Monel 400 Plates and Sheets Manufacturer and Supplier in India
Monel 400 Plates and Sheets are nickel copper alloy products designed to have high strength, durability, and resistance to corrosion under the conditions of severe industrial applications. These plates and sheets are manufactured with ASTM B127 and ASME SB127 conformance and consist of about 63 percent nickel and 2834 percent copper with additions of iron, manganese, silicon and carbon being controlled in order to improve mechanical stability as well as mechanical performance. The grade UNS N04400 / WNR 2.4360 has a high resistance to seawater, steam, acid and alkaline conditions and rapidly moving brackish water, and thus is very popular in the offshore and chemical processing industry.
Monel Alloy 400 Plates and Sheets are in hot rolled and cold roll finish, which are useful in critical operations cutting, forming, machining, welding, polishing and fabrication. These materials provide high tensile strength, excellent hardness by cold working and excellent toughness even at the cryogenic temperatures and high service temperatures up to 1000F (538C).
In Stellar Alloys, Monel 400 Plates and Monel 400 Sheets are supplied to pressure vessels, heat exchangers, marine components, pump and valve bodies, condenser systems, petrochemical equipment, and power generation units in a wide variety of thicknesses, widths and lengths to satisfy the project requirements of each. We maintain a rigorous quality, mill test certification and ready inventory of stocks to enable rapid delivery schedule to international EPC contractors and industrial purchasers.
High-Quality Monel 400 Plates and Sheets in ASTM B127 UNS N04400 for Corrosion-Resistant Industrial Applications
Monel 400 Plates and Sheets are manufactured of solid-solution nickel-copper alloy which is known to provide high resistance to corrosion, high mechanical strength and long duration of life of a product under rigorous conditions of use. These plates and sheets, which are manufactured to ASTM B127 and ASME SB127 material specifications, and are specified as UNS N04400 / WNR 2.4360, provide dependable service in severe marine, offshore, chemical handling and heat-transfer apparatuses where standard stainless steel alloys cannot achieve integrity.
Monel Alloy 400 has a chemical composition of a mix of about 63 percent nickel and 28 34 percent copper with the addition of iron, silicon, manganese and carbon being under control. This balance offers a very high level of resistance to seawater, damp condition, high temperature and high temperature steam, neutral and alkaline salt solution, and also to fast moving brackish water. It also has a high resistance to de-aerated hydrochloric and hydrofluoric acid and is immune to stress corrosion cracking, and pitting induced by chlorides.
Reinforced, Monel 400 plates and sheets with either hot rolled (HR) or cold rolled (CR) finishes have a high level of dimensional stability with high workability in the forming, machining, cutting, bending, grinding and polishing processes. They are tough enough to operate to sub-zero cryogenic temperatures down to 538oC (1000 o F) at high service temperatures, so they are used in heat exchangers, pump and valve bodies, condenser systems, seawater scrubbers, desalination equipment, chemical reactors, power generation units and fabricated process equipment.
Monel K500 Plates and Sheets can be used in place of Monel K800 to offer higher performance, with increased mechanical properties due to the ability to age-harden. Having a stable quality, high inspection criteria and inventory with various thicknesses and sizes will allow Stellar Alloys to guarantee quick delivery to EPC contractors and other world-wide engineering projects in need of reliable nickel alloy solutions.
What Are Monel 400 Plates and Sheets and Understanding Their Manufacturing to ASTM B127 UNS N04400 Standards
Monel 400 Plates and Sheets are outstanding nickel-copper alloys flat-rolls that are characterized by excellent corrosion resistant features, high strength and prolonged performance in the aggressive environment. This alloy is categorized as UNS N04400 / WNR 2.4360, which is a fine mixture of nickel and copper with traces of iron, silicon and manganese to promote longevity and strength. This is highly trusted in industries whereby normal stainless steels are not able to withstand adverse operating environments.
These plates and sheets are produced in line with ASTM B127 and ASME SB127 requirements, which have strict control over chemical properties, dimensional and surface finish and mechanical performance. The compound enhances numerous fabrication operations such as forming, welding, machining, cutting, bending and polishing, and is still very tough at cryogenic temperature up to high service temperature.
Monel 400 has a remarkable ability to resist the rapid flowing seawater, steam, moisture, alkaline and neutral salt solutions, and excels in resisting the acid attack in de-aerated environments, hence it is ideally suited to heat exchangers, marine hardware, pump and valve parts, desalination systems, chemical processing equipment, offshore structures and condenser units.
The Monel 400 Plates and Sheets are designed with a demanding application in the marine, chemical, petrochemical, oil and gas, and power generation industries and still continue to be a preferred material in corrosion-intensive and safety-critical operating conditions.
Technical Specifications of Monel 400 Plates and Sheets Manufactured as per ASTM B127 UNS N04400 Standards
The Monel 400 Plates and Sheets are known to have the technical specifications that provide the required dimensional accuracy, high-performance mechanical characteristics, and stable quality of the material to meet the hard industrial utilization. These plates and sheets are manufactured to the internationally accepted standards like ASTM B127, ASME SB127, and UNS N04400. These plates and sheets are provided in a large variety of thicknesses, widths, surface finishes, and hardness states to satisfy custom fabrication and engineering project needs. The following table displays specifications of the sizes, surface finishes, processing options, certifications and testing provided by Stellar Alloys.
| Parameter | Details |
| Product Type | Monel 400 Plate, Monel 400 Sheet, Hot Rolled Plate (HR), Cold Rolled Sheet (CR), Flat Plate, Plain Sheet |
| Grade | Monel 400 / Alloy 400 (UNS N04400 / WNR 2.4360) |
| Specifications | ASTM B127, ASME SB127, AMS 4544, BS3072 NA13 (Sheet & Plate), EN standards |
| Thickness Range | 0.3 mm to 120 mm |
| Width | 1000 mm to 2500 mm |
| Length | 2000 mm to 6000 mm or customized |
| Process | Hot Rolled (HR), Cold Rolled (CR) |
| Surface Finish Options | No.1, 2B, BA, No.4, Hairline, Brushed, Satin, Mirror Polished |
| Hardness | Soft, Half Hard, Quarter Hard, Spring Hard |
| Standard Sheet / Plate Sizes | 1000 x 2000 mm, 1220 x 2440 mm, 1500 x 3000 mm, 2000 x 4000 mm |
| Testing & Inspection | UT, Eddy Current, PMI Test, IGC Test, Third-Party Inspection |
| Documentation | EN 10204 3.1 / 3.2 MTC |
| Origin Availability | India, Europe, Japan |
| Packaging | Export-grade waterproof packaging / wooden box |
Types of Monel 400 Plates and Sheets Available in Hot Rolled and Cold Rolled Finishes

Monel 400 Hot Rolled Sheet

Monel Alloy 400 Cold Rolled Sheet

Monel Alloy 400 Hot Rolled Plate

Alloy 400 Cold Rolled Plate

Monel 400 Coil

Monel 400 Shim
Equivalent Grades of Monel 400 Plates and Sheets (UNS N04400 and WNR 2.4360)
| STANDARD | UNS | WERKSTOFF NR. | AFNOR | EN | JIS | BS | GOST |
| Monel 400 | N04400 | 2.4360 | NU-30M | NiCu30Fe | NW 4400 | NA 13 | МНЖМц 28-2,5-1,5 |
Manufacturing Process of Monel 400 Plates and Sheets

Reheating Furnace

Scale Breaker

Finish Rolling

Cooling

Scale Breaker

Marking & Packing
Chemical Composition of Monel 400 Plates and Sheets (UNS N04400 and WNR 2.4360)
| Grade | Ni | C | Al | Mn | Si | Fe | Cu | S | Co | Cr |
| 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 | – | – |
Mechanical Properties of Monel 400 Plates and Sheets for Engineering Applications
| 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 % |
Density and Melting Range of Monel 400 Plate Material
| UNS N04400 Monel 400 Plate density |
|
Monel 400 Plate and Sheet Surface Finishes with Available Thickness and Width Range
| Sheet, Plate Surface Finish | Thickness (mm) | Width (max mm) |
| 2B – Cold rolled, heat treated, pickled, skin passed Sheet | 0.25–8.0 | 2032 |
| 2D – Cold rolled, heat treated, pickled Sheet | 0.4–6.35 | 1524 |
| 2E – Cold rolled, heat treated, mechanically descaled plate | 0.4–8.0 | 2032 |
| 2R – Cold rolled, bright annealed plate | 0.25–3.5 | 1524 |
| 2H – Work hardened plate | 0.4–6.35 | 1524 |
| Polished, brushed plate | 0.5–4.0 | 1524 |
Standard Size Chart and Dimensional Range for Alloy 400 Plates
| Size | Diameter |
| .125″ | 3.18mm |
| .134″ | 3.40mm |
| .156″ | 3.96mm |
| .187″ | 4.75mm |
| .250″ | 6.35mm |
| .312″ | 7.92mm |
| .375″ | 9.53mm |
| .500″ | 12.7mm |
| .625″ | 15.9mm |
| .750″ | 19.1mm |
| .875″ | 22.2mm |
| 1″ | 25.4mm |
| 1.125″ | 28.6mm |
| 1.250″ | 31.8mm |
| 1.500″ | 38.1mm |
| 1.750″ | 44.5mm |
| 2″ | 50.8mm |
| 2.500″ | 63.5mm |
| 3″ | 76.2mm |
Applications of Monel 400 Plates and Sheets
Monel 400 Plates and Sheets are used in challenging industrial conditions where the ability to withstand seawater corrosion, alkaline environments and high temperature are needed. They are better suited in strength, thermal stability, and versatility of fabrication and are thus used in critical components in marine, chemical processing, power generation, and offshore engineering industries.

Applications
- Condensers, evaporator units and heat exchangers.
- Marine hardware fabrication and seawater desalination plants.
- Pump shafts, valve construction, and pressure vessel construction.
- Offshore field, oil and gas production and storage.
- Alkali production, pickling apparatus and chemical reactors.
- Cryogenic service assemblies and aerospace fasteners.
- It’s used in the boiler feed water system and utility piping at power plants.
- Many Pharmaceutical and food-processing components are made with the use of this material.
Why Stellar Alloys for Monel 400 Plates and Sheets
Stellar Alloys is known to provide very reliable Nickel Alloy solutions supported with accurate engineering, low priced and guaranteed availability. Our Monel 400 plates and sheets are available in both hot and cold rolled finish, and in large quantities of ready stock to respond to demand quickly when required on an urgent project. The quality of our products is also strictly checked and has gone through some quality validation, dimensional accuracy tests, ultrasonic and destructive tests and is accompanied with a full material traceability documentation including EN 10204 3.1 and NABL-approved reports.
Our cutting, shearing, waterjet and profiling capabilities are highly advanced to accommodate custom sizes and project specific fabrication without deteriorating mechanical properties. The supply chain network spread all over India and export coverage throughout the globe gives Stellar Alloys a smooth logistics and dependable project delivery.
Key Benefits
- Rapidity and extensive inventory selection.
- Accurate customization and value added processing.
- Certified material whose certificates are tested and traced.
- Special technical assistance on EPC and industrial purchase.
Related Links
Frequently Asked Questions About Monel 400 Plates And Sheets
Monel 400 is a nickel-copper alloy (solid solution) which is composed of about 63% nickel and 28-34% copper with controlled amounts of iron, silicon, manganese as well as carbon. It has a great corrosion resistance in sea water, alkaline, steam, neutral salts and fast moving seawater. Monel 400 is heat stable, highly durable with high mechanical strength and extensive applications in marine engineering, chemical processing, desalination and heat-transfer equipment.
ASTM B127 / ASME SB127 is the standard of Monel 400 Plates and Sheets. This standard refers to Nickel-Copper Alloy 400 in the shapes of hot-rolled and cold-rolled plates, sheets and strip of sizes that are provided in an annealed or stress-relieved state. ASTM B127 guarantees accuracy in chemical composition, mechanical strength, dimensions tolerance and anti-corrosive performance which can be used in industrial applications.
A Monel 400 Plate is a high-strength pressure-retaining components and fabrication work consisting of corrosion-resistant nickel alloy exploited so as a flat-rolled product. Plates can be hot-rolled or cold-rolled finished and can be cut, formed, welded and machined. They are used in the evaporators, condensers, heat exchangers, process equipment and marine components that corrode easily.
Monel 400 has the same name across the globe, which are UNS N04400, WNR 2.4360, AFNOR NU-30M, EN NiCu30Fe, JIS NW4400 and BS NA13. These equivalents are the identical chemical and mechanical property utilized in international production such that global engineering work has the ability to be compatible.
Monel 400 is an excellent saltwater resistant corrosion, high ductile, high weldable, chloride stress cracking immunity, high and cryogenic temperature performer. It has tensile strength of about 80,000 PSI (550 MPa) and can be used with continuous service to 1000°F (538C).
Monel 400 Sheets and Plates finds many applications in oil and gas, shipbuilding, desalination plants, power generation, petrochemical processing, chemical reactors, pump and valve manufacturing, boiler feedwater systems, pharmaceutical processing and pollution control equipment.
Monel 400 offers superior resistance against seawater, as well as high-velocity brackish water thus being effective in marine pumps, condenser tube, propeller shafts, heat exchanger units, scrubbers, and offshore structures. It is pitting, crevice corrosion and cavitation resistant which makes it a popular alloy in long term marine installations.
