Duplex and Super Duplex Fasteners – High Strength & Corrosion-Resistant Solutions
Duplex and Super Duplex Fasteners are engineered to deliver exceptional strength, durability, and corrosion resistance by combining the benefits of ferritic and austenitic stainless steels. These fasteners are ideal for industries operating in harsh environments such as oil & gas, marine, offshore, desalination, chemical, and power generation plants, where standard stainless steel fasteners may fail.
Types of Duplex & Super Duplex Fasteners
At AstroForge Fitting Industries, we supply a wide range of precision-engineered fasteners:
♦ Bolts, Stud Bolts, Hex Head Bolts, Socket Head Screws
♦ Anchor Bolts, U-Bolts, J-Bolts, T-Head Bolts
♦ Mushroom Head Square Neck Bolts, Wing Screws, Nuts, and Washers
Available in metric sizes (M3–M56) and inch sizes (3/6″–2″), our fasteners suit everything from small assemblies to heavy industrial projects.
Grades of Duplex/Super Duplex Fasteners
We manufacture fasteners in premium grades, ensuring superior performance and resistance to pitting, crevice corrosion, and stress cracking:
♦ UNS S31803 (F51): Excellent resistance to stress corrosion cracking; widely used in chemical & petrochemical industries.
♦ UNS S2205 (F60): High resistance to corrosion and pitting, ideal for offshore and desalination projects.
♦ UNS S32750 (F53): A super duplex grade offering exceptional strength and chloride resistance for marine & oil industries.
♦ UNS S32760 (F55): Known for toughness in the harshest chemical, marine, and power generation environments.
Key Benefits of Duplex & Super Duplex Fasteners
♦ Outstanding Corrosion Resistance – Protects against seawater, acids, and chlorides.
♦ High Strength & Durability – Performs under extreme pressures and temperatures.
♦ Versatility – Suitable for oil rigs, chemical plants, desalination, and marine structures.
♦ Cost-Effective Alternative – Provides performance comparable to superalloys at lower costs.
Why Choose AstroForge?
At AstroForge Fitting Industries, we specialize in Duplex and Super Duplex fasteners that comply with ASTM, ASME, DIN, and ISO standards. Our products undergo strict quality checks and are trusted worldwide for long-lasting, reliable fastening solutions.
👉 Get in touch with us today for Duplex and Super Duplex fasteners that guarantee strength, performance, and corrosion resistance in the toughest environments.
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Explore moreFAQs - Duplex/ Super Duplex Fasteners
Duplex fasteners combine ferritic and austenitic steel properties, offering double strength, higher durability, and excellent corrosion resistance compared to standard stainless steels in critical applications.
They are widely used in oil and gas, marine, petrochemical, desalination, and power industries, where exceptional strength and resistance to chloride-rich, corrosive environments are essential.
Options include stud bolts, hex bolts, anchor bolts, U-bolts, J-bolts, T-head bolts, mushroom head bolts, socket screws, and wing screws for diverse needs.
They are available in metric sizes M3–M56 and inch sizes 3/6 inch to 2 inches, suiting small installations and heavy industrial requirements.
Duplex stainless steels provide balanced strength and corrosion resistance, while super duplex grades enhance resistance to chlorides, pitting, and crevice corrosion, especially in seawater environments.
Popular grades include UNS S31803 (F51), UNS S2205 (F60), UNS S32750 (F53), and UNS S32760 (F55), each offering tailored performance for demanding environments.
UNS S32750 super duplex fasteners provide outstanding resistance to seawater pitting and crevice corrosion, making them ideal for offshore platforms, ships, and desalination plants.
UNS S31803 duplex stainless steel fasteners resist stress corrosion cracking and general corrosion, making them reliable in chemical, petrochemical, and power generation applications.
Yes, duplex and super duplex alloys provide high performance at lower costs compared to nickel alloys, delivering long-term durability in aggressive and high-pressure applications.
Duplex and super duplex fasteners resist chloride-induced corrosion, ensuring structural integrity, reliability, and cost efficiency in desalination plants where seawater exposure is constant.