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Mumbai, India-based Fasteners Mart is a reliable fasteners supplier of premium quality fasteners with a wide variety of products supplied to aerospace, petrochemical, marine, and construction industries. Super Duplex Steel nuts are most sought after among the vast array of fasteners due to their superior strength, corrosive resistance, and long lifespan. Available in grades 2507 and 2205, the nuts have the ability to perform under tough conditions. Available in different shapes like hexagonal, square, and as per customer designs, Super Duplex Steel nuts are best suited for high pressure, high temperature, and corrosive applications.
Super Duplex Steel nuts consist of 25-30% chromium, 3-5% molybdenum, and 4-7% nickel, providing greater corrosion and stress-cracking resistance. The material is prepared to provide the advantages of austenitic and ferritic stainless steel. Super Duplex Steel nuts have a tensile strength of 700 MPa to 1,000 MPa and a yield strength of 500 MPa to 750 MPa. Their molybdenum and chromium contents are high, which gives them good resistance against crevice corrosion, pitting, and stress corrosion cracking. They also retain good strength at high temperatures, hence suitable for challenging applications where high temperature is involved.
| Standard | DIN, ASTM, BS and all International Standards |
| Specifications | ASTM A479 & ASME SA479 |
| UNS S32760 Nut and Bolts Size | M3 To M56 3/6″ to 2″ |
| Length | 3 to 200 MM |
| Super Duplex Steel 2207 Machine Screws Size | M1.6 To M12 |
| Duplex Steel 2205 Washers Size | M3 To M56 3/6″ to 2″ |
| Tensile Strength(MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) | Hardness Rockwell C (HR C) | |
| Super Duplex Steel Bolts | 760 | 550 | 15 | 32 Max |
| 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 nuts find widespread applications in industries requiring high strength and corrosion resistance. They are largely applied in the oil and gas, marine, chemical processing, and power generation industries. They are ideal for use in offshore platform applications, desalination units, chemical reactors, and pressure vessels, where usage in severe environments, i.e., high chloride levels and extreme temperatures, is prevalent. These nuts are also employed in holding together key equipment and infrastructure to provide long-term reliability and durability in corrosive and high-pressure applications.
We provide timely and safe delivery solutions for Super Duplex Steel nuts, delivering them in their pristine condition. Packaging involves HDPE bags, corrugated boxes, and bespoke wooden crates that cushion the nuts during transport. Every package is tightly sealed to avoid damage during transit, resulting in safe and prompt delivery to customers.
The Fasteners Mart is a leading manufacturer and supplier of high-quality fasteners in Mumbai, India, with over 8 years of experience serving global industries.
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