Monel is a nickel-copper alloy which is a solid-solution that can be hardened only by cold working, therefore, it has high strength and toughness over other metals. It represents good corrosion resistance, good weld ability, etc.
Monel 400 is a nickel-copper alloy (about 67% Ni – 23% Cu) that is resistant to sea water and steam at high temperatures as well as to salt and caustic solutions. Monel 400 is a solid solution alloy that can only be hardened by cold working. This nickel alloy exhibits characteristics like good corrosion resistance, good weldability and high strength.