Home > Super Duplex Steel Nuts
Majid Fasteners, a top-notch manufacturer and supplier located in Dubai, UAE, specializes in high-quality Super Duplex Steel Nuts that are perfect for high-performance applications in the toughest environments. These nuts are made from advanced super duplex stainless steel alloys, which are renowned for their incredible strength, resistance to corrosion, and long-lasting durability. Majid Fasteners is committed to precision manufacturing, rigorous testing, and strict adherence to global quality standards, making their Super Duplex Steel Nuts a go-to choice for critical industries. With exceptional resistance to pitting, crevice corrosion, and stress-corrosion cracking, these nuts provide dependable fastening solutions for offshore structures, chemical processing, marine systems, and oil and gas facilities.
Super Duplex Steel Nuts are crafted from alloys like UNS S32750 and UNS S32760, which boast high levels of chromium (24–26%), molybdenum (3–4%), and nitrogen to enhance corrosion resistance. They feature a unique dual-phase microstructure that combines both ferritic and austenitic properties. On the mechanical side, these nuts deliver outstanding tensile strength, impressive impact toughness, and superior resistance to chloride-induced stress-corrosion cracking. Their metallurgical stability guarantees reliable performance even in high-pressure and high-temperature settings, making them ideal for the most demanding industrial applications.
| Standard | ASTM B564, ASME SB564 |
| Specification | DIN, ASTM, BS and all International Standards |
| Flat bar blocks | up to 27″ width and 15,000 lbs. |
| Cylinders and sleeves | up to 50″ maximum O.D. and 65″ maximum length |
| Discs and hubs | up to 50″ diameter and 20,000 lbs. |
| Rolled, hand forged or mandrel forged rings | up to 84″ maximum O.D. and 40″ maximum length |
| Rounds, shafts and step shafts | up to 144″ maximum length and 20,000 lbs. |
| Forging Types | Impression Die Forging, Open Die Forging, Seamless Rolled Forging, Hot Forging, Cold Forging, Open die hammer forging, Impression die drop forging, Closed Die Forging, Press Forging, Upset Forging, Compression Forging, Swaging, Rotary Forging, Roll forging. |
| Grade | C | Mn | Si | S | Co | Ni | Cr | Fe | Mo | P |
| Hastelloy B2 | 0.02 max | 1.0 max | 0.1 max | 0.03 max | 1.0 max | Bal | 1.0 max | 2.0 max | 26 – 30 | 0.04 max |
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 9.2 g/cm3 | 1370 °C (2500 ºF ) | Psi – 1,10,000, MPa – 760 | Psi – 51000, MPa – 350 | 40 % |
| STANDARD | WERKSTOFF NR. | UNS |
| Hastelloy B2 | 2.4617 | N10665 |
Super Duplex Steel Nuts find their place in various industries that require exceptional strength and corrosion resistance, especially in environments rich in chlorides and other corrosive elements. They are commonly used in offshore platforms, subsea equipment, and marine engineering due to their remarkable resistance to seawater. Chemical processing plants depend on these nuts for reactors, pumps, valves, and heat exchangers that are exposed to harsh chemicals. In the oil and gas industry, they are essential components in pipelines, manifolds, and other critical applications.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
