A century of monel metal: 1906–2006

This paper describes the invention of the first nickel alloy developed by the International Nickel Company and patented in 1906 that ultimately came to be known as Monel® alloy 400. The early applications are discussed and contrasted with current uses. From this beginning, a number of nickel-copper alloys were developed, one of which became the first age-hardenable nickel alloy. Developed in the 1920s, the alloy is still known as Monel alloy K-500.