ThePipingMart Blog Fasteners Inconel Bolts vs Monel Bolts – What’s the Difference

Inconel Bolts vs Monel Bolts – What’s the Difference

Inconel and Monel look like rhyme, but both are opposite concerning their properties, features, characteristics, and other parameters. Here, one thing is common that Inconel and Monel are the two metal alloys of nickel useful in extreme environments.
 

 

Monel Bolts

Here, Monel bolts is a mid-range specialty alloy that offers shine to bolts. Such property is one of the few alloys that can sustain well in hydrofluoric acid. The solution of hydrochloric acid corrodes even pure metal on the earth. It is a right choice for economically sound products. As compared to Inconel bolts, Monel bolts are suitable for marine water conditions. Monel bolts are useful in rapidly moving and hide tidal seawater. Monel bolts are helpful to work at moderate temperatures, and solutions contain fewer concentrations of acid. Here, the following is the side-by-side comparison of these two bolts.

ConditionMonel boltInconel bolt
Yield strength40 ksi65 ksi
Tensile strength80 ksi125 ksi
Usable temperature rangeCryogenic to 1000-degree FCryogenic to 1800-degree F
Salt waterVery goodExcellent
Nitric acidNot acceptableGood
Hydrfluoric acidExcellentLow

Inconel Bolts

In contrast, Inconel bolts work much better than Monel bolts due to its high-temperature workability, strength, and corrosion resistance. Inconel bolts are 50% stronger than yield strength, 60% stronger in tensile strength and offer double the usable temperature capacity. Inconel is an alloy of nickel, chromium, and iron as it makes it suitable for corrosive and thermal conditions. These elements offer outstanding mechanical properties and high strength and working ability. High nickel in Inconel provides corrosion resistance against organic and inorganic components. The presence of chromium provides resistance to oxidation and the ability to serve at high temperatures. Inconel bolts are useful in the chemical industry due to its strength and corrosion resistance.

Difference Between Inconel Bolts and Monel Bolts

  • Inconel bolts are made from an alloy of nickel and chromium, while Monel bolts are made from an alloy of nickel and copper.
  • Inconel bolts are more resistant to corrosion than Monel bolts.
  • Inconel bolts are more expensive than Monel bolts.
  • Inconel bolts are better suited for high-temperature applications than Monel bolts.
  • Inconel bolts are better suited for applications where corrosion resistance is required than Monel bolts.

Which is better between Inconel and Monel?

Here, Monel is the best material that offers additional features and properties in comparison to Inconel. Monel bolts show outstanding corrosion resistance to the solution containing hydrofluoric acid. As compared with the seawater to Inconel bolts, the Monel product works very well. Additionally, they are available at a more economical price. Monel bolts provide a strong technical base for low concentration and low-temperature environments.

Reaction to hydrofluoric acid

Monel offers more corrosion resistance than hydrofluoric acid and some other materials. Hydrofluoric acid is a novel material that shows corrosion resistance after coming in contact with Monel. Further, Monel bolts can sustain a concentrated solution of hydrofluoric acid and even up to the boiling temperature. Monel bolts work suitably when immersed in a solution containing hydrofluoric acid. Aeration and oxidizing salts increase the corrosion rate. Besides, Inconel bolts do not work well than Monel bolts.

An Economical Option for Saltwater

Monel and Inconel bolts are products that perform exceptionally well in saltwater conditions. Here, the difference is that Monel bolts offer pitting corrosion in stagnant seawater. Also, they show resistance to pitting and slows after the initial attack of salt solution. Monel bolt shows superior working ability to work in rapidly moving seawater. These materials offer a suitable material choice for naval operations. Monel bolts are ideal in a highly corrosive environment compared to Inconel bolts.

Related Post