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Monel 400 (K400) pipe and Fittings is a premium nickel-copper alloy known for its exceptional corrosion resistance and high strength. It is widely used in chemical, marine, and industrial applications where durability and reliability are critical. Monel 400 pipes and Fittingss can withstand harsh environments, including seawater, acidic solutions, and alkaline conditions.

Manufactured in both seamless and welded forms, Monel 400 (K400) pipes and Fittingss offer superior mechanical properties. They maintain excellent structural integrity under high temperature and pressure, making them ideal for heat exchangers, condensers, and other demanding equipment in chemical processing plants.

Monel 400 (also known as K400) pipe fittings are high-performance nickel-copper alloys designed for corrosion resistance in aggressive environments. Known for their strength, durability, and resistance to a wide range of chemical and marine conditions, these fittings are widely used in chemical processing, marine engineering, desalination plants, and offshore oil and gas applications.

Monel 400 contains approximately 63% nickel and 28–34% copper, along with small amounts of iron, manganese, and trace elements. This combination of nickel and copper provides excellent resistance to both reducing and oxidizing environments, including seawater, acids, and alkalis, making it suitable for harsh industrial applications.

Monel 400 K400 Pipe Fittingss and Fittingss

The alloy's high resistance to stress corrosion cracking, pitting, and crevice corrosion ensures long service life even in aggressive environments. Monel 400 pipes and Fittingss are particularly favored in marine engineering, offshore applications, and desalination plants, where exposure to saltwater is constant.

Monel 400 (K400) pipe and Fittings is available in a wide range of sizes and dimensions to meet diverse industrial requirements. Its versatility and ease of fabrication make it suitable for welding, bending, and machining, enabling engineers to design customized piping systems efficiently.

Monel 400 pipe fittings offer high tensile strength ranging from 550–650 MPa and yield strength around 240–300 MPa. Elongation typically ranges from 30–40%, providing flexibility and durability under mechanical stress. These properties make Monel 400 fittings suitable for high-pressure and demanding piping systems.

The standout feature of Monel 400 fittings is their exceptional corrosion resistance. They resist pitting, crevice corrosion, and stress corrosion cracking in chloride-rich environments, seawater, and chemical media. This makes them ideal for marine applications, chemical pipelines, and process equipment exposed to aggressive fluids.

Specification Table

Property Description
Material Monel 400 (K400)
Alloy Type Nickel-Copper Alloy
Standards ASTM B366, ASTM B164, ASME SB366
Forms Available Elbows, Tees, Reducers, Flanges, Caps
Temperature Range -200°C to 982°C (-328°F to 1800°F)
Corrosion Resistance Excellent resistance to seawater, hydrofluoric acid, and alkalis
Applications Chemical, Marine, Offshore, Heat Exchangers, Desalination Plants

Chemical Composition (Typical ranges for SSS32760)

Note: Values are typical ranges. Final composition will be confirmed on MTC provided per lot.

Element Composition (%)
Nickel (Ni) 63 min
Copper (Cu) 28 - 34
Iron (Fe) 2.5 max
Manganese (Mn) 1.0 max
Carbon (C) 0.30 max
Silicon (Si) 0.50 max
Sulfur (S) 0.024 max
Cobalt (Co) 1.0 max

Mechanical Properties (Typical)

Property Value
Tensile Strength (MPa) 550 - 750
Yield Strength (MPa) 200 min
Elongation (%) 30 min
Hardness (HRB) 70 - 100
Ductility Excellent
Impact Resistance Good at low temperatures
Temperature Range -200°C to 982°C (-328°F to 1800°F)

Equivalent Grades

Standard Equivalent Grade
ASTM / ASME Monel 400 / K400
UNS N04400
EN / DIN 2.4360
JIS NCF400
BS NA
ISO NiCu 30-70

Dimension & Weight Chart (Selected common sizes)

Below is a representative chart showing outside diameter, wall thickness, inside diameter, cross-sectional area of metal and calculated weight per metre (kg/m). Values are calculated using density = 7.93 g/cm³ and are for guidance — use actual MTC values for procurement & engineering.

Size (inch) Outside Diameter (mm) Schedule Wall Thickness (mm) Weight per Meter (kg)
1/2" 21.3 40 2.77 0.52
3/4" 26.7 40 2.87 0.78
1" 33.4 40 3.38 1.12
1 1/2" 48.3 40 4.55 2.05
2" 60.3 40 5.54 3.05
3" 88.9 40 7.11 5.75
4" 114.3 40 7.62 8.64
6" 168.3 40 9.27 16.12
8" 219.1 40 9.53 23.76

Types Of Monel 400 K400 Pipe Fittingss and Fittingss

Seamless Pipe

SS S32760 Seamless Pipe

Welded Pipe

SS S32760 Welded Pipe

ERW Pipe

SS S32760 ERW Pipe

EFW Pipe

SS S32760S EFW Pipe

Seamless Fittings

Low Temperature Carbon Steel A333S Seamless Fittings

Welded Fittings

S32760H Super Duplex Steel Welded Fittings

Capillary Fittings

S32760 Super Duplex Steel Capillary Fittings

Heat Exchanger Fittingss

S32760H Super Duplex Steel Heat Exchanger Fittingss

Frequently Asked Questions (FAQ)

1. What is Monel 400 (K400)?

Monel 400, also known as K400, is a Nickel-Copper alloy known for its excellent corrosion resistance in seawater and chemical environments. It is widely used in pipe fittings, flanges, elbows, and tees.

2. What are the typical applications of Monel 400 pipe fittings?

Monel 400 pipe fittings are commonly used in chemical processing, marine, offshore, desalination plants, and heat exchangers due to their high corrosion resistance and durability.

3. What standards do Monel 400 / K400 pipe fittings comply with?

They generally comply with ASTM B366, ASTM B164, ASME SB366, and international equivalents such as UNS N04400 and EN 2.4360.

4. What is the temperature range of Monel 400 pipe fittings?

Monel 400 fittings can operate in a temperature range of approximately -200°C to 982°C (-328°F to 1800°F).

5. Are Monel 400 pipe fittings resistant to corrosion?

Yes, they offer excellent resistance to corrosion in seawater, hydrofluoric acid, alkalis, and other harsh chemical environments.

Pipes & Fittingss Supplier

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