Semih Metals, located in Istanbul, Turkey, is a reputable manufacturer and supplier of top-notch alloy products, including Duplex Steel S31803 Bars and Rods. With a strong reputation for metallurgical expertise and precision manufacturing, Semih Metals caters to various industries such as oil & gas, petrochemicals, marine, and construction. Duplex S31803 is a nitrogen-enhanced duplex stainless steel that boasts remarkable strength and resistance to corrosion. The bars and rods are produced according to international standards, making them perfect for critical applications in tough and corrosive environments. Semih Metals ensures reliable, custom-sized Duplex S31803 Bars and Rods, complete with technical support and timely global delivery.
Duplex Steel S31803 Bars and Rods consist of roughly 22% chromium (Cr), 5–6.5% nickel (Ni), and 2.5–3.5% molybdenum (Mo), along with nitrogen (N) and iron (Fe) as the base elements. This duplex microstructure, which includes both austenite and ferrite, provides high yield strength—about twice that of austenitic stainless steels—typically around 450 MPa, along with excellent corrosion resistance. The material is resistant to pitting, crevice corrosion, and chloride stress corrosion cracking. Additionally, Duplex S31803 demonstrates good weldability and toughness, making it suitable for high-stress environments. Its mechanical and chemical properties make it a versatile option for demanding structural and process applications.
| Standard | ASTM A276, ASME SA276 |
| Round Bar Size | 3mm~ 800mm |
| Square Bar Size | 4mm* 4mm ~100mm* 100mm |
| Flat Bar Size | 2mm ~ 100mm |
| Hex Bar Size | 2mm ~ 100mm |
| Angle Size | 3mm* 20mm* 20mm~ 12mm* 100mm* 100mm |
| Thickness | 50 mm to 6000 mm Long |
| Length | 1 To 6 Meters, Custom Cut Length |
| Form | Round, Square, Hex(A/F), Rectangle, Billet, Ingot, Forging Etc |
| 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 |
| Density (g/cm 3) | Density (lb/in 3) | Melting Point (°C) | Melting Point (°F) |
| 7.805 | 0.285 | 1420 – 1465 | 2588 – 2669 |
| STANDARD | UNS | WERKSTOFF NR. |
| Duplex S31803 | S31803 | 1.4462 |
Yes, Duplex Steel S31803 rods offer excellent corrosion resistance, particularly against pitting, crevice, and stress corrosion. They are ideal for harsh environments, including marine and chemical applications.
Duplex Steel S31803 bars perform well in high-temperature environments, maintaining strength and resistance to oxidation. They are suitable for applications up to approximately 300°C (572°F).
Yes, Duplex Steel S31803 bars can be customized in size and length to meet specific project requirements. Customization ensures flexibility for various industrial applications.
Duplex Steel S31803 Bars and Rods find extensive use in applications that require both mechanical strength and corrosion resistance. They are commonly used in heat exchangers, pressure vessels, piping systems, pump shafts, fasteners, and structural components in offshore platforms, marine environments, desalination plants, and chemical processing facilities. Their exceptional resistance to chloride-induced corrosion makes them ideal for coastal and subsea installations. These bars and rods are also well-suited for a variety of other demanding applications.
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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