Cupronickel (also known as copper-nickel) is an alloy of copper that contains nickel and strengthening elements, such as iron and manganese. Despite its high copper content, cupronickel is silver in colour.

Due to the specific properties of nickel and copper alloys, they are applied in various domains of industry e.g. coin and medal minting, armaments manufacture, desalination materials, marine engineering, and extensively used in the chemical, petrochemical and electrical industries.[1]

Cupronickel is highly resistant to corrosion in seawater. For this reason, it is used for piping, heat exchangers and condensers in seawater systems, marine hardware, and sometimes for the propellers, crankshafts and hulls of premium tugboats, fishing boats and other working boats.

Another common use of cupronickel is in silver-coloured modern-circulated coins. A typical mix is 75% copper, 25% nickel (a proportion of 3:1), and a trace amount of manganese. In the past, true silver coins were debased with cupronickel.


Aside from the terms cupronickel and copper-nickel, several other terms have been used to describe the material: the tradenames Alpaka or Alpacca, Argentan Minargent, and the French term cuivre blanc ("white copper") are still registered; cupronickel is also occasionally referred to as hotel silver, plata alemana (Spanish for "German silver"), German silver, and Chinese silver.[2]

Other Languages
català: Cuproníquel
čeština: Mědinikl
Deutsch: Kupfernickel
Ελληνικά: Χαλκονικέλιο
español: Cuproníquel
Esperanto: Kupronikelo
français: Cupronickel
Gaeilge: Coprainicil
galego: Cuproníquel
한국어: 백동
hrvatski: Kupronikl
italiano: Cupronichel
Bahasa Melayu: Kupronikel
日本語: 白銅
norsk nynorsk: Koparnikkel
ਪੰਜਾਬੀ: ਕੁਪਰੋਨਿੱਕਲ
português: Cuproníquel
Simple English: Cupronickel
slovenčina: Medinikel
svenska: Kopparnickel
Tiếng Việt: Đồng niken
粵語: 白銅
中文: 白铜