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Aisha Nickel Alloys is a reputable manufacturer and supplier of Duplex Steel Fasteners, proudly based in Muscat, Oman. They cater to a variety of industrial needs throughout the Middle East and beyond. Renowned for their unwavering quality and precision engineering, the company provides an extensive selection of duplex fasteners, including bolts, nuts, screws, studs, and washers. Crafted with cutting-edge techniques and rigorous quality control, these fasteners boast exceptional strength, corrosion resistance, and durability. Aisha Nickel Alloys is dedicated to adhering to international standards while delivering dependable solutions for challenging environments like marine, oil and gas, petrochemical, and infrastructure projects.
Duplex Steel Fasteners feature a well-balanced microstructure of austenite and ferrite, typically comprising chromium (21–23%), nickel (4.5–6.5%), molybdenum (2.5–3.5%), and a controlled amount of nitrogen. This unique composition grants them remarkable resistance to pitting, crevice corrosion, and stress corrosion cracking. On the mechanical side, duplex fasteners provide higher tensile and yield strength compared to standard austenitic stainless steels, along with impressive impact toughness. Their low thermal expansion, high fatigue strength, and robust load-bearing capacity make them ideal for high-pressure and high-temperature applications.
| Specifications | : | ASTM A182 / ASME SA182 |
| Size | : | 1/8″ NB TO 24″ NB |
| Standards | : | ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc. |
| Class / Pressure | : | 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc. |
| Standard | : | ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, etc. |
| Grades | : | S31803 / S32205 A182 Gr F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F6 |
| 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 % |
| Grade | YS (MPa) | UTS (MPa) | % Elongation | Hardness(BHN) |
| UNS S32750 | 550 min. | 795 min. | 15 min. | 310 max. |
| UNS S32760 | 550 min. | 750 min. | 25 min. | 270 max. |
At Aisha Nickel Alloys, we take pride in being the largest supplier, exporter, and manufacturer of Duplex Steel Fasteners in Muscat, OMAN, providing cutting-edge solutions for all your piping needs. Our state-of-the-art production plants are strategically located in the OMAN, allowing us to maintain a vast inventory of over 16,000 tons of premium-quality materials readily available in stock. We are dedicated to delivering superior products and services, ensuring reliability and excellence for our global clientele.
Contact us to get a quick quote for your requirement.
Duplex Steel Fasteners are commonly utilized in industries where strength and corrosion resistance are paramount. They find extensive use in oil and gas platforms, offshore structures, petrochemical plants, desalination units, and marine engineering, thanks to their resistance to chloride-induced corrosion. These fasteners are also favored in chemical processing equipment, heat exchangers, pressure vessels, and pipelines. In construction and infrastructure projects, duplex fasteners ensure long-lasting reliability even in harsh environmental conditions.