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Yasin Fasteners, an Istanbul, Turkey-based company, is a leading maker and supplier of **Super Duplex Steel fasteners** providing sound solutions for applications demanding high strength and corrosion resistance. Produced from high-performance grades like **S32750** and **S32760**, these fasteners are designed to perform under aggressive environments like offshore, marine, chemical, and high-pressure systems. Yasin Fasteners offers an extensive variety of Super Duplex fasteners—bolts, nuts, washers, screws, and stud bolts—all manufactured to international standards and in standard as well as in custom sizes to suit respective project needs in precision and endurance.
Super Duplex Steel fasteners have a two-phase austenitic-ferritic microstructure and are alloyed with high chromium (24–26%), molybdenum (3–4%), nickel (6–8%), and nitrogen. This alloy offers excellent resistance to pitting, crevice corrosion, and stress corrosion cracking in chloride-bearing and aggressive chemical environments. The Super Duplex fasteners have yield strength of 550–620 MPa and tensile strength of up to 860 MPa and are almost twice as strong as most conventional stainless steels. Due to their superior mechanical properties, coupled with superior fatigue strength and thermal stability, Super Duplex fasteners are well-suited for severe service conditions.
| Specification | IS, BS, ASTM, ASME |
| Grade | Super Duplex Steel | UNS S32750 | S32760 |
| Standard | ASTM A479 ASME SA479 |
| Length | 3mm to 200mm |
| Form | Screw, Nuts, Bolts, Washers |
| Size | 3/6″ to 2″, M3 – M56, Custom Sizes |
| Application | Oil & Gas, Heat exchanger and condenser, Automobile Industry, Engineering, Power plants, Refineries & Petrochemicals, Ship building, Desalination Plants |
| Phosphorus | Sulphur | Silicon | Carbon | Manganese | Nickel | Molybdenum | Nitrogen | Copper | Chromium |
|---|---|---|---|---|---|---|---|---|---|
| 0.035 % max | 0.02 % max | 0.80 % max | 0.03% Max | 1.20 % max | 6.00 – 8.00 % | 3.00 – 5.00 % | 0.24 – 0.32 % | 0.50 % max | 24.0 – 26.0 % |
To satisfy our clients needs by providing high quality products at competitive price as per the schedule and to maintain long term relationship with our clients.
Super Duplex Steel bolts and nuts are employed in rigorous industries where corrosion resistance and high mechanical performance are both required. In the **offshore oil and gas** industry, they play a crucial role in subsea pipelines, flanges, and structural connections. In **chemical and petrochemical** processing, they hold equipment exposed to harsh acids and chlorides. In **marine environments**, they are resistant to saltwater corrosion in shipbuilding and terminal facilities. Other uses are **desalination plants**, **power generation**, and **pulp and paper processing**. Due to their extended service life and low maintenance, Super Duplex fasteners are a cost-saving and reliable option for vital infrastructure and equipment.
We understand the importance of safe packaging of our Super Dupex Steel fasteners hence we ensure that they get to you in the best condition. Every fastener is covered with protective materials to ensure that they do not get damaged, rust or get contaminated in the course of transportation. We utilize sturdy cartons and we can also provide you with personalized packaging depending on your needs. Clear labeling and proper packing make it easier to identify and handle the products, thus proving our point that we value the quality of our products and the manner in which they are handled.
Yasin Fasteners is a leading manufacturer and supplier of high-quality fasteners in Istanbul, Turkey, with over 8 years of experience serving global industries.
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