Duplex Steel 2205 UNS S32205 Hex Bars are a premium-grade stainless steel known for their excellent combination of strength and corrosion resistance. They are widely used in industries where both high mechanical properties and resistance to aggressive environments are required. The unique duplex microstructure consists of nearly equal parts of austenite and ferrite, providing enhanced toughness and ductility. These hex bars are commonly employed in chemical processing, oil and gas, marine, and desalination plants. With their high chromium, molybdenum, and nitrogen content, they resist pitting, stress corrosion cracking, and crevice corrosion. Duplex 2205 bars are ideal for applications requiring reliable performance in harsh environments. They can be easily machined, welded, and fabricated to precise specifications.

The mechanical strength of Duplex 2205 hex bars is significantly higher than standard austenitic stainless steels. They offer yield strength of approximately 450 MPa and tensile strength of around 620–880 MPa. This makes them suitable for heavy-duty applications such as pressure vessels, pump shafts, and structural components. Despite their high strength, these bars maintain excellent toughness, even at sub-zero temperatures. The combination of superior strength and ductility allows designers to use thinner sections, reducing overall weight and material cost. Duplex 2205 is also highly resistant to fatigue, which ensures long-term reliability in cyclic loading applications. Their enhanced corrosion resistance extends the service life of equipment in chloride-rich environments.

Duplex Steel 2205 UNS S32205 hex bars have a chemical composition that ensures their unique properties. Typically, they contain 22% chromium, 5–6% nickel, 3% molybdenum, and 0.14–0.20% nitrogen. The balance of iron and small additions of manganese, silicon, and carbon improves the alloy’s strength and corrosion resistance. These elements work synergistically to enhance pitting and crevice corrosion resistance, making them suitable for marine applications. Nitrogen also stabilizes the austenitic phase, increasing toughness and inhibiting stress corrosion cracking. The low carbon content reduces the risk of intergranular corrosion during welding. Overall, the composition makes Duplex 2205 hex bars a reliable material for demanding industrial environments.

Worldwide Duplex Steel 2205 UNS S32205 Hex Bars Manufacturer, Stockist and Exporter

Duplex 2205 hex bars are available in various sizes and dimensions to suit different applications. Hexagonal bars are commonly used for shafts, fasteners, and mechanical components where precise dimensional accuracy is required. Standard dimensions range from 10 mm to 200 mm across flats, but custom sizes can be manufactured. These bars are usually supplied in hot-rolled, cold-rolled, or annealed conditions depending on the application. Surface finishes can vary from mill finish to polished or passivated for better corrosion protection. The availability of multiple forms ensures that Duplex 2205 hex bars meet both structural and aesthetic requirements.

In terms of fabrication, Duplex 2205 hex bars can be machined using conventional techniques, though higher cutting forces may be required compared to austenitic steels. They exhibit good weldability, but care must be taken to avoid excessive heat input, which can alter the microstructure. Post-weld heat treatment is generally not required, but proper control during welding ensures that corrosion resistance is not compromised. Standard forming and bending techniques can be applied with appropriate considerations for spring-back due to high strength. The alloy’s dual-phase microstructure allows for excellent wear resistance, making it suitable for components exposed to friction or abrasive conditions.

Applications of Duplex Steel 2205 hex bars span multiple industries. In the oil and gas sector, they are used for offshore platforms, pipelines, and valves due to their high strength and corrosion resistance. In chemical plants, they handle acids and chlorides without degrading, ensuring safety and reliability. Marine applications benefit from their resistance to seawater corrosion. They are also used in desalination plants, heat exchangers, and pulp and paper industries. Duplex 2205 hex bars provide a cost-effective solution by reducing maintenance and replacement costs due to their long service life. Their robustness under extreme conditions makes them an ideal choice for critical infrastructure.

Quality standards and certifications ensure the reliability of Duplex 2205 UNS S32205 hex bars. They typically conform to ASTM A276, ASTM A479, and ASME standards, ensuring consistency in mechanical and chemical properties. Testing includes hardness, tensile, and corrosion resistance assessments. The bars are supplied with proper certification for traceability and quality assurance. By adhering to international standards, manufacturers guarantee that these hex bars perform reliably in demanding environments. Duplex 2205 hex bars are a trusted material choice for engineers and designers seeking a combination of high strength, durability, and excellent corrosion resistance.

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