Monel 400 Strip – Superior Corrosion Resistance & Durability for Marine, Petrochemical & Nuclear Applications

Description

Monel 400 strip is a nickel-copper alloy (UNS N04400) renowned for its exceptional resistance to corrosive media, high-temperature stability, and robust mechanical performance. With a composition of 63–70% nickel, 28–34% copper, and controlled iron (≤2.5%) and manganese (≤2.0%), this alloy forms a single-phase solid-solution structure that excels in environments such as seawater, sulfuric acid, hydrofluoric acid, and alkaline solutions. Its low carbon content (≤0.3%) and sulfur (≤0.024%) minimize sensitization and intergranular attack, ensuring long-term reliability in critical applications like marine heat exchangers, chemical reactors, and nuclear fuel processing systems.

Certified to ASTM B127, ASME SB-127, and ISO 15156 (NACE MR0175), Monel 400 strip achieves a tensile strength of 480–550 MPa and elongation ≥35%, making it ideal for dynamic or cryogenic conditions ranging from -196°C to 600°C. The alloy’s high thermal conductivity (21.8 W/m·K) and low thermal expansion coefficient (13.9 µm/m·°C) ensure dimensional stability in cyclic thermal operations, outperforming conventional stainless steels in chloride-rich or hydrogen sulfide (H₂S) environments.

Technical Specifications (Table)

Applications

1. Marine Engineering: Seawater heat exchangers, offshore platform piping, and ship propeller shafts.

2. Chemical Processing: Reactors, sulfuric acid storage tanks, and hydrofluoric acid handling systems.

3. Nuclear Industry: Uranium enrichment equipment and nuclear reactor coolant components.

4. Oil & Gas: Sour gas pipelines, LNG liquefaction systems, and downhole tools in H₂S environments.

5. Power Generation: Flue gas desulfurization (FGD) units and geothermal energy systems.

Q&A

Q1: Can Monel 400 strip withstand prolonged exposure to seawater?
A: Yes. Its nickel-copper matrix resists chloride-induced pitting and crevice corrosion, making it ideal for marine applications like desalination plants.

Q2: Is post-weld heat treatment required for Monel 400 strip joints?
A: Typically not. The alloy’s low carbon content minimizes sensitization, but stress relief annealing (600–650°C) is recommended for thick-section welds in high-pressure systems.

Q3: Does Monel 400 comply with NACE standards for sour gas pipelines?
A: Absolutely. It meets ISO 15156 (NACE MR0175) for H₂S-rich environments, ensuring resistance to sulfide stress cracking.

Wuxi Nickel New Material Co., Ltd. is a high-tech enterprise integrating the production, manufacturing, and research & development of specialty alloy materials. Located in Wuxi, Jiangsu Province, the company specializes in precision alloys, titanium alloys, high-temperature alloys, corrosion-resistant alloys, heat-resistant steels, nickel-based welding wires, and other specialty materials, with an annual production capacity of 5,000 tonnes. Our product range includes plates, bars, wires, and strips, which are widely used in industrial electric furnaces, power‐station boilers, petrochemical plants, aerospace, marine engineering, machinery, and electronic instrumentation. These materials are characterized by high electrical resistance, high‐temperature strength, corrosion resistance, wear resistance, and fatigue resistance. We can manufacture in compliance with national, industry, and international standards, and are also able to tailor products to meet specific customer requirements.
The company is committed to improving and enhancing its production infrastructure all year round, with a full range of production and processing equipment including vacuum smelting, hot processing, cold processing, and heat treatment. It also has various physical and chemical analysis testing facilities such as spectrometers to ensure product quality. The company has a high-quality R&D, production, and management team that is fully capable of meeting the complex requirements of the current market for material diversification, refinement, and functionalization. Our company is particularly skilled in developing and producing "specialized materials" that are suitable for the market and specific customer needs, which will be one of our company's characteristics. The company adheres to the business philosophy of "guided by market demand, driven by technological progress, and committed to optimizing and innovating materials to create greater value for customers", serving society and the market.