Home > Super Duplex Screws
Request For Our Latest Prices On Super Duplex Screws in Delhi, India!
Punit Fasteners is a reputed manufacturer and supplier of super duplex screws in Delhi, India. These screws are designed for high-strength and resistance to corrosion in extreme conditions. Made from super duplex grades like S32750 and S32760, they have a dual-phase microstructure that performs exceptionally well in harsh environments. Our super duplex screws provide superior mechanical strength and resistance to chloride stress corrosion and are built for lasting durability. Punit Fasteners supplies these screws to many industries, including offshore oil and gas, desalination, chemical processing, and marine applications, ensuring quality and reliability in demanding projects.
Super duplex screws typically consist of about 25% chromium, 7% nickel, and 3.5-4% molybdenum, along with nitrogen. These components give excellent tensile strength of up to 1000 MPa and yield strength greater than 700 MPa, along with high resistance to corrosion in chloride settings. The duplex microstructure enhances toughness, fatigue resistance, and protection against stress corrosion cracking. These screws perform reliably in high-pressure, high-temperature, and saline conditions, offering a longer service life compared to standard stainless steel fasteners. They are ideal for critical applications that require high performance and minimal maintenance.
| 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 screws are widely used in marine structures, offshore oil platforms, subsea equipment, desalination plants, and chemical processing facilities. Their top-notch resistance to pitting, crevice corrosion, and chloride stress corrosion makes them suitable for environments with high salinity or aggressive chemicals. They work well in applications with high mechanical loads, vibrations, and temperature changes. In power plants, heat exchangers, and industrial pumps, these screws deliver leak-proof, corrosion-resistant assemblies. Their long service life and structural reliability reduce maintenance downtime, making them the preferred choice for critical infrastructure where safety and durability are vital.
At Punit Fasteners, We make sure that our Super Duplex Steel Screws are packed with the utmost of precaution. Every screw is covered separately to avoid any damages, rust or any other contaminant that may affect the screw during transportation. We employ sturdy cartons and provide customized packaging services depending on the client’s requirements. We ensure that our products are well packed and labeled to enhance identification and handling to ensure that the end consumer receives our products in the best condition.
Punit Fasteners is a leading manufacturer and supplier of high-quality fasteners in Delhi, India, with over 15 years of experience serving global industries.
©2024 Punit Fasteners All Rights Reserved.
