Seawater Resistant Copper Nickel 70/30 Plate ASTM B171 C71500 Weldable CuNi

Product Specification

Seawater Resistant Copper Nickel 70/30 Plate ASTM B171 C71500 Weldable CuNi Sheet

1. Product Description
Copper Nickel Plate is a high‑performance copper‑nickel alloy plate containing 10% or 30% nickel, with iron and manganese additions to improve erosion resistance and mechanical strength. The alloy is noted for its exceptional durability in seawater and other chloride‑rich environments. Typical designations are UNS C70600 (CuNi90/10) and UNS C71500 (CuNi70/30), as well as Chinese grades BFe10‑1‑1 and BFe30‑1‑1. Manufactured via hot rolling for thicker sections and cold rolling for thinner gauges, these plates offer consistent quality and dimensional accuracy. They can be supplied in various tempers: annealed, quarter‑hard, half‑hard, and full‑hard. Surface options include hot rolled (unpickled), pickled, cold rolled bright (2B), polished (mirror or satin), and chequered (diamond or teardrop). All plates meet ASTM B171, ASME SB171, or GB/T 15272 standards.
2. Product Applications

• Marine seismic survey vessels: Airgun array plates, compressor room seawater cooling plates.

• Dredging equipment: Suction pipe liners, cutter head support plates, discharge pipeline wear plates.

• Oceanographic research: CTD (conductivity, temperature, depth) instrument housings, underwater camera sled frames.

• Subsea oil & gas: Umbilical termination unit plates, ROV tooling skid wear plates, subsea distribution unit covers.

• Coastal defense structures: Wave attenuator connection plates, floating breakwater hinge plates.

• Railway seawater cooling systems (coastal lines): Transformer cooling plates for traction substations.

3.Product Advantages

• Proven performance in high‑velocity seawater – Erosion‑corrosion rates <0.1 mm/year at 3.5 m/s for C70600.

• Excellent resistance to hydrogen induced cracking (HIC) – Suitable for cathodically protected systems.

• Good galvanic compatibility with noble metals when insulated – Can be used near stainless steel with proper dielectric isolation.

• High strength‑to‑ductility ratio – C71500 provides up to 480 MPa tensile strength while maintaining >25% elongation.

• Simple field repair – Damaged plates can be cut out and welded using standard shipyard equipment.

• Resistant to most organic acids and alkalis – Suitable for chemical tank wash systems.

• Cost‑effective alternative to titanium in moderate salinity water – Lower material cost with adequate performance.

4. Key Product Parameters

 
FAQ
1. Are you trading company or manufacturer ?
We are manufacturer ,You can see the certification.
2. How long is your delivery time?
Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to quantity.
3. Do you provide samples ? is it free or extra ?
Yes, we could offer the sample for free charge but need pay the cost of freight.
4. What is your terms of payment ?
Payment<=1000USD, 100% in advance. Payment>=1000USD, 50% T/T in advance ,balance before shippment.