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Sayam Nickel Alloys is a trusted manufacturer and supplier of Duplex Steel Fasteners in Hyderabad, offering high-strength fastening solutions for demanding industrial environments. Manufactured using premium-quality raw materials and advanced machining processes, these fasteners provide excellent dimensional accuracy, durability, and corrosion resistance. Sayam Nickel Alloys follows strict quality control procedures and international standards to ensure reliable performance. Their duplex steel fasteners are widely used in critical applications where strength, safety, and long-term service life are essential.
| Specifications | : | ASTM A182 / ASME SA182 |
| Size | : | 1/8″ NB TO 24″ NB |
| Standards | : | ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc. |
| Class / Pressure | : | 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc. |
| Standard | : | ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, etc. |
| Grades | : | S31803 / S32205 A182 Gr F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F6 |
| 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 % |
| Grade | YS (MPa) | UTS (MPa) | % Elongation | Hardness(BHN) |
| UNS S32750 | 550 min. | 795 min. | 15 min. | 310 max. |
| UNS S32760 | 550 min. | 750 min. | 25 min. | 270 max. |
Duplex Steel Fasteners are produced from alloys with a balanced austenitic and ferritic microstructure. The composition typically includes chromium, nickel, molybdenum, and nitrogen, which enhance corrosion resistance and mechanical strength. High chromium and molybdenum content improve resistance to pitting, crevice corrosion, and stress corrosion cracking. Mechanically, these fasteners offer high yield and tensile strength, excellent toughness, and good fatigue resistance. They perform reliably under high pressure, fluctuating loads, and moderate-to-high temperature conditions.
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Duplex Steel Fasteners are widely used in industries where reliable fastening in corrosive environments is critical. Common applications include oil and gas installations, petrochemical plants, chemical processing equipment, marine structures, and offshore platforms. They are also used in power generation, desalination plants, and pressure vessels. Due to their excellent resistance to chlorides and harsh chemicals, duplex steel fasteners are ideal for flanges, valves, pumps, and structural assemblies requiring high strength, corrosion resistance, and long service life.
