Monel 400 Sheets & Plates

Monel 400 Sheets & Plates Supplier in Mumbai, India – ASTM B127 UNS N04400

Nicorex Alloys is an ISO 9001 / ISO 14001 certified supplier and stockist in Mumbai, India. We supply Alloy 400 sheet and plate with EN 10204 3.1 mill test certificates and PMI reports.

Monel 400 sheet and plate are flat-rolled nickel-copper alloy (63% Ni, 28-34% Cu) products manufactured according to ASTM B127 / ASME SB127. This alloy (UNS N04400, Werkstoff Nr. 2.4360) resists flowing seawater, hydrofluoric acid, de-aerated sulfuric acid, and caustic alkalis across a service range of -196°C to 538°C (1000°F). Per ASTM B127, material under 6.35 mm is classified as sheet; 6.35 mm and above is plate. Sheet thickness spans 0.1 to 4.76 mm; plate from 4.76 to 100 mm. Widths run 1000 to 2500 mm, lengths up to 6000 mm for sheets and 12000 mm for plates. Standard sizes include 1000×2000, 1220×2440, 1500×3000, and 2000×4000 mm. Hot-rolled plate (annealed) reaches 485 MPa (70 ksi) minimum tensile strength with 35% elongation per ASTM B127. Cold-rolled sheet is available in soft, quarter-hard, half-hard, and spring-hard tempers. Surface finishes cover #1, #2D, #2B, BA, and mirror polish. The melting range falls between 1300-1350°C (2370–2460°F). Density is 8.80 g/cm³.

Available forms include sheet, plate, strip, coil, foil, shim, clad plate, and perforated sheet in hot-rolled and cold-rolled processes. The alloy is weldable by GTAW, GMAW, and SMAW with no post-weld heat treatment required. Target industries include marine, oil and gas, chemical processing, power generation, and aerospace.

Monel 400 Sheet & Plate Specifications

Monel 400 sheet specifications display standards, dimensions, conditions, tempers, surface finishes, and other details. Check out the table given below:

Standard:	ASTM B127 / ASME SB 127
AMS:	4544 (Sheet, Strip, Plate)
Thickness:	Sheet – 0.1 mm to 4.76 mm Plate – 4.76 mm to 100 mm
Width:	1000 mm to 2500 mm
Length:	Sheet – Up to 6000 mm, Plate – up to 12000 mm
Sizes:	Sheet – 1000×2000, 1220×2440, 1500×3000 mm Plate – 1500×3000, 2000×4000, 2000×6000 mm
Process:	Hot Rolled (HR), Cold Rolled (CR)
Condition:	Annealed, As-Rolled (AR), Stress-Relieved, Bright Annealed
Hardness Tempers:	Soft, Quarter Hard, Half Hard, Full Hard, Spring Hard

Chemical Composition of Monel 400 Sheet & Plate

Monel 400 chemical composition per ASTM B127, UNS N04400, has been given in the table below. This alloy has around 63% nickel and cobalt combined, and 28-34% copper.

Nickel (Ni) + Cobalt (Co)	Copper (Cu)	Iron (Fe)	Manganese (Mn)	Carbon (C)	Silicon (Si)	Sulphur (S)
63.0 min	28.0 – 34.0	2.5 max	2.0 max	0.3 max	0.5 max	0.024 max

The 63% Ni / 28-34% Cu balance gives Monel 400 sheet immunity to chloride stress-corrosion cracking. Copper drives reducing-acid resistance; nickel provides the structural base for seawater and alkali service.

Mechanical Properties of ASTM B127 Monel 400 Sheet & Plate

The mechanical properties of Monel 400 sheet and plate vary based on the rolling process and temper condition. The table given below shows the strength and toughness of this alloy.

Condition (Temper)	Tensile Strength, min, psi (MPa)	Yield Strength^A (0.2% offset), min, psi (MPa)	Elongation in 2 in. or 50 mm, or 4D, min, %	Rockwell Hardness (B Scale)^B,C
Hot-Rolled Plate
Annealed	70 000 (485)	28 000 (195)	35	…
As-rolled^D,E	75 000 (515)	40 000 (275)	25	…
Hot-Rolled Sheet
Annealed	70 000 (485)	28 000 (195)	35	…
Cold-Rolled Sheet
Annealed	70 000 to 85 000 (485 to 585)	28 000 (195)	35	…
Quarter-hard	…	…	…	73 to 83
Half-hard	…	…	…	82 to 90
Hard	100 000 (690)	90 000 (620)	2	…
Cold-Rolled Strip
Annealed	70 000 to 85 000 (485 to 585)^F	28 000 (195)	35^F	…
Skin hard	…	…	…	68 to 73
Quarter-hard	…	…	…	73 to 83
Half-hard	…	…	…	82 to 90
Three-quarter-hard	…	…	…	89 to 94
Hard	100 000 (690)^F	90 000 (620)	2^F	…
Spring temper	…	…	…	98 min

Cold-rolled tempers: Quarter Hard 586-758 MPa, Half Hard 655–862 MPa, Full Hard 827 MPa min. The 35% elongation in annealed condition allows deep drawing for chemical equipment linings.

Physical Properties of Monel 400 Sheets & Plates

Physical properties, including Monel 400 density, Monel 400 melting point, thermal conductivity, and electrical resistivity, have been provided in the table given below:

Density	Melting Range	Curie Temperature	Thermal Conductivity (25°C)	Elastic Modulus	Thermal Expansion (25–100°C)	Electrical Resistivity (25°C)
8.80	1300-1350	21-49	21.8	179	13.9 × 10⁻⁶	0.547
g/cm	°C	°C	W/m·°C	GPa	/°C	µΩ·m

Monel 400 is slightly magnetic at room temperature because the Curie temperature (21–49°C) falls within the ambient range.

Monel 400 Sheet & Plate Equivalent Grades

Monel 400 sheet and plate are globally recognised by their standard equivalent designation as N04400. The other equivalent designations have been given below:

Standard	UNS	Werkstoff Nr.	BS	DIN	GOST	JIS
Designation	N04400	2.4360 / 2.4361	3072 NA1, 3073 NA13	17750	МНЖМц 28-2.5-1.5	NW 4400

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Available Forms of Monel 400 Sheet & Plate

Monel 400 flat products for fabrication and cladding:

Monel 400 Hot Rolled Plate

Monel 400 Cold Rolled Sheet

Monel 400 Strip

Monel 400 Coil

Monel 400 Foil

Monel 400 Shim Sheet

Monel 400 Clad Plate

Monel 400 Perforated Sheet

Corrosion Resistance of Monel 400 Sheet & Plate

Monel 400 corrosion resistance covers seawater, reducing acids, and caustic alkalis in sheet and plate applications:

Medium	Corrosion Rate (mpy)
Seawater (flowing)	< 1
Hydrofluoric Acid (48%)	< 5
Sulphuric Acid (de-aerated, 10%)	< 5
Caustic Soda (50%, 80°C)	< 2

Not recommended for nitric acid, ammonia systems, or oxidising acids. For oxidising conditions, consider Inconel 625 plate.

Hot Working, Cold Forming & Heat Treatment of Monel 400

Hot work Monel 400 plate at 649-1177°C (1200–2150°F). Begin heavy reductions at the upper end. Do not work below 649°C. The alloy work-hardens between mild steel and SS 304 rates, and adapts to deep drawing, spinning, and bending in annealed condition

Anneal at 871°C (1600°F) minimum for full stress relief. Weld by GTAW, GMAW, or SMAW using ERNiCu-7 (AWS A5.14, Monel FM 60) for GTAW/GMAW and ENiCu-7 (AWS A5.11, Monel 190 electrode) for SMAW. No PWHT is required. Clean surfaces thoroughly before welding to remove sulphur and phosphorus contamination.

Industries Using Monel 400 Sheet & Plate

Monel 400 sheet and plate are specified across 6 major industries where flat-rolled, corrosion-resistant material is needed for fabrication, cladding, or structural applications: marine and shipbuilding, oil and gas processing, chemical processing, power generation, aerospace and defence, and pulp and paper.

Marine & Shipbuilding: Hull cladding, propeller shaft liners, and seawater pump wear plates.
Oil & Gas: HF alkylation reactor lining, crude column trays, and sour gas gaskets (NACE MR-01-75).
Chemical Processing: Reactor vessel cladding and caustic evaporator bodies under ASME Section VIII.
Power Generation: Boiler feedwater heater tubesheets and condenser baffles.
Aerospace: Fuel tank panels and hydraulic system components.
Pulp & Paper: Bleach plant liners and chemical recovery boiler components.

Monel 400 Sheet vs Plate – When to Use Which?

When it comes to selecting Monel 400 plate and sheet, people usually get confused. The selection depends on your application requirements. Here is a side-by-side comparison:

Parameter	Sheet	Plate
Thickness	0.1 – 4.76 mm	≥4.76 mm
Process	Cold Rolled	Hot Rolled or CR
Surface	Smoother (2B, BA)	Rougher (#1, 2D)
Formability	Higher (bend, draw)	Lower
Use	Gaskets, linings, light fab	Vessels, tanks, structural

If you need material under 6 mm for gaskets, cladding, or precision components, go with sheet. For structural work, pressure vessel shells, or tank construction above 6 mm, plate is the right call. Materials in the 4.8–6.4 mm overlap zone can be ordered as either form depending on the surface finish and tolerance you need.

How to Order Monel 400 Sheet & Plates from Nicorex Alloys

Provide these following details to order Monel 400 Sheet & Plate from us:

Product Form – Sheet, Plate, Strip, Coil, or Foil
Thickness –Specify in mm or gauge number
Width × Length – Standard size or custom cut dimensions
Quantity – In kg, MT, or number of pieces
Condition – Annealed, As-Rolled, Half Hard, Full Hard, or other temper
Surface Finish – #1, #2B, BA, Mirror, or other requirement
Edge Type – Mill, Slit, Sheared, or Rolled
Standard – ASTM B127, ASME SB127, AMS 4544, or project-specific
Additional Testing – TPI, NACE, PMI, UT, or other NDT
Packaging – Standard, export-grade, wooden case
Delivery Destination – Domestic or export

Send your inquiry with these details to get an accurate quotation within 24 hours. Custom sizes available on request.

Frequently Asked Questions

What ASTM Standard Covers Monel 400 Sheet and Plate?

ASTM B127 / ASME SB127 covers UNS N04400 plate, sheet, and strip. AMS 4544 for aerospace.

What is the Thickness Difference Between Monel 400 Sheet and Plate?

Per ASTM B127, material under 4.76 mm (3/16 inch) is sheet; 4.76 mm and above is plate.

Can Monel 400 Plates Be Used for Pressure Vessel Fabrication?

Yes. ASME SB127 plates are approved under BPVC Sections III, IV, and VIII in the annealed condition.

What is the Maximum Operating Temperature for Monel 400 Sheet & Plate?

538°C (1000°F) continuous service. At cryogenic temperatures down to –196°C, the alloy retains ductility with no ductile-to-brittle transition.

Is Monel 400 Sheet Available in Custom Sizes?

Yes. Plasma, waterjet, and shearing available. Contact Nicorex Alloys with dimensions.

What Surface Finishes are Available for Monel 400 Sheet?

#1 (HR, descaled), #2D (CR, dull), #2B (CR, smooth), and BA (bright annealed). Mirror polish on request.

How Does Monel 400 Plate Compare to Inconel 625 Plate?

Monel 400 (Ni-Cu) suits marine and reducing-acid environments. Inconel 625 (Ni-Cr-Mo) handles oxidising conditions to 982°C. Monel 400 is more cost-effective for seawater and acid service.

What is the Price of Monel 400 Sheet and Plate in India?

Monel 400 sheet and plate in India is typically priced between ₹1,800 to ₹3,200 per kg depending on thickness, finish, and quantity. Contact Nicorex Alloys for current pricing.