SME SB163 UNS N04400 Nickel Copper Alloy Seamless Tube Excellent Corrosion Resistance for Marine & Chemical Applications

ASME SB163 N04400 Nickel Copper Alloy Seamless Tube Excellent Corrosion Resistance for Marine & Chemical Applications

YUHONG Group: Your Trusted Partner in High-Performance Alloy Tubes​
With over 35 years of industrial expertise and a global presence across 85 countries, YUHONG Group specialises in manufacturing precision-engineered alloy tubes for critical applications. Our ASME SB163 N04400 Nickel-Copper Alloy Seamless Tubes are designed to excel in harsh marine and chemical environments, combining exceptional corrosion resistance with robust mechanical performance. Backed by international certifications and stringent quality control, we deliver reliable solutions for heat exchangers, offshore platforms, and chemical processing systems worldwide.

Chemical Composition of UNS N04400

Specifications for Nickel-Copper Alloy UNS N04400

Mechanical Properties of Nickel-Copper Alloy UNS N04400 (Monel 400) Tubing

ASME SB163 N04400 (Monel 400) Seamless Tube Key Application Advantages

1. Exceptional Corrosion Resistance in Demanding Environments​
The nickel-copper alloy composition (Ni 63-70%, Cu 28-34%) provides outstanding resistance to corrosion in seawater, salt solutions, and various acidic and alkaline media. It is particularly effective against sulfuric acid, hydrofluoric acid, and phosphoric acid, making it a preferred choice for chemical processing and marine applications where many other materials fail. Its corrosion rate in seawater is remarkably low, typically less than 0.025 mm/year, ensuring long-term durability.
2 . Excellent Mechanical Properties Across a Wide Temperature Range​
This alloy maintains high strength and good toughness from cryogenic temperatures as low as -196°C up to approximately 480°C. With a typical annealed condition tensile strength of ≥480 MPa and yield strength of ≥170 MPa, it reliably withstands high-pressure conditions in heat exchangers, condensers, and other pressure components.
3. Good Processability and Weldability​
The material offers good hot and cold workability, allowing for the manufacture of seamless tubes with precise dimensions. It can be welded using common techniques like TIG (GTAW) and MIG (GMAW) without requiring post-weld heat treatment, which simplifies fabrication and installation processes.
4. Long-Term Reliability and Cost-Effectiveness​
The combination of superior corrosion resistance, mechanical strength, and a long service life significantly reduces maintenance needs, downtime, and replacement frequency in critical systems. This results in lower overall lifecycle costs despite a potentially higher initial investment compared to standard stainless steels.
5. Proven Performance in Critical Global Standards​
Manufactured in compliance with ASME SB163 and other major international standards (such as ASTM B163), this seamless tube ensures quality, safety, and interoperability for global projects in oil & gas, power generation, and marine engineering.