Duplex Steel Fasteners

Duplex steel fasteners are high performance fastening components produced from a combination of ferritic and austenitic stainless steels. They are known for their high characteristics and are perfect for applications with high requirements. The microstructure of the duplex steel offers very high resistance to stress corrosion cracking, pitting, and crevice corrosion which makes this material ideal for use in applications where reliable and long-lasting performance is desired. 

Features of Duplex Steel Fasteners

Duplex steel fasteners boast several key features that enhance their performance and suitability for challenging environments:

• High Strength: Duplex steel fasteners have greater tensile and yield strength than that of standard stainless steels, thereby guaranteeing them the capacity to bear loads and mechanical forces. 
• Excellent Corrosion Resistance: Duplex Steel Fasteners possess excellent resistance to pitting, crevice and stress corrosion cracking. 
• Good Toughness: The specific characteristics of the ferritic and austenitic phases in the structure of the duplex steel are high impact toughness and resistance to brittle fracture at low temperatures. 
• Reduced Thermal Expansion: Duplex steel has a lower coefficient of thermal expansion which is important in maintaining the shape and hence the strength of the material under conditions of changing temperatures. 
• Enhanced Fatigue Resistance: The enhanced material properties, such as the high strength and toughness of Duplex Steel Fasteners, make the system more resistant to cyclic loading and fatigue, hence increasing the life of the fasteners. 
• Cost-Effectiveness: Austenitic stainless steel fasteners are usually more expensive materials, while duplex steel fasteners are usually more economical materials with better cost to performance ratio. 
• Ease of Fabrication: Duplex steel is relatively easy to machine and weld, hence making it easier to manufacture and assemble. 

Duplex steel fasteners are characterised by very interesting properties, which makes them suitable for use in various industries. 

Application of Duplex Steel Fasteners

Duplex steel fasteners are used in many industries to serve in different capacities. Key applications include: 

• Oil and Gas Industry: Duplex steel fasteners are used in areas such as offshore platforms, pipelines and pressure vessels in the form of flanges, bolts and nuts. 
• Chemical Processing: Chemical processing industry uses duplex steel fasteners in reactors, distillation columns, and storage tanks. 
• Marine and Offshore Structures: Duplex steel fasteners are ideal for use in shipbuilding, offshore structures and other structures located in coastal regions. 
• Power Generation: Duplex steel fasteners are used in parts like heat exchanger, steam turbine, and boiler system. 
• Pulp and Paper Industry: Duplex steel fasteners are used in equipment which are exposed to chemical and processing operations such as paper mill and pulp processing plants. 
• Water Treatment Plants: Duplex steel fasteners are used in equipment and infrastructure for desalination and water treatment pumps valves and filtration systems. 
• Construction and Infrastructure: Duplex steel fasteners are applied in areas such as in bridge construction, high rise buildings and other structures which require higher strength and durability. 

Duplex steel fasteners are used in applications where high strength and corrosion resistance are essential.