Home > Duplex Steel > Duplex Steel Nuts
At Nasir Nickel Alloys in Manama, Bahrain, Duplex Steel Nuts are engineered to provide superior strength, corrosion resistance, and reliability in demanding industrial environments. Made from duplex stainless steel alloys, these nuts combine the toughness of ferritic steel with the ductility of austenitic steel, offering high tensile strength and excellent resistance to stress-corrosion cracking. Designed for critical fastening applications, Duplex Steel Nuts maintain structural integrity and dimensional stability under high-pressure, corrosive, and elevated-temperature conditions. Their durability ensures long-term performance in chemical, petrochemical, offshore, marine, and power generation industries where reliability is essential.
Duplex Steel Nuts are composed of a balanced mix of austenitic and ferritic phases, with high chromium (20–25%), nickel (5–7%), and molybdenum (2–3%) content. This combination provides exceptional tensile and yield strength while maintaining toughness and ductility. They exhibit excellent resistance to pitting, crevice corrosion, and chloride-induced stress-corrosion cracking. Duplex Steel Nuts maintain dimensional stability during thermal cycling and mechanical loading, ensuring secure fastening. The alloy’s unique blend of mechanical strength and corrosion resistance makes it suitable for demanding industrial applications requiring durability and long-term performance.
|
Material |
Specification |
Standards |
Size
|
Length |
|
Duplex Steel
|
IS
BS
ASTM
|
ASTM / ASME – A/ SA 479 / 479 |
3 mm
to
200 mm
|
M02 to M30
|
| Cr | N | Ni | C | Mn | Si | P | S | Mo | |
|---|---|---|---|---|---|---|---|---|---|
| S31803 | min: 21.0 max: 23.0 | min: 0.08 max: 0.20 | min: 4.5 max: 6.5 | 0.03 max | 2.0 max | 1.0 max | 0.03 max | 0.02 max | min: 2.5 max: 3.5 |
| S32205 | min: 22.0 max: 23.0 | min: 0.14 max: 0.20 | min: 4.5 max: 6.5 | 0.03 max | 2.0 max | 1.0 max | 0.03 max | 0.02 max | min: 3.0 max: 3.5 |
Grade | Tensile Strength (MPa) min | Elongation (% in 50mm) | Yield Strength 0.2% Proof (MPa) min | Hardness Rockwell C (HR C) |
|---|---|---|---|---|
UNS-S 31803 | 650-880 | 25 | 448 | |
UNS-S 32205 | 621 | 25 | 448 | 21 max |
At Nasir Nickel Alloys, we take pride in being the largest supplier, exporter, and manufacturer of Duplex Steel Nuts in Manama, Bahrain, providing cutting-edge solutions for all your piping needs. Our state-of-the-art production plants are strategically located in the Bahrain, 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.
Duplex Steel Nuts are widely used in industries that require high strength and resistance to corrosion. They are commonly applied in chemical processing plants, including reactors, heat exchangers, and pipelines exposed to aggressive chemicals and chlorides. Power generation facilities use them in boilers, turbines, and high-pressure piping systems. Offshore and marine industries rely on these nuts for seawater-exposed structures and equipment. Petrochemical and refinery operations utilize them in valves, pumps, and structural assemblies. Duplex Steel Nuts provide secure, long-lasting fastening solutions in critical systems operating under high stress, corrosive environments, and elevated temperatures.
