Semih Metals, located in Istanbul, Turkey, stands out as a top manufacturer and supplier of Duplex Steel Rectangular Bars, delivering high-performance steel solutions for industries that demand both strength and resistance to corrosion. Duplex steel is a unique alloy made up of roughly equal parts of austenite and ferrite, which gives it remarkable mechanical properties and excellent resistance to stress corrosion cracking. At Semih Metals, they prioritize precision manufacturing, rigorous quality control, and adherence to international standards. Their Duplex Steel Rectangular Bars come in a variety of sizes and grades, making them suitable for applications in chemical processing, oil and gas, marine engineering, and other challenging industrial settings.
Typically, Duplex Steel Rectangular Bars are composed of chromium (20–25%), nickel (4–7%), molybdenum (2–3%), nitrogen (0.14–0.20%), with iron making up the balance, along with trace amounts of manganese and other elements. This specific composition results in impressive tensile strength (up to 800–900 MPa), yield strength around 450–600 MPa, and hardness ranging from 220 to 280 HB, all while ensuring excellent ductility and toughness. The unique microstructure of duplex steel provides outstanding resistance to pitting, crevice corrosion, and stress corrosion cracking, making it perfect for harsh environments where both strength and corrosion resistance are vital.
Standards : EN, DIN, JIS, ASTM, BS, ASME, AISI
Size : 10 mm To 100 mm Dia in
Length : 100 mm TO 6000 mm Length.
Specifications : ASTM A276, A479 / ASME SA276, SA479
Form : Rectangular
Finish : Bright, Polish & Black
Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | Fe |
S31803 | 0.030 max | 2.00 max | 1.00 max | 0.030 max | 0.020 max | 22.0 – 23.0 | 3.0 – 3.5 | 4.50 – 6.50 | 0.14 – 0.20 | 63.72 min |
S32205 | 0.030 max | 2.00 max | 1.00 max | 0.030 max | 0.020 max | 21.0 – 23.0 | 2.50 – 3.50 | 4.50 – 6.50 | 0.8 – 0.20 | 63.54 min |
| S31803 / S32205 | Density | Melting Point | Yield Strength (0.2%Offset) | Tensile Strength | Elongation |
| 7.8 g/cm3 | 1350 °C (2460 °F) | Psi – 80000 , MPa – 550 | Psi – 116000 , MPa – 800 | 15 % |
Duplex Steel Rectangular Bars can withstand moderate to high temperatures, but their performance may degrade at temperatures above 300°C (572°F). For extreme heat, other alloys like austenitic stainless steel are preferred.
Yes, Duplex Steel Rectangular Bar are highly recyclable. Their durable composition allows them to be melted down and repurposed in various applications without significant loss of material properties.
Duplex Steel Rectangular Bars have excellent natural corrosion resistance due to their alloy composition. However, in highly aggressive environments, additional coatings or treatments may be recommended for enhanced protection.
Duplex Steel Rectangular Bars find extensive use in industries where mechanical strength and corrosion resistance are crucial. They are commonly utilized in chemical and petrochemical equipment, pressure vessels, heat exchangers, offshore oil and gas components, and desalination plants. Furthermore, they are employed in marine engineering, pumps, valves, and fasteners that are exposed to saline or corrosive conditions. The combination of high strength, toughness, and resistance to environmental degradation makes Duplex Steel Rectangular Bars a go-to choice for demanding engineering applications that require reliability, durability, and long-lasting performance.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Semih Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Istanbul, Turkey
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