Duplex Stainless Steel fasteners are widely used for critical applications that demands a combination of excellent corrosion resistance and high strength. The material has very high strength, even in annealed condition, and is therefore difficult to cold form.

Duplex stainless steel fasteners are specialized fasteners made from duplex stainless steel, a type of stainless steel alloy with a two-phase microstructure consisting of roughly equal parts austenitic and ferritic phases. This unique structure provides duplex stainless steel with a combination of properties that make it ideal for a wide range of applications, including fasteners in various industries.

Here are some key characteristics and advantages of duplex steel fasteners:

Corrosion Resistance: Duplex stainless steel offers excellent corrosion resistance, particularly in aggressive environments such as seawater, chloride-rich atmospheres, and chemical processing plants. Its resistance to pitting, crevice corrosion, and stress corrosion cracking is superior to that of many other stainless steel alloys.

High Strength: Duplex steel fasteners exhibit high strength and toughness, allowing them to withstand heavy loads and mechanical stresses. This makes them suitable for structural applications where strength and reliability are paramount.

Fatigue Resistance: Duplex stainless steel has good fatigue resistance, which is essential for fasteners subjected to cyclic loading or vibration. This property helps prevent premature failure and extends the service life of the fasteners.

Temperature Stability: Duplex steel maintains its mechanical properties and corrosion resistance over a wide range of temperatures, making it suitable for applications in both cryogenic and elevated-temperature environments.

Cost-Effectiveness: While duplex stainless steel fasteners may have a higher initial cost compared to conventional stainless steel alloys, they often provide significant cost savings over the long term due to their extended service life, reduced maintenance requirements, and lower risk of corrosion-related failures.

Duplex steel fasteners are used in various industries, including offshore oil and gas, chemical processing, marine engineering, pulp and paper, and structural engineering. Common types of duplex steel fasteners include bolts, nuts, screws, washers, and studs, available in different sizes, grades, and surface finishes to suit specific application requirements. Their versatility, durability, and corrosion resistance make them valuable components in critical infrastructure and industrial equipment.