Cupronickel is a metal alloy composed primarily of copper and nickel, typically containing around 60% copper and 40% nickel, although the proportions can vary. It is known for its corrosion resistance, durability, and ability to withstand high temperatures, making it suitable for various applications, including marine engineering, coinage, and the manufacturing of various industrial components. Cupronickel also has a silvery appearance and is often used in the production of vessels and equipment that require resistance to saltwater corrosion.