead time can I expect for copper nickel marine elbows?

A: Stock sizes typically ship within 7–10 working days, while custom sizes and larger orders take about 20–30 days depending on quantity and specification.