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From the heart of Kinshasa, Okoye Nickel Alloys is a trusted partner for industries demanding the very best in material performance. We specialize in supplying high-integrity Duplex Steel Nuts, engineered to withstand the most aggressive environments. Our commitment goes beyond mere supply; we deliver reliability, ensuring that every component meets the rigorous demands of both local and international projects. We understand that the strength of your work often depends on the smallest components, and that’s a responsibility we take very seriously.
The remarkable strength of Duplex Steel Nuts comes from their unique composition, which blends chromium, nickel, molybdenum, and nitrogen. This specific mix gives them a dual-phase microstructure, resulting in exceptional mechanical properties. They offer a tensile strength nearly double that of standard austenitic stainless steels, along with outstanding resistance to corrosion and stress corrosion cracking. This combination of toughness and durability makes them far superior for challenging applications where failure is not an option.
|
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 Okoye Nickel Alloys, we take pride in being the largest supplier, exporter, and manufacturer of Duplex Steel Nuts in Kinshasa, Congo, providing cutting-edge solutions for all your piping needs. Our state-of-the-art production plants are strategically located in the Congo, 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 the go-to choice for critical applications where extreme strength and corrosion resistance are non-negotiable. You’ll find them securely fastening components in offshore oil and gas platforms, chemical processing plants, and desalination facilities, standing up to saltwater and harsh chemicals. They are also essential in pulp and paper manufacturing, and in the construction of bridges and other structures in coastal areas. Essentially, these nuts are used wherever longevity and unwavering performance under pressure are absolutely essential.
