Monel 400 Pipes and Tubes Manufacturer in India
Monel 400 Pipes and Tubes Manufacturer in India
Sachiya Steel International is a leading Monel 400 Pipes and Tubes Manufacturer in India, established in 2005 and headquartered in Mumbai. With 20+ years of industry experience, we manufacture, supply, and export industrial pipes and tubes for demanding engineering applications. Monel 400 (UNS N04400) is a nickel-copper alloy known for its strength and resistance to corrosion in marine environments, chemical processing systems, and other industrial applications. We supply seamless and welded pipes and tubes for projects requiring reliable material performance.
Our products serve customers in oil and gas, chemical processing, marine engineering, desalination, and power generation industries. Supported by ISO 9001:2015, ISO 14001:2015, ISO 45001:2018, and applicable PED and TÜV approvals, we focus on product quality, material traceability, and technical compliance. We serve customers across 85+ countries, handling standard orders, bulk requirements, and project-specific specifications with dependable supply and export support.
What Are Monel 400 Pipes and Tubes?
Monel 400 Pipes and Tubes are seamless or welded products made from UNS N04400, a nickel-copper alloy known for its strength and corrosion resistance. Also identified by the material designation 2.4360, Monel 400 is used in marine engineering, chemical processing, oil and gas, and desalination applications. Pipes are generally specified by nominal pipe size and schedule, while tubes are specified by their outside diameter and wall thickness. These differences help buyers select suitable products for fluid transport, heat exchangers, condensers, and instrumentation systems.
Nickel provides toughness and resistance to caustic alkalis and chloride stress corrosion cracking, while copper improves resistance to seawater and certain non-oxidising acids, including hydrofluoric acid. Monel 400 also offers good workability and weldability and cannot be hardened through conventional heat treatment. It performs well in many marine and chemical environments, although suitability depends on the concentration, temperature, and conditions of the service medium. Strongly oxidising environments may require a different alloy.
Monel 400 Pipes and Tubes
Corrosion-resistant Monel 400 pipes and tubes designed for demanding applications across marine, chemical processing, oil and gas, power generation, heat exchangers and industrial engineering. Available in multiple sizes, wall thicknesses and manufacturing specifications.
Types of Monel 400 Pipes and Tubes
Our range of Monel 400 Pipes and Tubes covers different forms, manufacturing methods and sizes for seawater and acid service. We supply the following types:
- Monel 400 Seamless Pipes: made to ASTM B165 with no weld seam, for pressure and critical lines.
- Monel 400 Welded Pipes: made to ASTM B725 from plate or strip, for larger diameters and lower cost.
- Monel 400 Seamless Tubes: made to ASTM B163 or B165 for heat exchangers, condensers and coolers.
- Monel 400 Welded Tubes: formed from strip and welded for lighter-duty tube applications.
- Heat Exchanger and Condenser Tubes: straight tubes sized for tube sheets, and U-bend tubes to drawing.
- Instrumentation Tubes: small-bore tubes for sampling, gas and control lines.
- Cold-Drawn Pipes and Tubes: closer dimensional control and a smoother surface.
- Hot-Finished Pipes: suited to larger diameters and heavier walls.
- Annealed and Pickled Products: heat treated and cleaned for service.
- Thin-Wall and Heavy-Wall Pipes: Sch 10S to Sch 80S, matched to design pressure.
- Plain-End and Bevelled-End Pipes: end preparation ready for butt welding.
As a Monel 400 Pipes and Tubes Manufacturer, we supply these types in the required form, size, wall and finish.
Seamless, Welded, Heat Exchanger and Instrumentation Monel 400 Pipes and Tubes Manufacturers and Suppliers in India
We manufacture and supply Monel 400 Pipes and Tubes in seamless and welded form, from small instrument tube to large process pipe. The form follows the pressure, the size and the duty.
- Seamless Monel 400 pipes (ASTM B165): the standard choice for pressure duty, hydrofluoric acid lines and critical seawater circuits.
- Welded Monel 400 pipes (ASTM B725): lower cost and shorter lead time, with larger diameters and even walls.
- Seamless Monel 400 tubes (ASTM B163, B165): for condensers, feedwater heaters and shell-and-tube exchangers.
- Heat exchanger tubes: straight and U-bend tubes to your bundle drawing, in BWG or metric walls.
- Instrumentation tubes: small-bore, thin-wall tubes for gas, sample and control lines.
- Large-diameter welded pipes: diameters above the practical range of seamless pipe.
These products are available in different outside diameters, wall thicknesses, lengths and end finishes according to the required specification.
Types of Pipes & Tubes
Explore our range of industrial pipes and tubes, manufactured for different applications, materials, specifications and engineering requirements.
Pipes and Tubes
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Seamless Pipes
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ERW Pipes
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LSAW Pipes
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SSAW Pipes
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Seamless Tubes
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Welded Pipes
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Welded Tubes
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Box Pipes
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Box Tubes
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Brass Pipes
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Heat Exchanger Tubes
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Boiler Tubes
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Aluminium Pipes
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Carbon Steel Seamless Pipes
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Carbon Steel Pipe
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Stainless Steel Pipe
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Alloy Steel Pipe
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Duplex Steel Pipe
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Super Duplex Steel Pipe
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Nickel Alloy Pipe
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Copper Nickel Alloy Pipe
→Get Certified Monel 400 Pipes and Tubes at Competitive Factory Prices
Monel 400 Pipes and Tubes Specification
| Item | Detail |
|---|---|
| Product | Monel 400 Pipes and Tubes |
| Grade | Monel 400 (UNS N04400, 2.4360, NiCu30Fe) |
| Process | Seamless (hot finished or cold drawn) or welded, then annealed |
| Pipe standards | ASTM B165 / ASME SB-165 (seamless), ASTM B725 / ASME SB-725 (welded) |
| Tube standards | ASTM B163 / ASME SB-163, ASTM B165, ASTM B730 (welded) |
| General requirements | ASTM B829 (seamless), ASTM B775 (welded pipe) |
| Pipe dimensions | ASME B36.19M (Sch 10S, 40S, 80S), ASME B36.10M |
| Tube dimensions | OD and wall in mm or BWG, as per drawing |
| Size reference | Pipe NPS 1/2 to 12 and tube OD 12.7 to 50.8 mm in the tables, other sizes on request |
| Length | Single random, double random, fixed or cut length |
| Ends | Plain or bevelled (pipes), plain and deburred (tubes) |
| Heat treatment | Annealed |
| Surface | Pickled, or bright annealed for tubes |
| Tests | Chemical analysis, tensile, flattening, flaring (tubes), hydrostatic or eddy current test |
| Certificate | EN 10204 3.1 with every order, 3.2 on request |
| Inspection | Third-party inspection on request |
Monel 400 Pipes and Tubes Standards and Specifications
Monel 400 pipe and tube are bought to an alloy-specific standard, with matching fitting, plate and design standards behind them. The table links each one to its job.
| Standard | Covers | Applies to |
|---|---|---|
| ASTM B165 / ASME SB-165 | Seamless nickel-copper alloy (UNS N04400) pipe and tube | Seamless pipes and tubes |
| ASTM B725 / ASME SB-725 | Welded nickel and nickel-copper alloy pipe | Welded pipes |
| ASTM B730 | Welded nickel and nickel-copper alloy tube | Welded tubes |
| ASTM B163 / ASME SB-163 | Seamless nickel and nickel alloy condenser and heat-exchanger tube | Exchanger and condenser tubes |
| ASTM B829 | General requirements for seamless nickel and nickel alloy pipe and tube | Tolerances and test rules, seamless |
| ASTM B775 | General requirements for welded nickel and nickel alloy pipe | Tolerances and test rules, welded pipe |
| ASTM B366 | Factory-made wrought nickel and nickel alloy fittings | Matching butt-weld fittings (WPNICU) |
| ASTM B564 | Nickel alloy forgings | Matching flanges and forged fittings |
| ASTM B127, B164 | Monel 400 plate, sheet, strip, rod, bar and wire | Matching plate and bar |
| ASME B36.19M and B36.10M | Pipe dimensions and weights | OD and wall reference |
| TEMA | Heat exchanger design and tube dimensions | Shell-and-tube exchangers |
| EN 10204 | Types of inspection documents | 3.1 and 3.2 certificates |
Monel 400 Pipes and Tubes Material and Grades
Monel 400 is the standard nickel-copper grade, and related alloys are listed for reference. The table gives their UNS and EN numbers.
| Grade | UNS | EN number | Name | Typical use |
|---|---|---|---|---|
| Monel 400 | N04400 | 2.4360 | NiCu30Fe | Seawater, hydrofluoric acid, caustic, feedwater heaters |
| Monel K-500 (for reference) | N05500 | 2.4375 | NiCu30Al3Ti | Age-hardened shafts and fasteners |
| Nickel 200 (for reference) | N02200 | 2.4066 | Ni 99.2 | Caustic soda and high-purity chemicals |
| Cu-Ni 70/30 (for reference) | C71500 | CW354H | CuNi30Mn1Fe | Seawater cooling lines |
What Is the Difference Between Monel 400 Pipes and Tubes and Cu-Ni 70/30 Pipes & Tubes?
The short answer: Monel 400 is a nickel-copper alloy with more nickel and higher strength, while Cu-Ni 70/30 is a copper-based alloy that costs less and resists marine growth. Use Monel 400 where hydrofluoric acid, caustic or high strength matter, and Cu-Ni 70/30 for seawater cooling where cost matters.
| Point | Monel 400 Pipes and Tubes | Cu-Ni 70/30 Pipes & Tubes |
|---|---|---|
| UNS | N04400 | C71500 |
| Nickel | 63.0% min | 29.0–33.0% |
| Copper | 28.0–34.0% | Balance, 65% min |
| Tensile strength, annealed | 485 MPa | 360 MPa |
| Hydrofluoric acid | Excellent | Limited |
| Caustic and alkalis | Excellent | Moderate |
| Seawater | Excellent, but fouls | Excellent, resists fouling |
| Marine growth resistance | Low | Good |
| Cost | Higher | Lower |
| Common standards | ASTM B165, B725, B163 | ASTM B466, B467 |
| Typical use | HF alkylation, chemical plants, feedwater heaters | Ships, offshore seawater cooling |
Monel 400 Pipes and Tubes Chemical Composition
Chemistry gives Monel 400 its resistance to seawater and hydrofluoric acid. The table shows the ASTM B165 limits, one element per row. Values are percentage by weight, maximum unless shown as a range or marked "min".
| Element | Monel 400 (UNS N04400) | Role in the alloy |
|---|---|---|
| Nickel (Ni, incl. Co) | 63.0 min | Toughness, caustic and chloride resistance |
| Copper (Cu) | 28.0–34.0 | Seawater and hydrofluoric acid resistance |
| Iron (Fe) | 2.5 | Strength and corrosion resistance |
| Manganese (Mn) | 2.0 | Deoxidiser and strength |
| Carbon (C) | 0.30 | Kept low for formability |
| Silicon (Si) | 0.50 | Deoxidiser |
| Sulphur (S) | 0.024 | Impurity limit |
Monel 400 Pipes and Tubes Mechanical Properties
Monel 400 pipes and tubes are supplied annealed. The table gives minimum values under ASTM B165, with typical physical data.
| Property | Value |
|---|---|
| Tensile strength, min | 485 MPa (70 ksi) |
| Yield strength 0.2%, min | 195 MPa (28 ksi) |
| Elongation, min | 35% |
| Density | 8.80 g/cm³ |
| Melting range | 1300–1350 °C |
| Thermal conductivity at 100 °C | About 22 W/m·K |
| Modulus of elasticity | 179 GPa |
Monel 400 Pipes and Tubes Size and Weight Chart
Weight depends on OD and wall thickness. Monel 400 has a density of about 8.80 g/cm³, so we use this formula for both pipes and tubes:
OD and wall are in mm. Example: NPS 2 Sch 40S pipe is (60.3 − 3.91) × 3.91 × 0.02765 = 6.10 kg/m. Multiply by length for total weight. Pipe walls are listed in the next section.
Pipes
| NPS | OD (mm) | Sch 10S (kg/m) | Sch 40S (kg/m) | Sch 80S (kg/m) |
|---|---|---|---|---|
| 1/2" | 21.3 | 1.12 | 1.42 | 1.81 |
| 1" | 33.4 | 2.35 | 2.81 | 3.63 |
| 2" | 60.3 | 4.41 | 6.10 | 8.39 |
| 3" | 88.9 | 7.24 | 12.66 | 17.13 |
| 4" | 114.3 | 9.38 | 18.02 | 25.03 |
| 6" | 168.3 | 15.50 | 31.69 | 47.72 |
| 8" | 219.1 | 22.39 | 47.71 | 72.48 |
| 10" | 273.1 | 31.15 | 67.62 | 91.44 |
| 12" | 323.9 | 40.35 | 82.84 | 109.28 |
Tubes
| OD (in) | OD (mm) | 18 BWG, 1.24 mm (kg/m) | 16 BWG, 1.65 mm (kg/m) | 14 BWG, 2.11 mm (kg/m) |
|---|---|---|---|---|
| 1/2" | 12.70 | 0.393 | 0.504 | 0.618 |
| 5/8" | 15.88 | 0.502 | 0.649 | 0.803 |
| 3/4" | 19.05 | 0.611 | 0.794 | 0.988 |
| 1" | 25.40 | 0.828 | 1.084 | 1.359 |
| 1-1/4" | 31.75 | 1.046 | 1.373 | 1.729 |
| 1-1/2" | 38.10 | 1.264 | 1.663 | 2.100 |
| 2" | 50.80 | 1.699 | 2.242 | 2.841 |
Available Sizes, Dimensions and Schedules
Monel 400 pipes follow ASME B36.19M for Sch 10S, 40S and 80S, and tubes are ordered by OD and wall in mm or BWG. A schedule is a wall-thickness code, so for the same OD a higher number means a thicker wall. A higher BWG number means a thinner tube wall. Other sizes and walls can be quoted on request. Confirm the wall against the design code and your corrosion allowance.
| NPS | OD (mm) | Sch 10S (mm) | Sch 40S (mm) | Sch 80S (mm) |
|---|---|---|---|---|
| 1/2" | 21.3 | 2.11 | 2.77 | 3.73 |
| 1" | 33.4 | 2.77 | 3.38 | 4.55 |
| 2" | 60.3 | 2.77 | 3.91 | 5.54 |
| 3" | 88.9 | 3.05 | 5.49 | 7.62 |
| 4" | 114.3 | 3.05 | 6.02 | 8.56 |
| 6" | 168.3 | 3.40 | 7.11 | 10.97 |
| 8" | 219.1 | 3.76 | 8.18 | 12.70 |
| 10" | 273.1 | 4.19 | 9.27 | 12.70 |
| 12" | 323.9 | 4.57 | 9.53 | 12.70 |
Tube walls run from 18 BWG (1.24 mm) to 14 BWG (2.11 mm) in the table above, and other walls can be quoted on request. Tolerances on OD, wall and length follow ASTM B829 and the product standard, and TEMA covers exchanger tube dimensions. Tell us if your drawing calls for closer limits.
Common Materials in Monel 400 Pipes and Tubes
We manufacture and supply the commonly specified materials used in Monel 400 Pipes and Tubes, together with the materials that match them in a piping or exchanger system.
UNS N04400 (2.4360): Monel 400, with about 63% nickel and 31% copper, the base alloy for pipes and tubes.
WPNICU fittings: matching butt-weld fittings in Monel 400 to ASTM B366.
ASTM B564 flanges and forgings: forged flanges and fittings in the same alloy.
ASTM B127 plate and B164 rod and bar: matching plate, sheet, rod and bar for fabricated parts and tubesheets.
ERNiCu-7 and ENiCu-7 weld filler: matching filler for joining Monel 400 on site.
These materials form part of our supply range as Monel 400 Pipes and Tubes Suppliers, with different sizes, walls and finishes available according to the required specification.
Monel 400 Pipes and Tubes We Manufacture and Supply
We make Monel 400 Pipes and Tubes for the jobs below. The form and wall follow the fluid and the pressure.
| Service | Typical form | Typical size |
|---|---|---|
| Hydrofluoric acid alkylation lines | Seamless pipe | NPS 1/2 to 6, Sch 40S to 80S |
| Seawater cooling and fire mains | Seamless or welded pipe | NPS 2 to 12, Sch 10S to 40S |
| Feedwater heaters and condensers | Seamless tube | OD 15.88 to 25.4 mm, 16 to 18 BWG |
| Shell-and-tube heat exchangers | Seamless tube, straight or U-bend | OD 19.05 to 38.1 mm, 14 to 18 BWG |
| Caustic and chemical process lines | Seamless or welded pipe | NPS 1 to 8, Sch 10S to 40S |
| Instrument and sampling lines | Seamless tube | OD 6.35 to 12.7 mm |
Applications of Monel 400 Pipes and Tubes
- Oil refineries: hydrofluoric acid alkylation units and crude overhead systems.
- Chemical processing: hydrofluoric acid, dilute sulphuric acid and caustic soda lines.
- Marine and offshore: seawater cooling, firewater and ballast lines.
- Desalination plants: brine heaters and seawater circuits.
- Power generation: feedwater heaters and condenser tubes.
- Petrochemical plants: heat exchangers and process coolers.
- Salt and chlor-alkali plants: brine and caustic handling.
- Fertiliser plants: acid and alkali process lines.
- Shipbuilding: engine cooling and seawater service systems.
Why Choose Us as Your Monel 400 Pipes and Tubes Manufacturer in India?
With 20+ years of experience in the industrial pipes and tubes industry, we understand the material requirements of projects involving nickel alloys and corrosion-resistant piping. Our manufacturing and sourcing capabilities support Monel 400 Pipes and Tubes in different outside diameters, wall thicknesses, and lengths to meet customer specifications. We handle standard orders, bulk requirements, and project-specific needs for marine engineering, refineries, chemical processing, and other industrial applications. Popular sizes may be available from ready stock, subject to availability.
Our quality management systems include ISO 9001:2015, ISO 14001:2015, and ISO 45001:2018 certifications, along with applicable PED 2014/68/EU and TÜV approvals. We provide EN 10204 3.1 material test certificates according to order requirements, while 3.2 certification and third-party inspection can be arranged upon request. Based in Mumbai, we serve customers across 85+ countries and support export packing, documentation, and shipment coordination to help meet domestic and international project requirements.
Countries We Export Monel 400 Pipes and Tubes To
Our Monel 400 Pipes and Tubes are supplied from India to 85+ countries, with export orders covering refinery, marine, desalination and chemical projects. We work with international specifications and arrange the required material documentation, inspection and shipment details for each order.
Middle East: UAE, Saudi Arabia, Qatar, Oman, Kuwait and Bahrain
Europe: Germany, Italy, United Kingdom, Netherlands, France, Norway and Spain
Asia-Pacific: Singapore, Malaysia, Indonesia, Thailand, Vietnam, South Korea, Japan and Australia
North and South America: USA, Canada, Mexico and Brazil
Africa: South Africa, Nigeria, Egypt and Kenya
For overseas requirements, EN 10204 3.1 certification is supplied with every order. EN 10204 3.2 certification and third-party inspection can be arranged when specified. Export packing and shipping documentation are handled according to the order and destination, supporting the movement of Monel 400 pipes and tubes from India to international project locations.