Monel 400 Pipes & Tubes are constructed using a high-performance nickel-copper alloy, which is well known for its exemplary corrosion resistance properties even in harsh environments. This particular nickel-copper alloy is highly sought after to be used under sea conditions, chemicals, as well as for applications involving high seawater, high-temperature steam, and high-concentration solutions consisting of salt, among others. These Pipes & Tubes retain their strength even under sub-zero temperatures; hence, suitable for applications involving high temperatures up to 1000�F. As far as their properties go, these Pipes & Tubes can just be hardened through cold working.
Monel 400 Pipes and Tubes are made mainly of nickel and copper with restricted content of iron, manganese, carbon and silicon to increase strength, toughness and weldability. The alloy has low corrosion rates in fast moving sea water and is highly resistant to stress corrosion cracking, especially in fresh water and non-oxidizing chloride conditions. Due to these characteristics, Monel 400 Seamless, Welded, and ERW Pipes are widely applicable to marine engineering, heat exchangers, oil and gas systems, chemical processing equipment and desalination plants. Besides, Monel 400 is very resilient to de-aerated hydrochloric and hydrofluoric acids, and hence can be used extensively in chemical industries. Monel 400 Pipes and Tubes is an excellent choice in critical applications in industrial processes because of its combination of durability, resistance to corrosion and flexibility during fabrication.
Table of Contents
- Specifications of Monel 400 Pipe & Tube
- Grade 400 Monel Pipes & Tubes Chemical Composition
- Monel Alloy 400 Pipe & Tube Mechanical Properties
- Alloy 400 Pipes and Tubes Equivalent Grades
- Monel 400 Pipe Pressure Rating Chart
- Types of Monel 400 Pipes & Tubes
- Manufacturing Process of Monel 400 Pipes &Tubes
- Applications Usage of Alloy 400 Pipes & Tubes
- Frequently Asked Questions (FAQs)
Specifications of Monel 400 Pipe & Tube
| Parameter | Details & Specifications |
| Industry Standards | ASTM, ASME, and API |
| Seamless Standards | ASTM B165 / ASME SB165 |
| Welded Standards | ASTM B725, B730 / ASME SB725, SB730 |
| Manufacturing Type | Seamless, ERW (Electric Resistance Welded), Welded, Fabricated |
| Nominal Pipe Size (NPS) | 15 mm NB to 150 mm NB (1/2" to 6") |
| Large Diameter Range | 7" (193.7 mm OD) to 20" (508 mm OD) |
| Outer Diameter (OD) | 1.250" � 6.000" (30 � 150 mm) |
| Wall Thickness Range | 0.095" � 1.000" (2.5 � 25 mm) |
| Pipe Schedules | SCH 20, 30, 40, STD, 60, 80, XS, 100, 120, 140, 160, XXS |
| Length Options | Single Random, Double Random, Cut Length, or Custom |
Grade 400 Monel Pipes & Tubes Chemical Composition
| Grade | C (%) | Mn (%) | Si (%) | S (%) | Cu (%) | Fe (%) | Ni (%) |
| Monel 400 | 0.30 max | 2.00 max | 0.50 max | 0.024 max | 28.00 - 34.00 | 2.50 max | 63.00 min |
Monel Alloy 400 Pipe & Tube Mechanical Properties
| Property | Density | Melting Point | Tensile Strength | Yield Strength (0.2% Offset) | Elongation |
| Monel 400 | 8.8 g/cm^3 | 1350 �C (2460 �F) | 80,000 psi / 550 MPa | 35,000 psi / 240 MPa | 40\% |
Alloy 400 Pipes and Tubes Equivalent Grades
| Standard | UNS | Werkstoff Nr. | JIS (JP) | AFNOR (FR) | BS (UK) | GOST (RU) | EN (EU) |
| Monel 400 | N04400 | 2.4360 | NW 4400 | NU-30M | NA 13 | ????? 28-2.5-1.5 | NiCu30Fe |
Monel 400 Pipe Pressure Rating Chart
| Tube O.D. (in) | .028 | .035 | .049 | .065 | .083 | .095 | .109 | .120 |
| 1/8 | 7900 | 10100 | � | � | � | � | � | � |
| 1/4 | 3700 | 4800 | 7000 | 9500 | � | � | � | � |
| 5/16 | � | 3700 | 5400 | 7300 | � | � | � | � |
| 3/8 | � | 3100 | 4400 | 6100 | � | � | � | � |
| 1/2 | � | 2300 | 3200 | 4400 | � | � | � | � |
| 3/4 | � | � | 2200 | 3000 | 4000 | 4600 | � | � |
| 1 | � | � | � | 2200 | 2900 | 3400 | 3900 | 4300 |
Types of Monel 400 Pipes & Tubes
Coiled & Capillary Tube
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Heat Exchanger Tubes (ASTM B163)
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Seamless Pipes & Tubes (ASTM B165)
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Welded & ERW Pipes (ASTM B725)
Manufacturing Process of Monel 400 Pipes & Tubes
The Monel 400 pipes are put together in a controlled and precise process so that they are highly resistant to corrosion, particularly in the marine and chemical environments. It has an excellent nickel-copper alloy that helps in giving it high strength, endurance, and performance over a wide temperature range.
- Raw Material Selection
Nickel and copper are chosen as the main components, and the concentrations of iron and manganese are strictly regulated to obtain the necessary composition of the chemical elements and resistance to corrosion. - Melting and Alloying
High technology procedures like electric arc furnace or vacuum induction melting are employed to melt the chosen raw materials. This guarantees a homogenous structure of alloy, minimum impurities and standard mechanical characteristics. - Hot Working and Forming
The molten alloy is poured into billets and it is taken through the hot working processes. Extrusion, rolling, or pilgering is used to achieve the accuracy of dimensions, wall thickness and structural uniformity of pipes and tubes. - Heat Treatment
Solution annealing can be done to eliminate internal stress, enhance ductility, and corrosion resistance. Cooling is done in a controlled way and it is used to sustain the intended metallurgical structure. - Last Process and Quality Control
The last processes are straightening, cutting, finishing the surface, and extensive testing. Non-destructive testing, dimensional inspection and chemical analysis are done to confirm to international standards and performance standards.
Applications Usage of Monel 400 Pipes & Tubes
Monel 400 pipes and tubes have been extensively used in industries with high levels of resistance to corrosion, erosion and even high temperatures. They are reliable and have a long service life which makes them suitable for critical applications.
- Seawater and Marine
Widely applied in piping systems in seawater, shipbuilding, heat exchangers and marine hardware since it is highly resistant to corrosion and biofouling in saltwater. - Chemical Processing
They are used in alkylation units, acid handling systems, and chemical transfer lines where acid resistance, alkali resistance, and corrosive chemical resistance is necessary. - Oil and Gas Industry
Applied in offshore platforms, piping system and refinery units where sour gas, chlorides and high-pressure resistance are needed. - Heat Exchangers and Power Generation
Applied in condenser tubes, heat exchangers and boiler feed systems due to excellent thermal conductivity and ability to resist corrosion at high temperatures. - Engineering and Aerospace
Applied in hydraulic lines, fuel systems and precision engineering parts because of high levels of strength, toughness and stability in different temperatures. - Industrial Valves and Equipment
It is widely used in pumps, valves, shafts, and fittings when durability, corrosion resistance, and long-term reliability are of the essence.
Frequently Asked Questions (FAQs)
Monel 400 pipes and tubes are nickel-copper alloy products known for excellent corrosion resistance and high strength.
Yes, Monel 400 performs very well in seawater and marine environments due to its strong resistance to saltwater corrosion.
Yes, Monel 400 can be welded using standard welding methods without special heat treatment.
Monel 400 pipes can operate in temperatures ranging from sub-zero conditions up to about 1000�F (538�C).
They are available in a wide range of diameters, wall thicknesses, and schedules to meet different industrial requirements.
Monel 400 offers excellent corrosion resistance, while Monel K-500 provides higher strength due to added aluminum and titanium.
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