Monel 400 Flanges are a type of weld neck flange made from a nickel-copper alloy with high strength and excellent corrosion resistance. Monel 400 Flanges have been the standard in industries such as acid processing, food processing and petrochemical production for over 100 years. These durable flanges have superior corrosion resistance when exposed to seawater or other harsh environmental elements. Furthermore, Monel 400 has good mechanical properties at elevated and sub-zero temperatures, making it an ideal choice for applications requiring frequent temperature changes.

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400 Monel Alloy Flanges Corrosion Resistance

UNS N04400 Flanges are known for their superior corrosion resistance due to their composition of nickel and copper. Monel 400 Weldneck Flanges, in particular, have a high strength-to-weight ratio, making them ideal for various applications such as offshore rigs, oil & gas pipes, sewage systems and more. They can withstand harsh environments like seawater or acidic compounds without any problems and remain highly resistant to both crevice and pitting corrosion. Additionally, the weld neck flange design ensures that the joint is strong and leakproof.

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Monel 400 Flanges Machining

ASTM F467 weld neck flanges can be machined through the production of various operations, such as sawing, turning, facing, drilling, and tapping. Machining this type of material requires special tooling due to its high nickel content and hardness. The best way to machine a weld neck flange is by using an index-able insert that has been specifically designed for the job.

Monel 400 Flanges

Monel 400 Flanges

ASTM F467 Flanges Chemical Features

Monel Alloy 400 flanges are mixtures of nickel-copper materials designed for strength and corrosion resistance. These flanges feature a weld neck design, consisting of an inside diameter section that slightly tapers inwards towards the centre. This distinctive shape provides excellent strength and durability while still providing flexibility at their attachment points to other components. The composition includes around two-thirds nickel (Ni), with the rest primarily iron (Fe), manganese (Mn), silicon (Si), sulfur (S), and carbon (C). Monel 400 also contains copper as well, making it especially resistant to oxidation from exposure to seawater or certain acidic compounds. Despite its hardness and resistivity, this material can easily form into shapes like tees, elbows, reducers, and the ever-popular weld neck flange, as mentioned above.

UNS N04400 Flanges Uses

400 Monel Flanges are used in various applications, such as chemical processing, condensers, heat exchangers and other high-temperature or corrosive environments. Their most common form is the Weld neck Flange, which has a tapered hub for welding and bolting to connecting pipes. They provide secure connections with proper alignment for smooth installation and fast assembly of piping systems. They also help reduce leakage because their design increases the contact area to create the tightest possible sealing surface.

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What are Monel 400 flanges?

Monel 400 flanges are metal components that connect pipes, valves, and other equipment in a piping system. They are made from Monel 400 & come in various shapes, sizes, & pressure ratings to suit specific requirements.

What are the properties of Monel 400 flanges?

Monel 400 flanges exhibit high strength, excellent corrosion resistance in a range of environments, good weldability, as well as resistance to pitting & crevice corrosion.

What are the applications of Monel 400 flanges?

Monel 400 flanges are used in various industries, including chemical processing, oil & gas, marine, & aerospace. They are commonly used in piping systems for conveying seawater, hydrofluoric acid, & other corrosive fluids & gases.

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Monel® Alloy 400 Socket Weld Flanges Specification

Specifications ASTM B564 / ASME SB564

Dimensions ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc.

Standard ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, etc.

Size 1/2" (15 NB) to 48" (1200NB)

Class / Pressure 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc.

Flange Face Type Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ)

Grade Monel 400 Flanges UNS (N04400), DIN (2.4360)

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Monel 400 Flanges Equivalent Indian Standard

Monel 400 N04400 2.4360 NU-30M NiCu30Fe NW 4400 NA 13 МНЖМц 28-2,5-1,5

ASTM B564 Monel® Alloy 400 Forged Flanges Chemical Composition

Grade Ni C Al Mn Si Fe Cu S
Monel 400 63.0 min 0.3 max 0.50 max 2.0 max 0.5 max 1.0 - 2.5 28.0 - 34.0 0.02 max

400 Monel ASME SB564 Threaded / Screwed Flanges Mechanical Properties

Density Melting Point Yield Strength (0.2%Offset) Tensile Strength Elongation
8.8 g/cm3 1350 °C (2460 °F) Psi – 35,000 , MPa – 240 Psi – 80,000 , MPa – 550 40 %

Other Types of 400 Monel Industrial Flanges

  • Monel 400 Slip On Flanges
  • 400 Monel® Pipe Flanges
  • Nickel Alloy 400 Blind Flanges
  • Monel® Alloy 400 Orifice Flange
  • Monel Alloy 400 Long Weld Neck Flanges

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