Monel 400 Sheets & Plates

Monel 400 sheet and plate is a copper-nickel-based alloy known for its excellent corrosion resistance and high strength. It also contains controlled amounts of manganese, silicon, and carbon. Alloy 400 sheets and plates offer good ductility and perform well in a wide range of corrosive environments. These materials exhibit outstanding resistance to both alkaline and acidic conditions.

In addition, Monel 400 provides good thermal conductivity in the annealed condition. This grade offers high tensile strength and toughness, making it suitable for subzero temperatures as well as elevated temperatures up to 480 degrees C (900 degrees F). The hardness of Monel 400 sheets and plates can be enhanced through cold working processes.

Monel Alloy 400 sheets and plates are highly resistant to stress corrosion cracking and pitting corrosion, making them suitable for marine and chemical processing environments. These products are available in both hot rolled and cold rolled forms to meet diverse industrial requirements.

Jade Alloys has supplied Monel 400 Sheet and Plate to fabricators, EPC contractors and process plant operators across 50+ countries since 2003. Our mill test certificates (MTC) are issued in accordance with EN 10204 3.1 and are available for all stock items. We hold approvals from Lloyd’s Register and Bureau Veritas for marine-grade supply. Each batch of Monel 400 Plate is inspected with PMI (Positive Material Identification) using XRF testing before dispatch, ensuring composition traceability to the heat number. View our ISO 9001 and mill approvals on our Certifications page. 

Need Monel 400 Sheet or Plate?

We hold ready stock in Mumbai for fast global dispatch.

Call: +91 9987685906  |  Email: sales@jadealloys.com  |  Request a Quick Quote

Monel 400 Sheet and Plate offer outstanding corrosion resistance across a wider range of environments than most common engineering alloys. Key resistance properties include:

• Seawater and Marine: very low corrosion rate in flowing seawater; resistant to biofouling and marine organisms
• Hydrofluoric Acid: one of the few alloys resistant to HF at all concentrations up to boiling point
• Hydrochloric and Sulphuric Acids: effective resistance under reducing (de-aerated) conditions
• Alkaline Environments: excellent resistance to caustic alkalis, neutral and alkaline salt solutions
• Stress Corrosion Cracking: virtually immune to chloride-induced SCC in typical service environments
• Pitting and Crevice Corrosion: low susceptibility in flowing media; note that stagnant seawater may cause localised pitting

Note: Monel 400 is not suitable for contact with nitric acid, moist chlorine, or oxidising acid environments.

Monel 400 Sheet and Plate can be welded using conventional processes including GTAW (TIG), GMAW (MIG) and SMAW (stick). Recommended filler metal is ERNiCu-7 (Monel 60) for GTAW/GMAW or ENiCu-7 (Monel 190) for SMAW. Key fabrication guidelines:

• Preheat: generally not required
• Post-weld heat treatment: not required for standard service; stress relief may be specified for high-restraint joints
• Cleaning: thoroughly degrease and remove oxide scale from weld area before welding
• Machining: Monel 400 work-hardens during cutting; use sharp, high-speed steel or carbide tooling with adequate feed rates

Alloy 400 can also be hot-formed (1100 to 1230 degrees C) or cold-formed using equipment suited for high-strength alloys.

• Marine Industry: Monel 400 Sheet has one of the lowest corrosion rates in flowing seawater of any commercial alloy, making it standard for propeller shafts, pump casings, and sea chest components.
• Chemical and Petrochemical: Alloy 400 Plates resist hydrofluoric acid at all concentrations up to boiling point, and are widely used in HF alkylation units, acid piping, and reactor vessel linings.
• Oil and Gas: Listed under NACE MR-01-75 for sour service; Monel 400 Plates are used in downhole tools, valve bodies and wellhead components in H2S-containing environments.
• Food Processing: Non-toxic, non-contaminating surface finish makes Monel 400 Sheet suitable for evaporators, cooking equipment and brining tanks where chloride attack would degrade standard stainless steels.
• Aerospace: UNS N04400 Plates meet AMS 4544 and are used in fuel system components, aircraft hydraulic systems and resistance-welded honeycomb panels.
• Power Industry: Monel 400 Chequered and Plain Plates are used in steam generator baffles, condenser water boxes and heat exchanger tube sheets in nuclear and conventional power plants.
• Additional Industries: Construction, bridges, shipbuilding, engineering, offshore and onshore services, and general structural applications.

Jade Alloys also stocks Monel 400 Round Bars, Monel 400 Pipes and Tubes, and Monel K500 Sheets and Plates for customers requiring complete Monel supply from a single source.

 Choose Monel 400 when: HF acid contact, sour gas service, marine structures, or chloride SCC is a risk factor.

Monel 400 Sheet and Plate prices depend on thickness, quantity, and finish. Contact us for a same-day quote. Ready stock items typically dispatch within 3 to 5 business days from our Mumbai warehouse.

We conduct comprehensive testing and inspection at multiple stages of production to ensure product quality and performance. Tests include:

• Chemical analysis
• Mechanical testing
• Hardness testing
• Flattening and flaring tests
• Micro and macro examination
• Pitting resistance test
• Positive material identification (PMI)
• Intergranular corrosion (IGC) test
• Tensile strength testing
• Eddy current testing
• Buckling and crushing tests

We provide standard test certificates in accordance with EN 10204 3.1. Documentation includes:

• Raw material test certificates
• Third-party inspection reports
• Radiography test reports
• Heat treatment charts
• Material traceability records
• Quality assurance plans
• NABL-approved laboratory reports
• Fumigation certificates

We ensure safe and damage-free delivery of Monel 400 sheets and plates through high-quality packaging materials. Products are packed in wooden cases, pallets, cartons, and boxes as per customer specifications. Each product is properly marked with details such as company name, size, grade, and material specifications to ensure easy identification and traceability.

Need Monel 400 Sheet or Plate?

We hold ready stock in Mumbai for fast global dispatch.

Call: +91 9987685906  |  Email: sales@jadealloys.com  |  Request a Quick Quote