Cupronickel Alloy Guide: C70600 vs C71500
Copper Nickel Alloys in Marine and Offshore Engineering: A Practical Overview Copper Nickel Alloys in Marine and Offshore Engineering: C70600 vs C71500 Explained In marine, offshore, and desalination engineering, material selection for seawater-wetted components is one of the most consequential decisions a procurement or engineering team makes. Choose the wrong alloy and you face accelerated corrosion, biofouling, and premature failure. Choose the right one and the system runs for decades with minimal intervention. Copper nickel alloys — commonly called cupronickel — sit at the top of the seawater service material hierarchy for very good reason. This article provides a practical overview of the two most widely specified copper nickel grades — C70600 (90/10) and C71500 (70/30) — covering their composition, properties, typical applications, and how to select the right grade for your project. Cupronickel alloys combine outstanding seawater corrosion resistance, inherent bi...