Duplex Fasteners Manufacturer, Supplier & Exporter in India Introduction
In challenging environments where both strength and corrosion resistance are crucial, duplex fasteners offer a superior solution. Manufactured from duplex stainless steel, these fasteners combine the qualities of austenitic and ferritic steels making them highly durable, cost-effective, and reliable.
These fasteners are manufactured using duplex stainless steel, which is a microstructure consisting of approximately equal parts of austenite and ferrite. This unique composition offers the benefits of both microstructures, making duplex fasteners a preferred choice in industries such as oil & gas, petrochemical, marine, construction, and more.
Ananka Fasteners is a trusted manufacturer of premium Duplex Fasteners in India, providing an extensive range of high-strength, corrosion-resistant fasteners in various grades, dimensions, and specifications for demanding industrial applications.
What are Duplex Fasteners?
Duplex fasteners include bolts, nuts, washers, studs, threaded rods, and screws made from duplex stainless steel. These fasteners offer:
High mechanical strength (almost double that of standard austenitic stainless steel)
Good weldability and formability
High fatigue strength and toughness
Grades of Duplex Stainless Steel Used
Ananka Fasteners manufactures duplex fasteners using the following popular grades:
Types of Duplex Fasteners We Manufacture
1. Duplex Bolts
Hex Head Bolts
Heavy Hex Bolts
Flange Bolts
U Bolts
Carriage Bolts
Stud Bolts
2. Duplex Nuts
Hex Nuts
Heavy Hex Nuts
Lock Nuts
Dome Nuts
Coupling Nuts
3. Duplex Washers
Plain Washers
Spring Washers
Lock Washers
Flat Washers
4. Duplex Screws
Machine Screws
Self-tapping Screws
Socket Head Cap Screws
Wood Screws
5. Duplex Threaded Rods & Studs
Fully Threaded Rods
Double-end Studs
Tap-end Studs
Duplex Fasteners Specifications & Standards
We manufacture duplex fasteners according to the following international standards:
ASTM A276 / A479 – Stainless steel bars and rods
ASTM A193 / A194 – Bolting Materials for High Temperature or Pressure Service
ASME B18.2.1, B18.2.2, B18.3 – Dimensional Standards
DIN, ISO, JIS, BS – Global Fastening Standards
Applications of Duplex Fasteners
Offshore Oil & Gas Rigs
Chemical Processing Equipment
Desalination Plants
Marine and Shipbuilding
Heat Exchangers and Condensers
Power Generation and Energy Sectors
Structural Components in Buildings & Bridges
Why Choose Ananka Fasteners for Duplex Fasteners?
In-House Manufacturing Facility
We operate a state-of-the-art manufacturing plant in Vasai, Maharashtra, equipped with modern machinery and quality control labs.
Strict Quality Control
Every fastener is tested for tensile strength, hardness, corrosion resistance, and dimensional accuracy before dispatch.
Custom Solutions
From non-standard sizes to specialized coatings (PTFE, Zinc, Hot Dip Galvanized), we offer tailor-made solutions for your project needs.
Global Export Network
We supply duplex fasteners to countries across Europe, the Middle East, Asia, Africa, and the Americas, ensuring timely delivery and complete documentation support.
Packaging & Delivery
Packaging: Wooden boxes, HDPE bags, bubble wraps, or as per customer request.
Delivery: Domestic and international shipping with clear markings, heat numbers, and traceability.
Conclusion
If you're looking for a reliable Duplex Fasteners Manufacturer, Ananka Fasteners is your trusted partner. Our premium quality, commitment to precision engineering, and vast export experience make us the first choice for businesses worldwide. Whether it's a complex offshore application or a structural requirement, our duplex fasteners are engineered to perform flawlessly in harsh environments.
FAQs – Duplex Fasteners
Q1. What’s the difference between Duplex and Super Duplex Fasteners?
Super Duplex fasteners contain elevated levels of chromium, molybdenum, and nitrogen, delivering superior strength and enhanced corrosion resistance compared to standard duplex grades.
Q2. Are duplex fasteners magnetic?
Yes, duplex stainless steels have a ferritic structure that makes them slightly magnetic, unlike austenitic stainless steels.
Q3. Can duplex fasteners withstand seawater?
Yes, especially Super Duplex grades like S32750 and S32760 are highly resistant to seawater corrosion.
Q4. Do you provide test certificates for duplex fasteners?
Absolutely. We provide EN 10204 3.1 / 3.2 certification, third-party inspection reports, and all relevant material test reports.
Q5. What coatings are available for duplex fasteners?
We offer coatings like PTFE, Xylan, Zinc, Hot Dip Galvanized, and custom finishes on request.
