What Is Super Duplex Stainless Steel Material?
'Super duplex' refers to a group of high-performance stainless steels with approximately 25% chromium content. True to its name, this alloy features a microstructure composed of both austenitic and ferritic steel grains. This unique duplex structure gives Super Duplex stainless steels their distinctive physical and mechanical properties.Super duplex stainless steel is a high-performance alloy distinguished by its exceptional strength and corrosion resistance. It features a unique microstructure that combines both austenitic and ferritic stainless steel phases, providing an outstanding balance of mechanical and chemical properties. Typically containing around 25% chromium, super duplex steel excels in resisting corrosion, especially in chloride-rich environments. The addition of molybdenum and nitrogen further enhances its resistance to pitting and stress corrosion cracking. With its high tensile strength and toughness, super duplex stainless steel is ideally suited for demanding applications, including those in the oil and gas industry, chemical processing, and marine environments. Its robust properties make it a preferred choice for high-pressure and high-temperature conditions.
Uses of Super Duplex Stainless Steel
Super duplex stainless steel, including grades like Super Duplex 2507 and UNS S32750, is highly valued for its exceptional resistance to acids, acid chlorides, and caustic solutions, making it ideal for aggressive environments in the chemical, petrochemical, pulp, and paper industries. Its superior resistance to stress corrosion cracking and enhanced mechanical properties set it apart from more common austenitic stainless steels, such as the 3xx series, and standard duplex steels like S32205.
Super Duplex material is commonly used in demanding applications, including pumps, valves, fasteners, pipework, and connectors, particularly in the oil and gas, petrochemical, chemical, pulp, and paper industries. Langley Alloys offers an extensive range of super duplex materials, including solid bars up to 16 inches (406.4mm) in diameter, plates up to 3 inches thick, and access to pi
