Duplex stainless steels are widely used in various product forms, including bars, plates, pipes, forgings, and customized components designed for high-performance industrial environments.
Duplex stainless steel bars are commonly used for machining mechanical components such as shafts, fasteners, pump parts, and valve components.
Plates and sheets are widely used in pressure vessels, storage tanks, structural equipment, and industrial processing systems.
Duplex stainless steel pipes are frequently used in offshore pipelines, chemical processing equipment, and seawater handling systems due to their corrosion resistance.
Forged duplex stainless steel components offer enhanced mechanical strength and reliability. Typical forged products include rings, flanges, discs, and heavy-duty industrial parts.
We also supply customized duplex stainless steel parts manufactured according to customer drawings or technical specifications.
Duplex stainless steel is a family of stainless steels that combines the microstructures of both austenitic and ferritic stainless steels. This dual-phase structure provides a unique combination of high strength, excellent corrosion resistance, and improved resistance to stress corrosion cracking.
Duplex stainless steels provide nearly twice the yield strength of common austenitic stainless steels, allowing for lighter and more efficient structural designs.
These alloys provide strong resistance to pitting corrosion and crevice corrosion, particularly in chloride-rich environments.
Duplex stainless steels are highly resistant to stress corrosion cracking, which can be a significant issue in many industrial environments.
Modern duplex stainless steels offer good weldability when appropriate welding procedures are followed.
Because duplex stainless steels combine high strength with good corrosion resistance, they can sometimes reduce material thickness and overall project costs.
Different duplex stainless steel grades are developed to meet specific mechanical and corrosion resistance requirements.
These grades contain no molybdenum and have a lower PREN value (approximately 24–25), offering good cost-performance balance for general corrosive environments.
Accounting for over 80% of duplex stainless steel usage, these grades offer a balanced combination of strength and corrosion resistance, making them the mainstream choice in industrial applications.
Containing 25% chromium with added molybdenum and nitrogen, these grades achieve a PREN value of 38–39, offering superior corrosion resistance compared to 2205.
With a PREN value greater than 40, these grades contain high levels of chromium (25%), molybdenum (>3.5%), and nitrogen (0.22%–0.30%), providing exceptional resistance to pitting and crevice corrosion.
Compared with conventional stainless steels such as 304 and 316, duplex stainless steels typically offer higher mechanical strength and better performance in chloride-containing environments. These properties make duplex stainless steels particularly suitable for demanding industrial applications such as offshore equipment, chemical processing systems, oil and gas infrastructure, and marine engineering.
Yes. Duplex stainless steels can be welded using appropriate welding procedures and filler materials.
Yes. Duplex stainless steels typically provide significantly higher strength than conventional austenitic stainless steels such as 316
Duplex stainless steel is a type of stainless steel that contains both austenitic and ferritic microstructures, providing a combination of strength and corrosion resistance.
