Copper Nickel 70 / 30 Sheets to clients. We also offer the same at market leading prices. Copper Nickel 70 / 30 Plates (UNS C71500) are used in welding backing rings, flexible metal hose, weld wire and boiler parts. These Cupro Nickel 70 / 30 Plates are also used as machined and forged valve and pump parts that are utilized for seawater services. Our Cu-Ni 70 / 30 Sheets are also used in Condensers, Seawater piping, Power plants, Exchanger shells, and more. Our Cu-Ni 70 / 30 Plates retain strength over a wide temperature range, attractive for high temperature applications. We are a known manufacturer, exporter and supplier of these products that offer in different sizes and shapes to our clients.