Duplex Steel Fasteners are high-strength fastening components manufactured from duplex stainless steel alloys known for their excellent corrosion resistance, high mechanical strength, and superior resistance to stress corrosion cracking. These fasteners combine the advantages of austenitic and ferritic stainless steels, making them suitable for severe service environments.
Duplex Steel Fasteners are available in various forms such as bolts, nuts, screws, studs, washers, and threaded rods. They are widely used in oil & gas, chemical processing, marine, power generation, and offshore industries where durability and reliability are critical.
Duplex Steel Fasteners are available in standard duplex grades to meet demanding service conditions. The most commonly supplied grades include Duplex S31803 (UNS S31803) and Duplex S32205 (UNS S32205), offering outstanding corrosion resistance, high tensile strength, and long service life.
Duplex Steel Fastener Manufacturer in India | Duplex S31803 & S32205 Fastener Supplier
Applications of Duplex Steel Fasteners
| ● Oil & Gas Industry and Offshore Platforms |
| ● Chemical & Petrochemical Processing Plants |
| ● Marine & Seawater Applications |
| ● Pressure Vessels, Heat Exchangers & Piping Systems |
| ● Power Generation & Desalination Plants |
| ● Structural & Heavy Engineering Applications |
Specification Table of Duplex Steel Fasteners
| Standard | ASTM A182, ASTM A240, ASTM A479, ASTM F593, ASME B18, DIN, ISO |
|---|---|
| Fastener Type | Bolts, Nuts, Screws, Studs, Washers, Threaded Rods |
| Size | M3 to M72 / Custom Sizes Available |
| Thread Type | Metric / UNC / UNF / BSW |
| Surface Finish | Plain, Pickled, Passivated, Polished |
| Manufacturing | Hot Forged / Cold Forged / Machined |
Duplex Steel Fastener Grades (Sub-Products)
| ● Duplex S31803 – High strength and excellent corrosion resistance, widely used in pressure vessels, piping systems, and offshore structures |
| ● Duplex S32205 – Superior resistance to pitting, crevice corrosion, and stress corrosion cracking for aggressive environments |
Mechanical Properties of Duplex Steel Fasteners (Typical)
| Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation % |
|---|---|---|---|
| Duplex S31803 | 450 | 620 | 25 |
| Duplex S32205 | 450 | 620 | 25 |