Duplex / Super Duplex Steel Fasteners

Bhansali Enterprises is a notable manufacturer and supplier of Duplex and Super Duplex fasteners in Mumbai, India. Duplex and Super Duplex Fasteners are types of corrosion-resistant fasteners that find extensive use in various industries due to their superior mechanical properties and resistance to corrosion in challenging environments. Duplex stainless steels are characterized by a two-phase microstructure consisting of both austenitic (chromium-nickel) and ferritic (chromium-molybdenum) phases. This dual-phase structure imparts a unique combination of high strength and excellent corrosion resistance.

Common types of Duplex and Super Duplex fasteners include studs, bolts, nuts, washers, and screws, each serving specific purposes in construction and engineering applications.

Duplex fasteners typically include grades such as UNS S31803 (2205) and UNS S32205, among others. These fasteners are known for their durability and are commonly used in applications where resistance to chloride stress corrosion cracking is essential. They are widely employed in chemical processing, oil and gas, and marine engineering.

Super Duplex fasteners take corrosion resistance to the next level by incorporating even higher levels of chromium, molybdenum, and nitrogen. Grades like UNS S32750 (2507) and UNS S32760 offer outstanding corrosion resistance in aggressive environments, such as those containing acids, seawater, and other harsh chemicals. The superior strength and corrosion resistance of Super Duplex fasteners makes them suitable for use in demanding applications, including offshore and subsea oil and gas operations, chemical processing plants, and desalination facilities.

The features of Duplex and Super Duplex fasteners include high tensile strength, excellent corrosion resistance, good weldability, and a cost-effective balance of properties compared to other stainless steel grades. These fasteners exhibit enhanced toughness and durability, making them ideal for use in environments with high temperatures, corrosive media, and high stress.

Applications of Duplex and Super Duplex fasteners span a wide range of industries. In the oil and gas sector, they are commonly used in pipelines, offshore platforms, and subsea equipment. Chemical processing plants utilize these Duplex fasteners for their resistance to corrosive chemicals. The marine industry benefits from their ability to withstand the harsh conditions of seawater. Additionally, Super Duplex fasteners find applications in desalination plants, pulp and paper mills, and various other industrial settings where corrosion resistance and high strength are paramount.