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Fajar Nickel Alloys is your go-to manufacturer and supplier of Super Duplex Steel Nuts, proudly based in Jakarta, Indonesia. We specialize in high-performance nuts crafted from top-notch Super Duplex grades like S32750 and S32760, engineered to deliver outstanding strength, corrosion resistance, and durability even in the toughest conditions. These nuts find their place in various industries, including offshore, petrochemical, marine, and chemical sectors, where fasteners need to withstand high pressure and harsh, corrosive environments. Adhering to international standards such as ASTM A194, Fajar Nickel Alloys guarantees precise dimensions, top quality, and prompt delivery to clients both in Indonesia and around the globe.
Super Duplex Steel Nuts boast a composition of about 25% chromium, 7% nickel, 3–4% molybdenum, and nitrogen, which gives them a well-balanced austenitic-ferritic microstructure. This unique blend results in impressive tensile strength (up to 800 MPa), excellent yield strength (around 550 MPa), and remarkable resistance to pitting, crevice corrosion, and chloride-induced stress corrosion cracking. These features make the nuts perfect for long-term use in aggressive and high-pressure settings.
| Standard | : | ASTM A193 / A479, ASME SA193 / A479 |
| Dimension | : | ASTM,DIN, BS,GB, IS and all International Standards |
| Length | : | 3 mm to 200 mm |
| Nut Size | : | M02 to M33 | Custom Sizes |
| Heat Treatment | : | Annealing, Stress Relieving, Case Hardening, Quenching and Tempering. |
| Type | : | Hex Nut, Heavy Hex Nut, Lock Nut, Nylock Nut, Weld Nut, Dome Nut, Flange Nut, Square Nut, Eye Nut etc. |
| C | Cr | Ni | Mo | N | Others |
|---|---|---|---|---|---|
| 0.020 | 25 | 7 | 4.0 | .27 | S=0.001 |
| Ultimate Tensile Strength, ksi | 116 min. |
|---|---|
| 0.2% Offset Yield Strength 0.2%, ksi | 80 min. |
| 0.1% Offset Yield Strength 0.2%, ksi | 91 min. |
| Elongation in 2 inches, % | 15 min. |
| Hardness Rockwell C | 32 max. |
| Impact Energy, ft.-lbs. | 74 min. |
At Fajar Nickel Alloys, we take pride in being the largest supplier, exporter, and manufacturer of Super Duplex Steel Nuts in Jakarta, Indonesia, providing cutting-edge solutions for all your piping needs. Our state-of-the-art production plants are strategically located in the Indonesia, 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.
You’ll find Super Duplex Steel Nuts in critical fastening applications where high strength and corrosion resistance are non-negotiable. They’re commonly used in offshore drilling platforms, desalination systems, subsea equipment, marine structures, and chemical processing units. These nuts play a vital role in securing flanges, valves, pumps, and structural assemblies that are exposed to harsh chemicals or seawater. Their durability, resistance to corrosion fatigue, and minimal maintenance needs make them a reliable choice for heavy-duty and safety-critical installations across a wide array of industries.