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Located in the heart of Kinshasa, Okoye Nickel Alloys stands as a dedicated source for high-performance materials, with a specialized focus on Duplex Steel Bars. We understand the demanding environments faced by local industries, which is why we provide these robust alloys directly to our clients. Our commitment is to support the growth and resilience of Congolese projects by ensuring a reliable supply of materials that are built to endure, combining exceptional strength with superior corrosion resistance for the most challenging applications.
The strength of Duplex Steel Bars comes from their unique composition, which is a careful balance of chromium, nickel, molybdenum, and nitrogen. This blend gives them a two-phase micro-structure that results in remarkable mechanical properties. They offer nearly double the yield strength of standard austenitic stainless steels, along with excellent toughness and ductility. This means they can withstand high stress and impact while providing outstanding resistance to pitting and crevice corrosion, making them a truly versatile material for heavy-duty use.
| Duplex Steel Bar Standard | ASTM A276, AMS 5513, AMS 5511, AMS 5647 |
|---|---|
| Duplex Steel Bar Dimensions | EN, DIN, JIS, ASTM, BS, ASME, AISI |
| Duplex Steel Round bar size | Diameter: 3-~800mm |
| Duplex Steel Hex Bar size | 2-100mm A/F |
| Duplex Stainless Steel Flat bar size | Thickness: 2 -100mm |
| Width: 10 to 500mm | |
| Duplex Steel Square bar size | 4 to 100mm |
| Duplex Steel Angle bar size | 3mm*20mm*20mm~12mm*100mm*100mm |
| Duplex Rectangular Bars Section | 3.0 to 12.0mm thickness |
| Duplex Steel Channel Bar | 80 x 40mm to 150 x 75mm section; 5.0 to 6.0mm thickness |
| ASTM A276 Type Hollow Bar | 32mm OD x 16mm ID to 250mm OD x 200mm ID) |
| Duplex Stainless Steel Threaded Bar Billet Size | 1/2 to 495mm Diameter |
| Duplex Steel Rectangular Size | 33 x 30mm to 295 x 1066mm |
| Duplex Hex Bars Finish | Cold (bright) drawn, centreless ground, hot rolled, smooth turned, peeled, slit rolled edge, hot rolled annealed, Rough Turned, Bright, Polish, Grinding, Centreless Ground & Black |
| ASTM A276 Type Hollow Bar Tolerance | H8, H9, H10, H11, H12, H13K9, K10, K11, K12 or as per clients’ requirements |
| SAF 2507 T-Bar Surface | Bright, Hot Rolled Pickled, Cold Drawn, Sand Blasting Finished, Polished, Hairline |
| Rolled Duplex Steel Flat Bars Condition | Hardened & tempered, annealed |
| ASTM A276 Type Cold Rolled Bar Technique | Duplex Hot Rolled, Cold Drawn, Cold Rolled, Forged Round Bar, Rod |
| Duplex Rod Processing | Bar cutting to 650mm |
| Duplex Rounds Bar Form | Round, Rod, T-Bar, Channel Bar, Precision Ground Bar, Flat Bar, Square, Blocks, Round Rod, Rings, Hollow, Triangle, Rectangle, Hex (A/F), Threaded, Half Round Bar, Profiles, Billet, Ingot, I/H Bar, Forging etc. |
| Grade | UNS No | C % | Cr % | Ni % | P % | Si % | S % | Mo % | N % | Mn % |
| S31803 | S31803 | < 0.03 | 21.0-23.0 | 4.5-6.5 | 1.03 max | 1 max | 0.02 max | 2.5-3.5 | 0.08-0.2 | < 2.0 |
| 2205 | S32205 | < 0.03 | 22.0-23.0 | 4.5-6.5 | 0.03 max | 1 max | 0.02 max | 3.0-3.5 | 0.14-0.20 | < 2.0 |
| Grade | YS (MPa) | UTS (MPa) | % Elongation | Hardness(BHN) |
| S31803 | 450 min. | 620 min. | 25 min. | 293 max. |
| 2205 | 450 min. | 655 min. | 25 min. | 293 max. |
At Okoye Nickel Alloys, we take pride in being the largest supplier, exporter, and manufacturer of Duplex Steel Bars 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.
The exceptional qualities of Duplex Steel Bars make them a perfect fit for a wide range of demanding applications, particularly in industries where both strength and corrosion resistance are non-negotiable. You will find them at the heart of chemical processing plants, oil and gas extraction equipment, and in the demanding environments of marine and offshore structures. They are also ideally suited for components in desalination units, bridges, and even architectural features in aggressive coastal climates, offering a long service life and reduced maintenance needs.
