Stainless Steel 347 Tubes: High-Performance Solutions for Extreme Environments

Stainless Steel 347 tubes are high-grade austenitic stainless steel tubes stabilized with niobium (columbium), designed to resist intergranular corrosion and perform reliably in high-temperature environments. SS 347 Tubes are widely used in industries such as aerospace, chemical processing, and power generation, where mechanical strength and corrosion resistance are critical.

What is Stainless Steel 347?

Stainless Steel 347 is an alloy of chromium and nickel, with added niobium to prevent chromium carbide precipitation, which can occur during welding or long-term heat exposure. This stabilization ensures the material maintains corrosion resistance even after prolonged exposure to temperatures ranging from 427°C to 816°C.

The alloy's key chemical components include 17–19% chromium, 9–13% nickel, and a minimum niobium content equivalent to 10 times the carbon content. These properties make it particularly effective for high-temperature service and resistance to thermal fatigue.

Key Benefits of Stainless Steel 347 Tubes

Stainless Steel 347 tubes offer several technical advantages that make them suitable for demanding industrial applications.

Excellent High-Temperature Strength: These tubes maintain their mechanical properties at temperatures up to 870°C, making them ideal for use in environments where thermal cycling is frequent, such as boilers, heat exchangers, and furnace parts.

Superior Corrosion Resistance: The niobium stabilization enhances the material’s resistance to intergranular corrosion, especially after welding, where traditional stainless steels might degrade. This makes 347 a reliable option in corrosive chemical and petrochemical environments.

Outstanding Weldability and Formability: Due to its austenitic structure, Stainless Steel 347 is easily welded using standard techniques and can be cold or hot formed without compromising its structural performance.

High Oxidation Resistance

Stainless Steel 347 offers excellent oxidation resistance in both intermittent and continuous service. It withstands scaling up to 925°C in continuous exposure, a key advantage in high-temperature applications.

Common Applications of Stainless Steel 347 Tubes

Stainless Steel 347 tubes are chosen across various sectors where durability and heat resistance are essential.

In the chemical industry, they are used in high-temperature process piping and pressure vessels. In aerospace, the tubes are found in engine components and exhaust manifolds. Power plants rely on 347 tubes for boiler and superheater systems, while food processing facilities use them for hygienic and corrosion-resistant transport of liquids and gases.

Industry forecasts suggest that demand for high-temperature stainless steel tubing, including 347-grade, will continue to rise due to the expansion of the energy, infrastructure, and aerospace sectors.

Steel Nix – Your Trusted Source for Stainless Steel 347 Tubes

When quality and reliability are non-negotiable, Steel Nix delivers. As a leading supplier of Stainless Steel 347 Tubes, Steel Nix provides products that meet global standards such as ASTM A213, A269, and A312. Their tubes undergo rigorous testing for strength, dimensional accuracy, and corrosion resistance, ensuring performance under extreme conditions. With a knowledgeable technical team, responsive customer service, and an extensive inventory ready for prompt delivery, Steel Nix is the preferred partner for industries seeking long-term, dependable tubing solutions.

Conclusion

Stainless Steel 347 tubes combine mechanical strength, corrosion resistance, and thermal stability, making them a superior choice for high-performance industrial systems. Whether used in chemical plants, power facilities, or aerospace applications, their durability ensures long-term efficiency. Choosing a reputable supplier like Steel Nix guarantees access to quality materials and expert support tailored to the needs of modern industry.

Contact Steel Nix today to get best deals on your project.