Monel 400 Spiral Wound Gasket

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Welcome to Know Monel 400 Spiral Wound Gasket

Monel 400 spiral wound gasket is a good choice when the gasket needs cotact sea water and steam at high temperatures. As Monel 400 is a nickel-copper alloy (about 67% Ni – 23% Cu) that is resistant to sea water and steam at high temperatures. Not only that, Monel 400 exhibits characteristics like good corrosion resistance, good weldability and high strength.

This gasket is expensive compared to other steel spiral wound gaskets. But we had stocks enough materials to produce any order in short time. We are quality suppliers and manufacturers.

Monel 400 Spiral Wound Gasket Centering Ring Material

When the Monel 400 spiral wound gasket is CG or CGI type, it will have a centering ring also called outer ring. The outer ring can locate the gasket on the mating flange faces, so it can prevents over compression of the sealing element and ensure the best sealing performance.

The gasket centering ring material is often made from carbon steel, as it is cheap choice. However, the manufacturer may also use some stainless steel like SS304 or SS306 as customers’ requirement.

The Advantages of Monel 400 Spiral Wound Gasket

  • Alloy 400 gasket has good resistantance to seawater and steam at high temperatures.
  • It has excellent resistance to rapidly flowing brackish water or seawater
  • The gasket has excellent resistance to stress corrosion cracking in most freshwaters
  • The gasket has particularly resistantance to hydrochloric and hydrofluoric acids when they are de-aerated
  • It also has excellent resistance to neutral and alkaline salt
  • It has good mechanical properties from sub-zero temperatures up to 1020° F

What time to Replace a New Monel 400 Spiral Wound Gasket?

Monel 400 spiral wound gasket is a good sealing gasket, as it has high corrosion resistance and stable performance in high and low temperatures. But it still has a service life and must be replaced at some point. Ideally, a new alloy 400 spiral wound gasket should be replaced as soon as leakage is visible. Also, it is best to plan replacement as soon as signs of wear and tear are visible. The operating conditions, the medium, and environmental conditions will influnce the gaskets’ service life and replacement time.

Chemical Composition of Monel 400 (%)


Mechanical Properties of Monel 400 Spiral Wound Gasket

Tensile strengthMpa570
Yield strengthMpa362
Elongation at break%38
HardnessBrinell HB200
By the way the density of the soft iron is 8.89 g/cm3