Menu Close

Monel or Inconel? Which Flanges are Better to Use?

In this article we are going to discuss the differences and advantages of Monel Flanges vs Inconel Flanges.

Monel

Monel is an alloy consisting of nickel (65-70%) and copper (20-29%) and also contains iron and manganese (5%) and other compounds.

There are different commercial types of Monel such as Alloy 400, Alloy 401, Alloy R-405, Alloy 450, Alloy K-500, and Monel 404 Copper-Nickel Alloy.

Overview

There are multiple variations of Monel alloys, starting with Monel 400, which contains at least 63% nickel, between 29% and 34% copper, between 2% and 2.5% iron, and between 1.5% and 2% manganese. Monel 405 adds no more than 0.5% silicon, and Monel K-500 adds between 2.3% and 3.15% aluminum and between 0.35% and 0.85% titanium. These and other variations all are valued for their resistance to attack by acids and alkalis, as well as for their high mechanical strength and good ductility.

Monel 400 contains the same quantity of nickel and copper as is found in a naturally occurring nickel ore. It has high strength and can be hardened only by cold working. Due to its resistance to deterioration, Monel 400 is most often used in parts found in marine and chemical environments. While it is a very useful metal, it is cost-prohibitive in most applications. Monel 400 costs 5 to 10 times more than ordinary nickel or copper.

As a result, it is used rarely—and only when no other metal could do the same job. As an example, Monel 400 is one of the few alloys that maintains its strength in sub-zero temperatures, so it is used in those circumstances. You can buy High quaility Monel 400 Flanges at best prices only at citizenflanges. We are also Monel K500 Flanges Manufacturer in India

Characteristics of Monel

  • Highly resistant to corrosion. Monel is well known as corrosion strong, rust-resistant material. It is resistant to corrosion and acids, and some alloys can withstand a fire in pure oxygen.
  • Stronger than steel
  • Malleable
  • Low coefficient of thermal expansion
  • Highly resistant to alkalis
  • It can be welded, brazed and soldered

Market applications

Monel is used for marine engineering, chemical, and hydrocarbon processing equipment, valves, pumps, shafts, fittings, fasteners, and heat exchangers. It is also used as part of metal instruments and frames of eyeglasses.

In the 1950s Monel started to be replaced by stainless steel which could produce the same forms at a lower cost (due to the use of less nickel).

INCONEL

Inconel is an alloy consisting of nickel (50-72%) and chromium (14-21%) and also contains iron and molybdenum. Inconel is considered a superalloy and special metals with specific applications. It has several characteristics that make it a desirable metal. Inconel alloys are resistant to corrosion which makes it suitable for some extreme environments. It is also resistant to oxidation and can withstand high temperatures. When it is exposed to heat, Inconel forms a layer to protect the surface from heat and other damage. It is not only heat resistant but maintains its strength when heated.

Overview

There are multiple variations of Inconel alloys, starting with Inconel 600 which contains at least 72% Nickel, between 14 – 17% Chromium, between 6-10% Iron and other elements like Carbon, Manganese, Silicon, etc. Inconel 625 which contains at least 58% Nickel, between 20-23% Chromium, around 5% Iron, between 8-10% Molybdenum, between 3.15-4.15% Niobium (plus Tantalum) and other elements like Carbon, Manganese, Silicon, etc. Inconel 718 adds 50-55% Nickel (plus Cobalt), 17-21% Chromium, 4.75-5.50% Niobium (plus Tantalum), 2.80-3.30% Molybdenum, and other chemical components like Iron, Cobalt, Carbon, Manganese, Silicon in a small percentage. All these variations are well-known for their high-strength, corrosion-resistance, high yield strength, tensile strength, and creep-rupture properties, etc. Citizenflanges is leading manufacturer, supplier and exporters of Inconel 625 Flanges in India.

Characteristics of Inconel

  • Corrosion resistant which makes it suitable for some extreme environments.
  • Oxidation resistant and can withstand high temperatures. When it is exposed to heat, Inconel forms a layer to protect the surface from heat and other damage.
  • Maintains its strength when heated.
  • Pressure resistant which makes it perfect for extreme applications.

Market applications

Due to all these properties, Inconel alloys can be used for a wide variety of applications, including sea-water applications. The characteristics of Inconel alloys make it perfect for propeller blades, submarine auxiliary propulsion motors, steal-line bellows, submarine quick disconnect fittings, and more.  It is also widely used in aircraft ducting systems, engine exhaust systems, hydraulic line tubing and heat-exchanger tubing in environmental control systems.

Depending on the type of project you can choose between Inconel Flanges where extreme environment or heat is being applied and Monel Flanges where they are to be applied in marine and chemical environments.

Monel or Inconel? Which Flanges are Better to Use?

by admin time to read: 3 min
0