Monel 400 or in generic form, Alloy 400 is an alloy primarily of Nickel and Copper. The Monel
name applies when it is produced by Special Metals Corporation. The UNS designation is
Alloy 400 is a solid solution alloy with a nominal composition of 31% copper and 67% nickel and
is not hardenable by heat treatment. Cold work can be used to increase yield and tensile
Corrosion resistance is excellent. Monel 400 has excellent marine environment performance
and is found in many applications.
Alloy 400 may or may not respond to a magnet at room temperature depending on the chemical
composition and condition which affect the Curie temperature.
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