Monel

Monel 400 Plate & Sheet

Corrosion-Resistant Nickel-Copper Alloy 400 Cold & Hot Rolled Plates, Sheets, Coils, Shim Sheets, and Strips

Grade Monel 400 / Alloy 400 (UNS N04400, DIN EN 2.4360, W.Nr 2.4361, NiCu30Fe, AMS 5540)
Standard ASTM B127, ASME SB127, AMS 5540, BS 3072, BS 3073 (NA 13), DIN 17750, ISO 6208, NACE MR0175 / ISO 15156
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Product Overview

Om Export India Pvt Ltd is an AS 9100D certified manufacturer, stockist, and global exporter of premium Monel 400 Plates, Sheets, Coils, and Strips (ASTM B127 / ASME SB127 / UNS N04400 / DIN 2.4360). Monel 400 is a single-phase solid-solution nickel-copper alloy consisting of a minimum of 63% Nickel and 28% to 34% Copper. It delivers exceptional mechanical toughness and ductility from sub-zero cryogenic temperatures up to elevated service temperatures of 1000°F (538°C).

Our Monel 400 plate and sheet products exhibit high resistance to aggressive corrosive environments, including flowing seawater, hydrofluoric acid alkylation media, non-oxidizing mineral acids, and concentrated caustic solutions. Fully compliant with ASTM B127, ASME Section II, and NACE MR0175/ISO 15156 sour service standards, our Alloy 400 stock supports severe precision fabrication operations including cold forming, shearing, deep drawing, laser/waterjet cutting, machining, and welding without embrittlement.

  • Severe Marine & Caustic Resistance: Outstanding resistance to rapidly flowing seawater, chloride stress corrosion cracking, and hot boiling alkaline media.
  • Sub-Zero to Elevated Temperature Performance: Retains high tensile strength and impact ductility without undergoing a ductile-to-brittle transition down to -200°C.
  • Versatile Surface Finishes: Supplied in 2B, 2D, No. 1 Hot Rolled, Bright Annealed (BA), and Satin/Mirror polished conditions tailored for chemical equipment liners and pressure vessel shells.

Key Features

  • Hydrofluoric & Sulfuric Acid Resistance: High resistance to non-aerated hydrofluoric, sulfuric, and hydrochloric acids.
  • Marine Patina Protection: Extremely low corrosion and biofouling rates in high-velocity seawater and brackish water.
  • Cryogenic Toughness: Retains high impact ductility and elongation down to -200°C with zero embrittlement.
  • High Fabricability: Excellent ductility allows shearing, spinning, rolling, deep drawing, and laser profiling.
  • Stress Corrosion Resistance: Virtually immune to chloride-ion stress corrosion cracking in extreme marine and chemical media.
  • Weld Integrity: Readily weldable to itself and dissimilar metals using AWS ERNiCu-7 (Monel 60) filler wire without post-weld heat treatment.

Product Specifications

Specification Parameter Standard Specification / Technical Value
Thickness Range (Sheet / Foil / Shim) 0.30 mm to 4.0 mm (28 Gauge to 7 Gauge / 0.012" to 0.156")
Thickness Range (Plate) 4.75 mm to 76.2 mm (3/16" to 3.0" / 0.187" to 3.000")
Width Range 30" to 240" (762 mm to 6096 mm) / Slit Coil Strips from 10 mm width
Length Range 1000 mm to 6000 mm (Up to 240" / Custom Cut-to-Length Blanks)
Manufacturing Standards ASTM B127, ASME SB127, AMS 5540, DIN 17750, BS 3072, ISO 6208
Surface Delivery Condition No. 1 (HRAP), 2D Dull, 2B Smooth Cold Rolled, Bright Annealed (BA), 2BA Glossy, Satin (#4), Mirror (#8)
Cutting & Processing Services Laser Cutting, High-Definition Plasma Cutting, Waterjet Profiling, Shearing, Edge Beveling
Quality Certifications EN 10204 Type 3.1 & 3.2, AS 9100D, PED 2014/68/EU, NACE MR0175 / ISO 15156

Dimensions & Sizes

Thickness (Inches / mm) Standard Widths (mm / in.) Standard Lengths (mm / in.) Nominal Area Weight (kg/m²) Nominal Area Weight (lb/ft²)
0.50 mm (0.020") 1000 mm / 1219 mm (39.37" / 48") 2000 mm / 2438 mm (78.74" / 96") 4.50 kg/m² 0.92 lb/ft²
0.70 mm (0.028") 1219 mm (48.0") 3048 mm (120.0") 6.30 kg/m² 1.29 lb/ft²
0.90 mm (0.035") 1219 mm (48.0") 3048 mm (120.0") 8.10 kg/m² 1.66 lb/ft²
1.20 mm (0.047") 1219 mm (48.0") 3048 mm (120.0") 10.80 kg/m² 2.21 lb/ft²
1.60 mm (0.063") 1200 mm / 1219 mm (48.0") 3000 mm / 3048 mm (120.0") 14.40 kg/m² 2.95 lb/ft²
2.00 mm (0.078") 1219 mm / 1500 mm (48.0" / 59.0") 3048 mm / 6000 mm (120.0" / 236.2") 18.00 kg/m² 3.69 lb/ft²
3.00 mm (0.118") 1200 mm / 1500 mm (48.0" / 59.0") 3000 mm / 6000 mm (120.0" / 236.2") 27.00 kg/m² 5.53 lb/ft²
3.18 mm (0.125" / 1/8") 1219 mm / 1524 mm (48.0" / 60.0") 3048 mm / 6096 mm (120.0" / 240.0") 28.60 kg/m² 5.86 lb/ft²
4.75 mm (0.187" / 3/16") 1500 mm / 2000 mm (59.0" / 78.74") 6000 mm (236.22") 41.80 kg/m² 8.56 lb/ft²
6.35 mm (0.250" / 1/4") 1500 mm / 2000 mm / 2500 mm 6000 mm / Custom Cut 55.88 kg/m² 11.44 lb/ft²
9.53 mm (0.375" / 3/8") 1500 mm / 2000 mm / 2500 mm 6000 mm / Custom Cut 83.86 kg/m² 17.18 lb/ft²
12.70 mm (0.500" / 1/2") 1500 mm / 2000 mm / 2500 mm 6000 mm / Custom Cut 111.76 kg/m² 22.89 lb/ft²
19.05 mm (0.750" / 3/4") 1500 mm / 2000 mm / 2500 mm 6000 mm / Custom Cut 167.64 kg/m² 34.34 lb/ft²
25.40 mm (1.000" / 1") 1500 mm / 2000 mm / 2500 mm 6000 mm / Custom Cut 223.52 kg/m² 45.78 lb/ft²
38.10 mm (1.500" / 1-1/2") 1500 mm / 2000 mm 6000 mm / Custom Cut 335.28 kg/m² 68.67 lb/ft²
50.80 mm (2.000" / 2") 1500 mm / 2000 mm 6000 mm / Custom Cut 447.04 kg/m² 91.56 lb/ft²
76.20 mm (3.000" / 3") 1500 mm / 2000 mm 4000 mm / Custom Cut 670.56 kg/m² 137.34 lb/ft²

Chemical Composition

Element ASTM B127 / UNS N04400 (%) DIN 2.4360 / NiCu30Fe (%)
Nickel (Ni + Co) 63.00 Min 63.00 Min
Copper (Cu) 28.00 – 34.00 28.00 – 34.00
Iron (Fe, Max) 2.50 2.50
Manganese (Mn, Max) 2.00 2.00
Carbon (C, Max) 0.30 0.15
Silicon (Si, Max) 0.50 0.50
Sulfur (S, Max) 0.024 0.020

Mechanical Properties

Material Condition / Temper Tensile Strength (MPa / ksi) Yield Strength 0.2% Offset (MPa / ksi) Elongation in 2 in. (%) Hardness (Rockwell / Brinell)
Annealed Sheet & Strip (ASTM B127) 485 – 600 MPa (70 – 87 ksi) 195 – 345 MPa (28 – 50 ksi) 35% – 50% 70 – 85 HRB (120 – 165 HBW)
Hot Rolled Plate (As-Rolled / Descaled) 515 – 650 MPa (75 – 94 ksi) 275 – 450 MPa (40 – 65 ksi) 30% – 45% 75 – 90 HRB (135 – 185 HBW)
Spring Temper / Cold Rolled Hard 850 – 1050 MPa (123 – 152 ksi) 690 – 930 MPa (100 – 135 ksi) 2% – 10% 20 – 30 HRC
Physical Density & Melting Point Density: 8.80 g/cm³ (0.318 lb/in³) Melting Point: 1350°C (2460°F) Modulus of Elasticity: 105–120 kN/mm²

Standards & Specifications

Governing Body / Standard Standard Scope & Product Type
ASTM B127 / ASME SB127 Standard Specification for Nickel-Copper Alloy (UNS N04400) Plate, Sheet, and Strip
Aerospace Standard AMS 5540 Nickel-Copper Alloy Plate, Sheet, and Strip (Monel 400 Aerospace Grade)
DIN 17750 / Werkstoff 2.4360 Wrought Nickel and Nickel-Copper Alloy Strip and Sheet (NiCu30Fe)
BS 3072 / BS 3073 (NA 13) Specification for Nickel and Nickel Alloys: Sheet, Plate, and Strip
ISO 6208 Nickel and Nickel Alloy Plate, Sheet, and Strip Specifications
NACE MR0175 / ISO 15156 Sulfide Stress Corrosion Cracking Resistant Metallic Materials for Oilfield Equipment

Applications

Monel 400 plates, sheets, and slit coils are used across demanding marine, oil refining, and chemical processing equipment:

  • Marine & Offshore Engineering: Splash zone cladding plates, hull plating, offshore platform riser wraps, marine structural fixtures, and seawater tank linings.
  • Chemical Processing Infrastructure: Hydrofluoric (HF) alkylation unit lining, chlorinated hydrocarbon vessels, fluorination reactor bodies, and caustic soda evaporation vessels.
  • Petroleum Refining: Crude oil distillation column internals, tray assemblies, overhead vapor heat exchanger sheets, and storage tank bottoms.
  • Piping Components & Fasteners: Blind flanges, tube sheet plates for heat exchangers, ring gaskets, precision shim packs, and fabricated vessel heads.
  • Desalination & Power Generation: Brine heater shells, deaerator trays, boiler feed water heater tubesheets, and industrial pump body baseplates.

Frequently Asked Questions

Q1: What is the difference between Hot Rolled and Cold Rolled Monel 400 plates?
Hot rolled plates (No. 1 finish) are worked at high temperatures and descaled, making them ideal for heavy structural tanks and thick pressure vessel fabrication. Cold rolled sheets (2B, 2D, BA finishes) undergo precision cold reduction to achieve closer gauge tolerances, superior surface smoothness, higher tensile properties, and better suitability for deep drawing and decorative architectural cladding.

Q2: Can Monel 400 sheet and plate be hardened by heat treatment?
No, Monel 400 is a single-phase solid-solution alloy that cannot be hardened via thermal treatment. Higher strength and spring temper are achieved solely through cold reduction, followed by stress relief at 300°C–320°C if required.

Q3: How does Monel 400 perform against hydrofluoric acid (HF)?
Monel 400 is one of the standard materials for handling non-aerated hydrofluoric acid across all concentrations up to the boiling point, making it the premier choice for HF alkylation units in petrochemical refineries.

Q4: What surface finishes are available for Alloy 400 sheet stock?
We supply Monel 400 sheets in No. 1 (hot rolled, annealed, descaled), 2D (cold rolled dull), 2B (smooth cold rolled), BA (bright annealed), No. 4 / Satin finish with protective PVC/PE coating, and No. 8 Mirror finish for architectural or sanitary duties.

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