Stainless Steel 321/321H Pipes & Tubes

At Neonox Overseas, we supply Stainless Steel 321/321H Pipes & Tubes in a wide range of forms including Seamless, Welded, ERW, and Fabricated, ensuring flexibility in usage across different industrial applications. Our seamless pipes are manufactured using state-of-the-art technology to provide excellent dimensional accuracy and superior surface finish, making them suitable for high-pressure applications. Welded and ERW tubes offer cost-effective solutions while maintaining excellent mechanical properties and corrosion resistance. Fabricated options are customized according to client requirements, ensuring maximum efficiency in specific projects. The available sizes range from small-diameter precision tubing to large industrial pipelines, with wall thicknesses tailored to both light-duty and heavy-duty applications.

The chemical composition of Stainless Steel 321/321H is based on chromium and nickel content, with titanium additions that improve stabilization against sensitization. Grade 321 typically has a maximum carbon content of 0.08%, while 321H has a higher carbon content (0.04–0.10%) to improve high-temperature strength. Both grades maintain excellent weldability and formability, making them easy to fabricate without compromising durability. Mechanical properties include a minimum tensile strength of 515 MPa, yield strength of 205 MPa, and elongation of 40%, with outstanding toughness retained even at cryogenic temperatures.

In terms of resistance, Stainless Steel 321/321H Pipes & Tubes provide excellent performance in oxidizing and moderately corrosive environments. They are widely used in chemical processing, refineries, and thermal oxidizers due to their ability to withstand prolonged exposure to high temperatures without scaling or loss of mechanical properties. Additionally, they offer reliable resistance against polythionic acid stress corrosion cracking, which is a critical factor in refinery and petrochemical operations.

With a strong focus on international quality standards, Neonox Overseas ensures that each pipe and tube undergoes stringent testing such as hydrostatic testing, ultrasonic inspection, and PMI testing. Our products are available in accordance with global specifications like ASTM A312, A213, A269, A249, and ASME SA312, ensuring compatibility with diverse industry requirements. Supplied in annealed, pickled, and polished conditions, our Stainless Steel 321/321H Pipes & Tubes are trusted by clients across oil & gas, pharmaceuticals, shipbuilding, heat exchangers, condensers, and engineering projects.

By combining premium raw materials, advanced manufacturing techniques, and strict quality controls, Neonox Overseas delivers Stainless Steel 321/321H Pipes & Tubes that exceed customer expectations in terms of durability, performance, and long-term reliability.