Advantages & Disadvantages Of Monel 400

What is Monel 400 made of?

Monel 400 is a binary alloy, commonly referred to as a ‘puritan alloy.’ This indicates that the nickel and copper proportions are the same as those of natural ore collected from Sudbury.

Monel 400 is owned by Special Metals Corporation and consists mainly of a 52–67% nickel (Ni) and copper (Cu) product, with tiny quantities of iron, manganese, carbon and silicon. Compared to steel, it works hard for the machine.

Forms of Monel 400 Available

This alloy comes in several shapes and product lines, such as rod and bar; however, Ulbrich mostly provides this alloy in strip and wire form. This Monel alloy may be utilized for special applications at higher gages and thicknesses than other nickel alloys or stainless steels because of its great strength. The Monel 400 springs may be manufactured in several band finishes and tempers; it may be manufactured in many wires, including flat and round400 Monel springs.


  • High Strength and Corrosion-Resistant 

Monel 400 operates at a broad range of temperatures and is accessible for many applications because of its excellent strength and corrosion resistance qualities. Different Monel grades are employed in a broad variety of sectors, from aerospace to marine applications. It is widely used for pipe since it is resistant to both the atmospheres of steam and sea-water In particular.

  • Increased Toughness

This alloy may be utilized for oil extraction, which is of considerable advantage for enhanced toughness. It is also very resistant to hydrofluoric acid corrosion, therefore allowing the manufacture of valves, stalks and interior fittings in which other materials are not exposed to harsh circumstances. It is also utilized in stuff like oil well drill necklaces. Its corrosion resistance is equivalent to MONEL alloy 400; however, it may be more prone to stress-corrosion cracking in certain situations under age-hard conditions. It is thus not uncommon to combine these two MONEL alloys to exploit their strengths.

  • Durable

These Monel 400 Springs are more robust than pure nickel commercially, and they can withstand several types of corrosion, making them flexible and cost-effective. In a broad variety of sectors, from aerospace to marine applications, several Monel grades are employed. They also play a significant role in the oil and gas sector, from mining through storage and production to refining.

Other benefits include 

  • A robust mechanical strength availability of appealing look and finishes, such as sheets, plates, rods, bars, pipes and pipes.
  • Capacity to hold up in high temperature and cold temperature circumstances

Disadvantages of Monel

Although Monel has several benefits, it’s not a perfect metal. It has inconveniences such as:

  • Poor Machinability
  • In a saltwater environment, exposure to pitting corrosion.
  • Galvanic corrosion may sometimes occur in the presence of Monel.

Additional prospective benefits of Monel 400 springs include heat exchangers, gas systems, seawater scrubbers, cladding, chemical pumps, shafts, and more. It may be employed in a range of atmospheres because of its excellent mechanical qualities, from sub-zero temperatures to over 1000° F. In reality, Monel 400 is usually a more costly alloy than stainless steel.