Monel 400/K500 Seamless Pipes Manufacturer in India
Monel 400/K500 Seamless Pipes Manufacturer in India
Stainless Steel Pipe Manufacturers is a trusted Alloy Steel Seamless Pipes Manufacturer in India, supplying industrial pipes and tubes for high-temperature, high-pressure, and demanding engineering applications. Established in 2005, we manufacture, supply, and export alloy steel piping solutions for oil and gas, petrochemical, chemical, and power generation industries. We serve customers across 85+ countries, supporting standard orders and bulk project requirements with a focus on quality and dependable supply.
We offer alloy steel seamless pipes in various grades, sizes, wall thicknesses, and schedules, subject to manufacturing and stock availability. Our products are supplied according to applicable ASTM and ASME specifications, with material test certificates to EN 10204 3.1 and 3.2 certificates available on request. Supported by ISO 9001:2015, ISO 14001:2015, ISO 45001:2018, and applicable TÜV approvals, we prioritize material traceability, inspection, and technical compliance. Third-party inspection can also be arranged on request to meet project-specific requirements.
What Are Monel 400/K500 Seamless Pipes?
Monel 400/K500 Seamless Pipes are nickel-copper alloy pipes manufactured without a longitudinal welded seam, offering excellent corrosion resistance and reliable performance in demanding industrial environments. Monel 400 provides good resistance to seawater, marine atmospheres, and various chemical solutions, while Monel K500 combines similar corrosion resistance with higher strength and hardness through age hardening.
These pipes are used in marine engineering, chemical processing, oil and gas, offshore equipment, and other applications requiring durable materials. Monel 400 is commonly identified by UNS N04400, while Monel K500 is identified by UNS N05500. Depending on the product form and application, relevant material specifications may include ASTM B165 for nickel-copper alloy seamless pipe and tube. The appropriate grade should be selected according to operating conditions, pressure, temperature, dimensions, and applicable project requirements.
Monel 400/K500 Seamless Pipes
High-quality Monel 400/K500 seamless pipes manufactured for demanding applications across chemical, petrochemical, oil and gas, marine, power generation and engineering industries. Available in multiple grades, sizes, wall thicknesses and ASTM specifications.
Types of Monel 400/K500 Seamless Pipes
Monel 400/K500 Seamless Pipes are available in different alloy grades, heat-treatment conditions, manufacturing finishes, and wall thicknesses for various industrial applications.
- Monel 400 Annealed Pipes: Offer good ductility and formability for marine, chemical, and industrial piping systems.
- Monel 400 Stress-Relieved Pipes: Undergo stress-relief treatment when specified to reduce residual stresses after cold working.
- Monel K500 Annealed Pipes: Provide a suitable starting condition for machining or forming before age-hardening treatment.
- Monel K500 Age-Hardened Pipes: Deliver higher strength and hardness through controlled age-hardening treatment.
- Hot-Finished Seamless Pipes: Manufactured through hot-working processes for a range of pipe dimensions and wall thicknesses.
- Cold-Drawn Seamless Pipes: Provide closer dimensional control and a smoother surface finish where required.
- Light-Wall Pipes: Available in suitable light-wall dimensions, including Schedule 10S where applicable.
- Standard and Heavy-Wall Pipes: Available in suitable Schedule 40S and Schedule 80S dimensions, depending on size and specification.
- Pickled Pipes with Plain or Bevelled Ends: Supplied with specified surface cleaning and end preparation for fabrication and welding.
A reliable Monel 400/K500 Seamless Pipes Manufacturer offers suitable material grades, finishes, and dimensions according to applicable standards and industrial requirements.
UNS N04400 and N05500 Monel 400/K500 Seamless Pipes Manufacturers and Suppliers in India
Monel 400/K500 Seamless Pipes are available in UNS N04400 and UNS N05500 grades, also known as Alloy 400 and Alloy K-500, with EN material numbers 2.4360 and 2.4375, respectively. Monel 400 offers excellent resistance to seawater, brine, hydrofluoric acid, and caustic environments, while Monel K500 provides higher strength and hardness through age-hardening treatment. These nickel-copper alloy pipes are suitable for marine engineering, chemical processing, offshore installations, and oil and gas applications.
Monel 400 Seamless Pipes are available in popular sizes from ready stock, subject to availability, while Monel K500 pipes and other dimensions can be arranged to order. Products are supplied according to applicable material specifications, with EN 10204 Type 3.1 certificates provided with every order and Type 3.2 certificates available on request. Third-party inspection can also be arranged upon request. Grade selection, dimensions, and applicable standards can be confirmed according to specific project requirements to ensure the correct material specification.
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Monel 400/K500 Seamless Pipes Specification
The table sums up how we describe a Monel 400/K500 Seamless Pipes order.
| Item | Detail |
|---|---|
| Product | Monel 400/K500 Seamless Pipes |
| Alloys | Alloy 400 (UNS N04400, 2.4360), Alloy K500 (UNS N05500, 2.4375) |
| Method | Seamless, hot finished or cold drawn |
| Pipe standards | ASTM B165 / ASME SB165 (Alloy 400), ASTM B829 (general requirements), DIN 17751 |
| K500 supply | Made to order to the agreed specification, with the chemistry of N05500 |
| Size basis | NPS and schedule, or OD and wall in mm |
| Size range shown | NPS 1/2 to 12, other sizes on request |
| Schedules | Sch 10S, 40S, 80S; other walls on request |
| Lengths | Single random, double random or cut length |
| Ends | Plain or bevelled |
| Condition | Annealed, stress relieved, or age hardened (K500) |
| Surface | Pickled |
| Tests | Chemical analysis, tensile, flattening or flaring, 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/K500 Seamless Pipes Standards and Specifications
Nickel-copper pipe is bought to a pipe standard, a general requirements standard and, for oil and gas, a sour-service standard. The table shows how each is used.
| Standard | What it covers | Where it applies |
|---|---|---|
| ASTM B165 / ASME SB165 | Seamless nickel-copper alloy (N04400) pipe and tube | Alloy 400 pipe |
| ASTM B163 | Seamless nickel and nickel-alloy condenser and heat exchanger tubes | Alloy 400 exchanger tubes |
| ASTM B829 | General requirements for seamless nickel and nickel-alloy pipe and tube | Tolerances, tests, marking |
| DIN 17751 | Tubes of nickel and nickel alloys | European specifications |
| ASME B36.19M and B36.10M | Pipe dimensions and weights | OD and wall by schedule |
| ASME B16.25 | Butt-welding ends | Bevel angle and root face |
| NACE MR0175 / ISO 15156 | Materials for sour service | Oil and gas projects |
| ASME B31.3 | Process piping design code | Wall and allowable stress by your engineer |
| EN 10204 | Types of inspection documents | 3.1 and 3.2 certificates |
Monel 400/K500 Seamless Pipes Material and Grades
The two alloys share a base, but they are bought for different reasons. The table sets them side by side.
| Property | Alloy 400 | Alloy K500 |
|---|---|---|
| UNS | N04400 | N05500 |
| EN / Werkstoff number | 2.4360 (NiCu30Fe) | 2.4375 (NiCu30Al3Ti) |
| Strengthening | Cold work | Age hardening |
| Strength | Moderate | Much higher after aging |
| Corrosion resistance | Excellent in seawater, HF, caustic | Close to Alloy 400 |
| Density | 8.80 g/cm³ | 8.44 g/cm³ |
| Typical use | Piping, tubing, heat exchangers | Shafts, fasteners, high-strength parts |
What Is the Difference Between Monel 400/K500 Seamless Pipes and Copper Nickel Seamless Pipes?
The short answer: Monel 400 and K500 are stronger than copper nickel, resist hydrofluoric acid and fast-flowing seawater far better and cost more. Copper nickel resists marine fouling and is cheaper, so it suits ordinary seawater piping. Choose nickel-copper for severe duty and copper nickel for routine seawater service.
| Factor | Monel 400/K500 Seamless Pipes | Copper Nickel Seamless Pipes (90/10, 70/30) |
|---|---|---|
| Base | About 63% nickel, 28 to 34% copper | 70 to 90% copper, 10 to 30% nickel |
| Strength | Higher, much higher in K500 | Lower |
| Seawater velocity limit | High | About 3.5 to 4.5 m/s |
| Marine fouling | Prone to growth | Resists growth |
| Hydrofluoric acid | Excellent resistance | Poor |
| Caustic and brine | Excellent | Good |
| Cost | Higher | Lower |
| Typical use | HF units, severe seawater, sour service | Ships, coastal cooling, desalination |
Monel 400/K500 Seamless Pipes Chemical Composition
Chemistry sets corrosion resistance and, in K500, the ability to age harden. The table shows the main elements. Values are percentage by weight, maximum unless shown as a range. A dash means no limit is set.
| Element | Alloy 400 (N04400) | Alloy K500 (N05500) |
|---|---|---|
| Nickel (Ni, incl. Co) | 63.0 min | 63.0 min |
| Copper (Cu) | 28.0–34.0 | 27.0–33.0 |
| Aluminium (Al) | — | 2.30–3.15 |
| Titanium (Ti) | — | 0.35–0.85 |
| Iron (Fe) | 2.5 | 2.0 |
| Manganese (Mn) | 2.0 | 1.5 |
| Carbon (C) | 0.30 | 0.25 |
| Silicon (Si) | 0.50 | 0.50 |
| Sulphur (S) | 0.024 | 0.01 |
Monel 400/K500 Seamless Pipes Mechanical Properties
Alloy 400 is sold in the annealed condition for most pipe. K500 gets most of its strength from age hardening, so its properties depend on heat treatment. The first table gives the ASTM B165 minimums for annealed Alloy 400.
| Alloy and condition | Tensile min, MPa (ksi) | Yield min, MPa (ksi) | Elongation min (%) |
|---|---|---|---|
| Alloy 400, annealed | 485 (70) | 195 (28) | 35 |
For K500, typical annealed tensile strength is about 650 MPa. After age hardening, it typically rises above 1,000 MPa. The test results on your certificate show the actual values for the condition supplied. The second table gives typical physical properties.
| Property | Alloy 400 | Alloy K500 |
|---|---|---|
| Density | 8.80 g/cm³ | 8.44 g/cm³ |
| Melting range | 1300–1350°C | 1315–1350°C |
| Thermal conductivity | About 22 W/m·K | About 17.5 W/m·K |
| Thermal expansion (20–100°C) | About 13.9 µm/m·K | About 13.7 µm/m·K |
| Modulus of elasticity | About 180 GPa | About 180 GPa |
Monel 400/K500 Seamless Pipes Size and Weight Chart
Weight depends on OD and wall, and the wall depends on the schedule. The two alloys have different densities, so we use two constants:
OD and wall are in mm. Example: NPS 4 Sch 40S in Alloy 400 is (114.3 − 6.02) × 6.02 × 0.02765 = 18.02 kg/m. Walls for each schedule are listed in the next section.
Alloy 400 Weights
| NPS | OD (mm) | 400 Sch 10S (kg/m) | 400 Sch 40S (kg/m) | 400 Sch 80S (kg/m) |
|---|---|---|---|---|
| 1/2" | 21.3 | 1.12 | 1.42 | 1.81 |
| 3/4" | 26.7 | 1.43 | 1.89 | 2.46 |
| 1" | 33.4 | 2.35 | 2.81 | 3.63 |
| 1-1/2" | 48.3 | 3.49 | 4.54 | 6.07 |
| 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 |
Alloy K500 Weights
| NPS | OD (mm) | K500 Sch 10S (kg/m) | K500 Sch 40S (kg/m) | K500 Sch 80S (kg/m) |
|---|---|---|---|---|
| 1/2" | 21.3 | 1.07 | 1.36 | 1.74 |
| 3/4" | 26.7 | 1.38 | 1.81 | 2.36 |
| 1" | 33.4 | 2.25 | 2.69 | 3.48 |
| 1-1/2" | 48.3 | 3.34 | 4.35 | 5.82 |
| 2" | 60.3 | 4.23 | 5.85 | 8.05 |
| 3" | 88.9 | 6.94 | 12.14 | 16.43 |
| 4" | 114.3 | 9.00 | 17.29 | 24.00 |
| 6" | 168.3 | 14.87 | 30.39 | 45.77 |
| 8" | 219.1 | 21.47 | 45.76 | 69.52 |
| 10" | 273.1 | 29.88 | 64.86 | 87.70 |
| 12" | 323.9 | 38.70 | 79.45 | 104.81 |
Available Sizes, Dimensions and Schedules
Monel 400/K500 Seamless Pipes follow the schedules of ASME B36.19M. The charts above cover NPS 1/2 to 12, and other sizes and walls can be quoted on request. The table gives the wall for each schedule.
| NPS | OD (mm) | Sch 10S wall (mm) | Sch 40S wall (mm) | Sch 80S wall (mm) |
|---|---|---|---|---|
| 1/2" | 21.3 | 2.11 | 2.77 | 3.73 |
| 3/4" | 26.7 | 2.11 | 2.87 | 3.91 |
| 1" | 33.4 | 2.77 | 3.38 | 4.55 |
| 1-1/2" | 48.3 | 2.77 | 3.68 | 5.08 |
| 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 |
Tolerances follow ASTM B829. Tell us the OD and wall limits your design needs, and we will quote against them.
Monel 400/K500 Seamless Pipes Common Materials
Monel 400/K500 Seamless Pipes Suppliers offer nickel-copper alloy materials in different grades to meet industrial requirements for corrosion resistance, strength, and durability.
Alloy 400 (UNS N04400, EN 2.4360): A nickel-copper alloy known for its resistance to seawater, hydrofluoric acid, brine, and caustic solutions. It is widely used in marine engineering, chemical processing, and offshore applications.
Alloy K500 (UNS N05500, EN 2.4375): An age-hardenable nickel-copper alloy that combines corrosion resistance with higher strength and hardness. It is suitable for demanding marine, oil and gas, and industrial applications requiring enhanced mechanical properties.
The appropriate material depends on operating conditions, required strength, corrosion exposure, and applicable specifications. Reliable Monel 400/K500 Seamless Pipes Suppliers can provide material grades and dimensions according to project requirements and availability.
Monel 400/K500 Seamless Pipes We Manufacture and Supply
We make Monel 400/K500 Seamless Pipes for the services below. The alloy follows the fluid and the strength needed.
| Service | Alloy | Typical condition |
|---|---|---|
| Hydrofluoric acid piping | Alloy 400 | Annealed, stress relieved |
| Seawater piping, severe duty | Alloy 400 | Annealed |
| Brine and caustic lines | Alloy 400 | Annealed |
| Sour-service piping | Alloy 400, K500 | As the NACE limits require |
| High-strength pipe parts | Alloy K500 | Age hardened |
Applications of Monel 400/K500 Seamless Pipes
- Chemical and petrochemical plants: Hydrofluoric acid alkylation units, caustic and brine lines.
- Oil and gas: Offshore seawater, produced-water and sour-service piping.
- Marine and offshore: Severe-duty seawater lines, deck piping and fire systems.
- Desalination plants: Seawater, brine and heater piping.
- Power generation: Feedwater heater piping and seawater cooling.
- Pharmaceutical plants: Corrosive utility lines outside the product-contact zone.
- Fertiliser plants: Caustic and acid handling lines.
- Engineering and OEM: Pump and valve parts, where K500 adds strength.
Why Choose Us as Your Monel 400/K500 Seamless Pipes Manufacturer in India?
Established in 2005, we bring over 20 years of experience in manufacturing, supplying, and exporting industrial pipes and tubes. Our Monel 400/K500 Seamless Pipes range includes Monel 400 (UNS N04400, EN 2.4360) and Monel K500 (UNS N05500, EN 2.4375) for marine, chemical processing, offshore, and oil and gas applications. We offer various outside diameters, wall thicknesses, schedules, and lengths according to project specifications, with popular sizes available from ready stock, subject to availability. Our monthly supply capacity reaches up to 100 tons, and we serve customers across 85+ countries.
Quality and material traceability remain central to our operations. Our certifications include ISO 9001:2015, ISO 14001:2015, ISO 45001:2018, PED 2014/68/EU, and applicable TÜV approvals. Every order includes an EN 10204 Type 3.1 material test certificate, while Type 3.2 certification and third-party inspection are available on request. These capabilities make us a dependable Monel 400/K500 Seamless Pipes Supplier in India, supporting standard requirements, bulk orders, and project-specific piping specifications.
Countries We Export Monel 400/K500 Seamless Pipes To
Monel 400/K500 Seamless Pipes are exported to customers across 85+ countries, supporting marine engineering, offshore, chemical processing, oil and gas, and other industrial applications.
Gulf and Middle East: UAE, Saudi Arabia, Qatar, Oman, Kuwait and Bahrain.
Europe: Germany, Italy, United Kingdom, Netherlands, France, Norway and Spain.
Southeast Asia and Oceania: Singapore, Malaysia, Indonesia, Thailand, Vietnam and Australia.
Africa: South Africa, Nigeria, Egypt and Kenya.
Americas: USA, Canada, Mexico and Brazil.
Monel 400 (UNS N04400) and Monel K500 (UNS N05500) Seamless Pipes are supplied according to applicable material specifications, dimensions, and documentation requirements. Export supply supports diverse project needs, with product availability and delivery arrangements depending on the destination and order specifications.
Monel 400/K500 Seamless Pipes FAQs
Common questions about Alloy 400 and K500 selection, heat treatment, sour service, welding, and supply.
Which alloy should I choose, Alloy 400 or K500?
Choose Alloy 400 for piping in seawater, hydrofluoric acid, brine and caustic. Choose K500 when you need much higher strength, as in shafts and high-load parts, and accept the extra heat treatment.
Is Monel 400 the same as Alloy 400 or UNS N04400?
They name the same nickel-copper alloy. Monel is a trademark, and the UNS number defines the chemistry. We supply pipe to UNS N04400 and the standards named on your order.
What does age hardening do to K500?
Aging heats the alloy to about 590°C for several hours. Fine particles form in the metal and raise strength sharply. Machining and forming are easier before aging.
Can Alloy 400 be used with oxidising acids?
It is a poor choice for strongly oxidising acids such as nitric acid, and for fluids carrying oxidising salts. Check the fluid before you specify.
Can these pipes be used in sour service?
Alloy 400 and K500 can be used within the limits of NACE MR0175 / ISO 15156, which set hardness, temperature and H2S limits. State the sour-service requirement when you enquire.
How do I weld Alloy 400 pipe?
Use a matching nickel-copper filler metal, a clean joint and a qualified procedure. Keep the joint free of sulphur, lead and other contaminants, which can cause cracking.
What tolerances apply to OD and wall?
ASTM B829 sets them. Tell us your limits at enquiry, and we will quote against them.
What sizes can I order?
The charts above cover NPS 1/2 to 12 in Sch 10S, 40S and 80S. Other sizes and walls can be quoted on request.
How do I calculate the weight of an order?
Use (OD − Wall) × Wall × 0.02765 for Alloy 400 or × 0.02652 for K500, with OD and wall in mm. Multiply by length and quantity. Real weight varies slightly with wall tolerance.
Are you a manufacturer or a supplier of Monel 400/K500 Seamless Pipes?
We are both. We manufacture near Mumbai and supply ready stock of popular sizes from the same location, subject to availability.