Semih Metals, based in Istanbul, Turkey, is a reputable manufacturer and supplier of high-quality metal products, including Duplex Steel Flat Bars. With a strong focus on quality and precision, Semih Metals caters to various industries such as oil & gas, chemical processing, construction, marine, and water treatment. Duplex Steel Flat Bars are prized for their impressive strength, outstanding corrosion resistance, and versatility in fabrication. Produced to meet international standards, these flat bars are perfect for structural and load-bearing applications. Semih Metals guarantees dependable delivery, competitive pricing, and technical support for clients in demanding industrial sectors around the globe.
Typically, Duplex Steel Flat Bars are crafted from grades like UNS S31803 and S32205, which feature a well-balanced austenitic-ferritic microstructure. Their chemical makeup includes about 22% chromium (Cr), 5–6% nickel (Ni), 3% molybdenum (Mo), and nitrogen (N), providing excellent resistance to pitting, crevice corrosion, and stress corrosion cracking. These flat bars boast high yield strength (450–550 MPa) and good fatigue resistance, surpassing standard austenitic stainless steels. The flat design allows for easy machining, forming, and welding, making them ideal for structural frameworks, brackets, and supports in challenging environments.
| Size | : | 10 mm To 100 mm Dia in 100 mm TO 6000 mm Length. |
| Standard | : | ASTM A276, A479 / ASME SA276, SA479, ASTM A789 / A789M & ASTM A928 / A928M |
| Grade | : | UNS NO. S 31803, S 32205, S 32550, S 32750, S 32760. |
| Finish | : | Bright, Polish & Black |
| End | : | Flat |
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 |
| Grade | Density | Melting point | Yield strength(0.2% offset) | Tensile strength | Elongation |
|---|---|---|---|---|---|
| S32750/S32760 | 7.8g/cm3 | 1350°C(2460°F) | PSi-80000, MPa-550 | PSi-116000, MPa-800 | 15% |
To maintain Duplex Steel Flat Bars, regularly clean them to remove debris, inspect for corrosion, and apply protective coatings if necessary. Ensure proper storage to prevent exposure to harsh chemicals or extreme conditions.
Yes, Duplex Steel Flat Bars are suitable for natural gas applications due to their excellent corrosion resistance and strength, making them ideal for pipelines and equipment exposed to natural gas environments.
Duplex Steel Flat Bars are partially magnetic due to their ferritic phase. While not as magnetic as pure ferritic steels, they may exhibit some magnetic properties, especially in certain conditions.
Duplex Steel Flat Bars find extensive use in industries where mechanical strength and corrosion resistance are paramount. Common applications include structural supports, base plates, frames, ladders, and reinforcement components in offshore platforms, chemical plants, desalination systems, and wastewater treatment facilities. Their ability to resist chloride-induced corrosion makes them particularly suitable for marine and coastal settings. Additionally, flat bars are utilized in fabricated equipment where minimizing weight while ensuring durability is crucial.
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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